WO2008078195A3 - System for baseband predistortion linearization in multi-channel communication - Google Patents

System for baseband predistortion linearization in multi-channel communication Download PDF

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Publication number
WO2008078195A3
WO2008078195A3 PCT/IB2007/004404 IB2007004404W WO2008078195A3 WO 2008078195 A3 WO2008078195 A3 WO 2008078195A3 IB 2007004404 W IB2007004404 W IB 2007004404W WO 2008078195 A3 WO2008078195 A3 WO 2008078195A3
Authority
WO
WIPO (PCT)
Prior art keywords
predistortion
wideband
lookup table
reduce
memory effects
Prior art date
Application number
PCT/IB2007/004404
Other languages
French (fr)
Other versions
WO2008078195A2 (en
Inventor
Jong-Heon Kim
Kyoung-Joon Cho
Wan-Jong Kim
Shawn Patrick Stapleton
Original Assignee
Dali Systems Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39563020&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2008078195(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dali Systems Co., Ltd. filed Critical Dali Systems Co., Ltd.
Priority to CN200780051434.2A priority Critical patent/CN102017553B/en
Priority to KR1020147017682A priority patent/KR20140091616A/en
Priority to EP07870441.8A priority patent/EP2106648B1/en
Priority to JP2009543544A priority patent/JP5236661B2/en
Priority to EP18187871.1A priority patent/EP3416340B1/en
Priority to EP20196761.9A priority patent/EP3790244A1/en
Publication of WO2008078195A2 publication Critical patent/WO2008078195A2/en
Publication of WO2008078195A3 publication Critical patent/WO2008078195A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H04L27/2618—Reduction thereof using auxiliary subcarriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/336—A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/57—Separate feedback of real and complex signals being present
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3224—Predistortion being done for compensating memory effects
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3233—Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0425—Circuits with power amplifiers with linearisation using predistortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03414—Multicarrier

Abstract

An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre- equalizers, to reduce the computational complexity and numerical instability for desired linearity performance with memory effects compensation for wideband transmitter systems. Therefore, the present invention could reduce the computational load, which saves hardware resources in an implementation and improve performance, in terms of adjacent channel power ratio.
PCT/IB2007/004404 2006-12-26 2007-12-20 Method and system for baseband predistortion linearization in multi-channel wideband communication systems WO2008078195A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN200780051434.2A CN102017553B (en) 2006-12-26 2007-12-20 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
KR1020147017682A KR20140091616A (en) 2006-12-26 2007-12-20 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
EP07870441.8A EP2106648B1 (en) 2006-12-26 2007-12-20 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
JP2009543544A JP5236661B2 (en) 2006-12-26 2007-12-20 Method and system for linearizing baseband predistortion in multi-channel wideband communication system
EP18187871.1A EP3416340B1 (en) 2006-12-26 2007-12-20 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
EP20196761.9A EP3790244A1 (en) 2006-12-26 2007-12-20 Method and system for baseband predistortion linearization in multi-channel wideband communication systems

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US87703506P 2006-12-26 2006-12-26
US60/877,035 2006-12-26
US1241607P 2007-12-07 2007-12-07
US61/012,416 2007-12-07

Publications (2)

Publication Number Publication Date
WO2008078195A2 WO2008078195A2 (en) 2008-07-03
WO2008078195A3 true WO2008078195A3 (en) 2011-03-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/004404 WO2008078195A2 (en) 2006-12-26 2007-12-20 Method and system for baseband predistortion linearization in multi-channel wideband communication systems

Country Status (7)

Country Link
US (17) US8149950B2 (en)
EP (3) EP2106648B1 (en)
JP (1) JP5236661B2 (en)
KR (2) KR20140091616A (en)
CN (2) CN102017553B (en)
HK (1) HK1205382A1 (en)
WO (1) WO2008078195A2 (en)

Families Citing this family (211)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8811917B2 (en) 2002-05-01 2014-08-19 Dali Systems Co. Ltd. Digital hybrid mode power amplifier system
US8380143B2 (en) 2002-05-01 2013-02-19 Dali Systems Co. Ltd Power amplifier time-delay invariant predistortion methods and apparatus
US7796960B1 (en) 2006-04-04 2010-09-14 Nortel Networks Limited Signal transmitter linearization
US8886341B1 (en) 2006-04-04 2014-11-11 Microsoft Corporation Adaptive sample-by-sample controller for under-determined systems
CN101416382B (en) * 2006-04-10 2011-05-25 艾利森电话股份有限公司 Method and equipment for reducing frequency memory effect of RF power amplifier
CN102017553B (en) 2006-12-26 2014-10-15 大力系统有限公司 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
US9026067B2 (en) * 2007-04-23 2015-05-05 Dali Systems Co. Ltd. Remotely reconfigurable power amplifier system and method
US8594133B2 (en) 2007-10-22 2013-11-26 Corning Mobileaccess Ltd. Communication system using low bandwidth wires
JP2009111958A (en) * 2007-11-01 2009-05-21 Hitachi Kokusai Electric Inc Predistorter
US8213884B2 (en) 2007-12-07 2012-07-03 Dali System Co. Ltd. Baseband-derived RF digital predistortion
JP4996502B2 (en) * 2008-02-20 2012-08-08 日本無線株式会社 Distortion compensation circuit and predistortion type distortion compensation amplifier
US8064851B2 (en) * 2008-03-06 2011-11-22 Crestcom, Inc. RF transmitter with bias-signal-induced distortion compensation and method therefor
JP5115979B2 (en) * 2008-07-24 2013-01-09 日本無線株式会社 Predistorter
JP5205182B2 (en) * 2008-09-09 2013-06-05 株式会社日立国際電気 Distortion compensation amplifier
TWI390839B (en) * 2008-11-17 2013-03-21 Realtek Semiconductor Corp Distortion correction device and method for power amplifier
JP5238461B2 (en) * 2008-11-19 2013-07-17 日本無線株式会社 Predistorter
EP2394378A1 (en) 2009-02-03 2011-12-14 Corning Cable Systems LLC Optical fiber-based distributed antenna systems, components, and related methods for monitoring and configuring thereof
EP2430531B1 (en) * 2009-04-24 2019-12-04 Dali Systems Co. Ltd. Remotely reconfigurable power amplifier system and method
CA2704522C (en) 2009-05-14 2017-02-14 Seyed Aidin Bassam Multi-cell processing architectures for modeling and impairment compensation in multi-input multi-output systems
US8837629B2 (en) * 2011-05-11 2014-09-16 Fadhel M Ghannouchi Extended bandwidth digital Doherty transmitter
KR101348275B1 (en) * 2009-09-17 2014-01-08 한국전자통신연구원 Pre-distortion apparatus of power amplitude and method the same
CN102025327B (en) * 2009-09-18 2013-01-02 富士通株式会社 Amplifier apparatus and predistortion control method
JP5339083B2 (en) * 2009-10-06 2013-11-13 日本電気株式会社 Digital distortion compensation method and circuit
US8280259B2 (en) 2009-11-13 2012-10-02 Corning Cable Systems Llc Radio-over-fiber (RoF) system for protocol-independent wired and/or wireless communication
US8542768B2 (en) 2009-12-21 2013-09-24 Dali Systems Co. Ltd. High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications
EP2517353B1 (en) 2009-12-21 2016-04-20 Dali Systems Co. Ltd. Modulation agnostic digital hybrid mode power amplifier system and method
FR2954624B1 (en) * 2009-12-23 2012-09-07 Thales Sa LINEARIZING DEVICE FOR POWER AMPLIFIER.
CN102130697B (en) * 2010-01-20 2015-05-27 华为技术有限公司 Receiver, transmitter and feedback device, transceiver and signal processing method
US8275265B2 (en) 2010-02-15 2012-09-25 Corning Cable Systems Llc Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods
US8792581B2 (en) * 2010-02-18 2014-07-29 Telefonaktiebolaget Lm Ericsson (Publ) RF clock generator with spurious tone cancellation
EP2815502B1 (en) 2010-04-21 2018-03-14 ZTE Corporation Improved capture buffer of digital predistortion systems
US9525488B2 (en) 2010-05-02 2016-12-20 Corning Optical Communications LLC Digital data services and/or power distribution in optical fiber-based distributed communications systems providing digital data and radio frequency (RF) communications services, and related components and methods
CN103119865A (en) 2010-08-16 2013-05-22 康宁光缆系统有限责任公司 Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units
CN107682021B (en) 2010-08-17 2020-02-18 大力系统有限公司 Remotely reconfigurable remote radio head unit
KR102136940B1 (en) 2010-09-14 2020-07-23 달리 시스템즈 씨오. 엘티디. Remotely Reconfigurable Distributed Antenna System and Methods
JP2012065154A (en) * 2010-09-16 2012-03-29 Toshiba Corp Apparatus and method for distortion compensation
US9252874B2 (en) 2010-10-13 2016-02-02 Ccs Technology, Inc Power management for remote antenna units in distributed antenna systems
DE102010064396A1 (en) * 2010-12-30 2012-07-05 Intel Mobile Communications GmbH High frequency-regenerative receiver assembly for detecting transmission signal characteristic of transmission signal of radio frequency transmission arrangement, obtains calibration signal in calibration phase based on signal combination
JP5707999B2 (en) * 2011-02-09 2015-04-30 富士通株式会社 Distortion compensation apparatus, transmitter, and distortion compensation method
CN203504582U (en) 2011-02-21 2014-03-26 康宁光缆系统有限责任公司 Distributed antenna system and power supply apparatus for distributing electric power thereof
CN102651725B (en) * 2011-02-25 2015-01-28 中兴通讯股份有限公司 Multi-user frequency offset compensation method and device
US9680567B2 (en) * 2011-03-03 2017-06-13 Acacia Communications, Inc. Fault localization and fiber security in optical transponders
TWI556597B (en) * 2011-03-31 2016-11-01 Panasonic Corp Wireless communication device
CN103609146B (en) 2011-04-29 2017-05-31 康宁光缆系统有限责任公司 For increasing the radio frequency in distributing antenna system（RF）The system of power, method and apparatus
WO2012170983A2 (en) * 2011-06-09 2012-12-13 Andrew Llc Distributed antenna system interface for processing digital signals in a standardized format
CN103733664B (en) 2011-07-11 2017-10-24 康普技术有限责任公司 Method and apparatus for managing distributing antenna system
CN102354118B (en) * 2011-08-10 2013-10-16 复旦大学 Digital predistortion algorithm system suitable for hardware realization
WO2013033199A1 (en) 2011-08-29 2013-03-07 Andrew Llc Configuring a distributed antenna system
CN103999436B (en) 2011-09-02 2016-08-24 大力系统有限公司 For reducing the configurable distributing antenna system of the software of uplink noise and method
JP6080854B2 (en) 2011-09-22 2017-02-15 ダリ システムズ カンパニー リミテッド System and method for increasing the bandwidth of digital predistortion in a multi-channel broadband communication system
US8817859B2 (en) * 2011-10-14 2014-08-26 Fadhel Ghannouchi Digital multi-band predistortion linearizer with nonlinear subsampling algorithm in the feedback loop
US8884796B2 (en) * 2011-10-20 2014-11-11 Kathrein-Werke Kg Delta-sigma modulator with feedback signal modification
US9420628B2 (en) * 2011-11-07 2016-08-16 Dali Systems Co. Ltd. Virtualized wireless network with pilot beacons
MY172058A (en) 2011-11-07 2019-11-13 Dali Systems Co Ltd Virtualized wireless network
CN104040368B (en) 2011-11-07 2017-08-22 大力系统有限公司 Virtualize the soft handover and route data in distributing antenna system
CN103703678A (en) * 2011-12-26 2014-04-02 三菱电机株式会社 Analog feedback amplifier
BR112014020305A8 (en) 2012-02-17 2021-06-29 Dali Systems Co Ltd methods to balance non-uniformly distributed network traffic in a wireless communications system, and to balance non-uniformly distributed network traffic in a distributed antenna system (das) and, distributed antenna system (das)
US8798559B2 (en) * 2012-02-28 2014-08-05 Telefonaktiebolaget L M Ericsson (Publ) FIR/IIR filter predistorter for power amplifiers exhibiting short-term and/or long-term memory effects
WO2013142662A2 (en) 2012-03-23 2013-09-26 Corning Mobile Access Ltd. Radio-frequency integrated circuit (rfic) chip(s) for providing distributed antenna system functionalities, and related components, systems, and methods
WO2013148986A1 (en) 2012-03-30 2013-10-03 Corning Cable Systems Llc Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (mimo) configuration, and related components, systems, and methods
TWI481219B (en) * 2012-04-13 2015-04-11 Accton Technology Corp Donor antenna device, service antenna device used in wireless relay system and signal transmission method of the same
EP2667507B1 (en) * 2012-05-21 2014-10-29 Alcatel Lucent Amplifier
US9363768B2 (en) * 2012-07-09 2016-06-07 Dali Systems Co. Ltd. Self-optimizing distributed antenna system using soft frequency reuse
US9107086B2 (en) 2012-07-20 2015-08-11 Adc Telecommunications, Inc. Integration panel
US10506454B2 (en) * 2012-07-31 2019-12-10 Dali Systems Co., Ltd. Optimization of traffic load in a distributed antenna system
US9179321B2 (en) 2012-08-09 2015-11-03 Axell Wireless Ltd. Digital capacity centric distributed antenna system
US9439242B2 (en) 2012-08-13 2016-09-06 Dali Systems Co., Ltd. Time synchronized routing in a distributed antenna system
JP5853913B2 (en) * 2012-09-12 2016-02-09 富士通株式会社 Address control device, transmission device, and address control method
US8913689B2 (en) 2012-09-24 2014-12-16 Dali Systems Co. Ltd. Wide bandwidth digital predistortion system with reduced sampling rate
US9112549B2 (en) * 2012-10-05 2015-08-18 Dali Systems Co. Ltd. DAS integrated digital off-air repeater
EP2904831B1 (en) 2012-10-05 2017-10-04 Andrew Wireless Systems GmbH Capacity optimization sub-system for distributed antenna system
CA2885238C (en) * 2012-10-31 2021-10-12 Commscope Technologies Llc Digital baseband transport in telecommunications distribution systems
US9455784B2 (en) 2012-10-31 2016-09-27 Corning Optical Communications Wireless Ltd Deployable wireless infrastructures and methods of deploying wireless infrastructures
CA2892508A1 (en) 2012-11-26 2014-05-30 Adc Telecommunications, Inc. Timeslot mapping and/or aggregation element for digital radio frequency transport architecture
KR102131909B1 (en) 2012-11-26 2020-07-08 콤스코프 테크놀로지스 엘엘씨 Flexible, reconfigurable multipoint-to-multipoint digital radio frequency transport architecture
CN105075211B (en) 2012-11-26 2019-08-13 Adc电信股份有限公司 Forward path number summation in digital RF transmission
JP6002557B2 (en) * 2012-11-28 2016-10-05 株式会社日立製作所 Optical multilevel signal pre-equalization circuit, optical multilevel signal pre-equalization transmitter, and polarization multiplexed optical pre-equalization transmitter
CN105308876B (en) 2012-11-29 2018-06-22 康宁光电通信有限责任公司 Remote unit antennas in distributing antenna system combines
ITMO20120317A1 (en) * 2012-12-21 2014-06-22 Teko Telecom S P A SYSTEM AND METHOD FOR DIGITAL PREDISTORS IN POWER AMPLIFIERS, PARTICULARLY FOR RADIOFREQUENCY COMMUNICATIONS
JP6054739B2 (en) * 2012-12-26 2016-12-27 パナソニック株式会社 Distortion compensation apparatus and distortion compensation method
CN103051574B (en) * 2013-01-16 2016-05-11 大唐移动通信设备有限公司 Digital pre-distortion processing method and system
US20140320340A1 (en) * 2013-02-21 2014-10-30 Dali Systems Co. Ltd. Indoor localization using analog off-air access units
KR102058437B1 (en) 2013-02-25 2019-12-26 삼성전자주식회사 Touch sense device including filtered value extractor and filtered value extractor
US9955361B2 (en) 2013-02-26 2018-04-24 Dali Systems Co., Ltd. Method and system for WI-FI data transmission
US8989307B2 (en) * 2013-03-05 2015-03-24 Qualcomm Incorporated Power amplifier system including a composite digital predistorter
US9680423B2 (en) * 2013-03-13 2017-06-13 Analog Devices Global Under-sampling digital pre-distortion architecture
WO2014176173A1 (en) * 2013-04-23 2014-10-30 Dali Systems Co. Ltd. Real-time locating system using gps time difference of arrival with digital off-air access units and remote units
US20140333376A1 (en) * 2013-05-09 2014-11-13 King Fahd University Of Petroleum And Minerals Scalable digital predistortion system
US9172334B2 (en) * 2013-05-09 2015-10-27 King Fahd University Of Petroleum And Minerals Digital predistortion system and method with extended correction bandwidth
WO2014184775A1 (en) * 2013-05-16 2014-11-20 Telefonaktiebolaget L M Ericsson (Publ) Baseband equivalent volterra series for behavioral modeling and digital predistortion of wideband transmitters
CN105531925B (en) 2013-05-20 2018-10-23 美国亚德诺半导体公司 Digitization system linearizes
US9385762B2 (en) 2013-05-22 2016-07-05 Telefonaktiebolaget L M Ericsson (Publ) Linearization of intermodulation bands for concurrent dual-band power amplifiers
US9252718B2 (en) 2013-05-22 2016-02-02 Telefonaktiebolaget L M Ericsson (Publ) Low complexity digital predistortion for concurrent multi-band transmitters
CN103401511A (en) * 2013-07-05 2013-11-20 华南理工大学 Power amplifier pre-distortion method used for real-time system
ES2875954T3 (en) * 2013-07-11 2021-11-11 Andrew Wireless Systems Gmbh Small cellular network architecture for the service of multiple network operators
US9787457B2 (en) 2013-10-07 2017-10-10 Commscope Technologies Llc Systems and methods for integrating asynchronous signals in distributed antenna system with direct digital interface to base station
US9750082B2 (en) 2013-10-07 2017-08-29 Commscope Technologies Llc Systems and methods for noise floor optimization in distributed antenna system with direct digital interface to base station
JP6255917B2 (en) * 2013-11-07 2018-01-10 富士通株式会社 Wireless device and wireless access system
KR102189745B1 (en) * 2013-12-06 2020-12-14 주식회사 쏠리드 A remote device of optical repeater system
US9847816B2 (en) * 2013-12-19 2017-12-19 Dali Systems Co. Ltd. Digital transport of data over distributed antenna network
US20170250927A1 (en) 2013-12-23 2017-08-31 Dali Systems Co. Ltd. Virtual radio access network using software-defined network of remotes and digital multiplexing switches
KR20160106089A (en) * 2014-01-06 2016-09-09 달리 시스템즈 씨오. 엘티디. Network switch for a distributed antenna network
CN104796364B (en) * 2014-01-16 2018-02-27 京信通信系统（中国）有限公司 A kind of pre-distortion parameters acquiring method and pre-distortion system
US10284296B2 (en) * 2014-02-13 2019-05-07 Dali Systems Co. Ltd. System and method for performance optimization in and through a distributed antenna system
AU2015219260A1 (en) * 2014-02-18 2016-08-25 Commscope Technologies Llc Selectively combining uplink signals in distributed antenna systems
US10045306B2 (en) 2014-02-21 2018-08-07 Commscope Technologies Llc Self-optimizing network entity for a telecommunications system
US9775123B2 (en) 2014-03-28 2017-09-26 Corning Optical Communications Wireless Ltd. Individualized gain control of uplink paths in remote units in a distributed antenna system (DAS) based on individual remote unit contribution to combined uplink power
WO2015151086A1 (en) * 2014-03-31 2015-10-08 Corning Optical Communications Wireless Ltd. Distributed antenna system continuity
EP4024719A1 (en) 2014-04-15 2022-07-06 CommScope Technologies LLC Wideband remote unit for distributed antenna system
WO2015163800A1 (en) * 2014-04-24 2015-10-29 Telefonaktiebolaget L M Ericsson (Publ) Compensation for non-linearity in a radio frequency power amplifier
US9408092B2 (en) * 2014-05-23 2016-08-02 Verizon Patent And Licensing Inc. RAN performance through digital signal processing between baseband unit and remote radio heads
US9252821B2 (en) 2014-06-27 2016-02-02 Freescale Semiconductor, Inc. Adaptive high-order nonlinear function approximation using time-domain volterra series to provide flexible high performance digital pre-distortion
US9628119B2 (en) 2014-06-27 2017-04-18 Nxp Usa, Inc. Adaptive high-order nonlinear function approximation using time-domain volterra series to provide flexible high performance digital pre-distortion
US9525472B2 (en) 2014-07-30 2016-12-20 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9730228B2 (en) 2014-08-29 2017-08-08 Corning Optical Communications Wireless Ltd Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit
WO2016049002A1 (en) 2014-09-23 2016-03-31 Axell Wireless Ltd. Automatic mapping and handling pim and other uplink interferences in digital distributed antenna systems
US9420542B2 (en) 2014-09-25 2016-08-16 Corning Optical Communications Wireless Ltd System-wide uplink band gain control in a distributed antenna system (DAS), based on per band gain control of remote uplink paths in remote units
US10659163B2 (en) 2014-09-25 2020-05-19 Corning Optical Communications LLC Supporting analog remote antenna units (RAUs) in digital distributed antenna systems (DASs) using analog RAU digital adaptors
US9184960B1 (en) 2014-09-25 2015-11-10 Corning Optical Communications Wireless Ltd Frequency shifting a communications signal(s) in a multi-frequency distributed antenna system (DAS) to avoid or reduce frequency interference
JP2016072696A (en) 2014-09-26 2016-05-09 富士通株式会社 Distortion compensation device and distortion compensation method
WO2016071902A1 (en) 2014-11-03 2016-05-12 Corning Optical Communications Wireless Ltd. Multi-band monopole planar antennas configured to facilitate improved radio frequency (rf) isolation in multiple-input multiple-output (mimo) antenna arrangement
WO2016075696A1 (en) 2014-11-13 2016-05-19 Corning Optical Communications Wireless Ltd. Analog distributed antenna systems (dass) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (rf) communications signals
US9729267B2 (en) 2014-12-11 2017-08-08 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
WO2016098109A1 (en) 2014-12-18 2016-06-23 Corning Optical Communications Wireless Ltd. Digital interface modules (dims) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (dass)
WO2016098111A1 (en) 2014-12-18 2016-06-23 Corning Optical Communications Wireless Ltd. Digital- analog interface modules (da!ms) for flexibly.distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (dass)
EP3238352A4 (en) 2014-12-23 2018-08-22 Axell Wireless Ltd. Harmonizing noise aggregation and noise management in distributed antenna system
US9362942B1 (en) * 2015-01-12 2016-06-07 Maxim Integrated Products, Inc. System characteristic identification systems and methods
KR102299089B1 (en) * 2015-02-02 2021-09-07 삼성전자 주식회사 Method and apparatus for synchronizing input signal with output signal in wireless communication system
EP3254421B1 (en) 2015-02-05 2022-05-04 Commscope Technologies LLC Systems and methods for emulating uplink diversity signals
US10355895B2 (en) 2015-03-11 2019-07-16 Phluido, Inc. Baseband unit with adaptive fronthaul link for a distributed radio access network
EP3272027A4 (en) 2015-03-16 2018-08-08 Commscope Technologies LLC Das management by radio access network node
CN104796091B (en) * 2015-04-13 2017-12-12 南京理工大学 Power amplifier modeling and digital pre-distortion method based on segmentation memory polynomial
US9484962B1 (en) * 2015-06-05 2016-11-01 Infineon Technologies Ag Device and method for adaptive digital pre-distortion
US9712343B2 (en) 2015-06-19 2017-07-18 Andrew Wireless Systems Gmbh Scalable telecommunications system
CN105024960B (en) * 2015-06-23 2018-11-09 大唐移动通信设备有限公司 A kind of DPD system
NZ778597A (en) * 2015-08-14 2023-05-26 Viasat Inc Digital dynmic bias circuit
CN106507462B (en) * 2015-09-07 2019-11-29 大唐移动通信设备有限公司 A kind of detection method and device of radio frequency remote unit RRU descending power
CN107735968B (en) * 2015-09-30 2019-11-29 华为技术有限公司 The device and method for transmitting signal
US10608734B2 (en) 2015-10-22 2020-03-31 Phluido, Inc. Virtualization and orchestration of a radio access network
CN105356855B (en) * 2015-11-03 2018-03-13 南京邮电大学 A kind of adjustable distributed amplifier circuit
CN105305979B (en) * 2015-11-03 2018-03-06 南京邮电大学 A kind of distributed amplifier circuit for improving the linearity
US9590668B1 (en) 2015-11-30 2017-03-07 NanoSemi Technologies Digital compensator
CN105631540A (en) * 2015-12-27 2016-06-01 哈尔滨米米米业科技有限公司 Underwater vehicle path planning system based on harmony search algorithm
US10638326B2 (en) 2016-02-19 2020-04-28 Corning Optical Communications LLC Long term evolution (LTE) system operating in an unlicensed spectral band with active network discovery and optimization of the unlicensed channels
KR101791636B1 (en) * 2016-03-28 2017-10-30 주식회사 쏠리드 Base station signal matching device, base station interface unit and distributed antenna system comprising the same
US10236924B2 (en) * 2016-03-31 2019-03-19 Corning Optical Communications Wireless Ltd Reducing out-of-channel noise in a wireless distribution system (WDS)
KR20190007469A (en) 2016-05-12 2019-01-22 달리 시스템즈 씨오. 엘티디. Redundancy in Public Safety Distributed Antenna Systems
US10164675B2 (en) 2016-05-27 2018-12-25 Corning Incorporated Wideband digital distributed communications system(s) (DCS) employing programmable digital signal processing circuit for scaling supported communications services
CN106226784B (en) * 2016-06-27 2019-02-01 广东工业大学 Reference base station intelligent dynamic management system and method in satellite positioning enhancing system
US10141937B2 (en) * 2016-08-09 2018-11-27 Andapt, Inc. Pulse-width modulation (PWM) control loop for power application
JP6790665B2 (en) * 2016-09-26 2020-11-25 日本電気株式会社 Calibration circuit, calibration method and program
US10185849B2 (en) 2016-10-07 2019-01-22 Intermec, Inc. Systems and methods for controlling antennas
WO2018067969A1 (en) 2016-10-07 2018-04-12 Nanosemi, Inc. Beam steering digital predistortion
JP6738019B2 (en) * 2016-10-21 2020-08-12 アイコム株式会社 Transmitter and distortion correction method
TWI756284B (en) * 2016-10-27 2022-03-01 美商李爾登公司 Systems and methods for distributing radioheads
US9866269B1 (en) * 2016-11-17 2018-01-09 Xilinx, Inc. Method of and circuit for predistortion for a power amplifier
US10348405B2 (en) * 2016-11-21 2019-07-09 Corning Incorporated Multi-functional units incorporating lighting capabilities in converged networks
US9979422B1 (en) * 2016-12-15 2018-05-22 National Chung Shan Institute Of Science And Technology Adaptive digital pre-distortion system
IT201600131387A1 (en) * 2016-12-27 2018-06-27 Teko Telecom S R L RECONFIGURABLE REMOTE RADIO UNIT FOR ANTENNA DISTRIBUTED SYSTEMS
ES2791540T3 (en) 2017-02-15 2020-11-04 Maven Wireless Sweden Ab Distributed Antenna System that provides redundancy
US11057004B2 (en) 2017-02-25 2021-07-06 Nanosemi, Inc. Multiband digital predistorter
CN108064451A (en) 2017-03-23 2018-05-22 深圳市大疆创新科技有限公司 Aircraft and its external equipment, communication means, device and system
US10135706B2 (en) 2017-04-10 2018-11-20 Corning Optical Communications LLC Managing a communications system based on software defined networking (SDN) architecture
US10141961B1 (en) 2017-05-18 2018-11-27 Nanosemi, Inc. Passive intermodulation cancellation
JP2018207184A (en) * 2017-05-30 2018-12-27 パナソニックＩｐマネジメント株式会社 In-facility transmission system, in-facility transmission method and base station
CN109039969B (en) * 2017-06-09 2020-11-27 中国工程物理研究院电子工程研究所 Method for implementing broadband digital predistorter
US10931318B2 (en) * 2017-06-09 2021-02-23 Nanosemi, Inc. Subsampled linearization system
US10581470B2 (en) 2017-06-09 2020-03-03 Nanosemi, Inc. Linearization system
US11115067B2 (en) * 2017-06-09 2021-09-07 Nanosemi, Inc. Multi-band linearization system
US10339346B2 (en) 2017-06-26 2019-07-02 Intermec, Inc. Systems and methods for a reconfigurable antenna
US10075201B1 (en) * 2017-07-12 2018-09-11 Intel IP Corporation Adaptive nonlinear system control using robust and low-complexity coefficient estimation
WO2019014422A1 (en) 2017-07-12 2019-01-17 Nanosemi, Inc. Monitoring systems and methods for radios implemented with digital predistortion
WO2019054980A1 (en) 2017-09-12 2019-03-21 Intel Corporation Digital predistortion of signals
WO2019070573A1 (en) 2017-10-02 2019-04-11 Nanosemi, Inc. Digital predistortion adjustment based on determination of load condition characteristics
US11564188B2 (en) 2017-10-17 2023-01-24 Telefonaktiebolaget Lm Ericsson (Publ) Distributed MIMO synchronization
EP3714551A1 (en) 2017-11-21 2020-09-30 Telefonaktiebolaget LM Ericsson (publ) Improved antenna arrangement for distributed massive mimo
CN108037752B (en) * 2017-11-30 2020-01-17 中国航空工业集团公司沈阳飞机设计研究所 Dual-redundancy front wheel turning monitoring method
CN108235451A (en) * 2017-12-07 2018-06-29 姬军生 A kind of portable private network base station system of integration
CN108063739A (en) * 2017-12-15 2018-05-22 北京卫星信息工程研究所 Broadband digital communication system transmitting terminal power amplifier adaptive digital pre-distortion method
CN108650048B (en) * 2018-04-03 2019-12-31 广州大学 High-precision digital array multi-channel delay compensation method
US10644657B1 (en) 2018-05-11 2020-05-05 Nanosemi, Inc. Multi-band digital compensator for a non-linear system
KR20210008073A (en) 2018-05-11 2021-01-20 나노세미, 인크. Digital compensator for nonlinear systems
JP2019201361A (en) * 2018-05-17 2019-11-21 富士通株式会社 Distortion compensation apparatus and distortion compensation method
US11863210B2 (en) 2018-05-25 2024-01-02 Nanosemi, Inc. Linearization with level tracking
US10931238B2 (en) 2018-05-25 2021-02-23 Nanosemi, Inc. Linearization with envelope tracking or average power tracking
EP3804127A1 (en) 2018-05-25 2021-04-14 NanoSemi, Inc. Digital predistortion in varying operating conditions
KR102452622B1 (en) * 2018-06-11 2022-10-07 삼성전자주식회사 Eqializer and transmitter including the same
US10791475B2 (en) * 2018-11-06 2020-09-29 Corning Optical Communications LLC Systems and methods for performance evaluations in distributed antenna systems (DASs)
DE102018220089A1 (en) * 2018-11-22 2020-05-28 Infineon Technologies Ag Digital predistortion technology for a circuit arrangement with a power amplifier
US10985951B2 (en) 2019-03-15 2021-04-20 The Research Foundation for the State University Integrating Volterra series model and deep neural networks to equalize nonlinear power amplifiers
CN110289869B (en) * 2019-05-25 2021-01-01 西南电子技术研究所（中国电子科技集团公司第十研究所） Digital predistortion model of ultrashort wave power amplifier
US11405582B2 (en) 2019-06-28 2022-08-02 Meta Platforms, Inc. Preprocessing of high-dynamic-range video using a hybrid lookup table scheme
US10887079B1 (en) 2019-09-26 2021-01-05 Corning Research & Development Corporation Digital predistortion (DPD) timing alignment in a remote unit(s) for a wireless communications system (WCS)
US11418277B2 (en) * 2019-11-15 2022-08-16 Solid, Inc. Optical communication system and method of monitoring thereof
WO2021101649A1 (en) * 2019-11-18 2021-05-27 Commscope Technologies Llc Systems and methods for a multiple-operator distributed antenna system
WO2021213677A1 (en) * 2020-04-24 2021-10-28 Telefonaktiebolaget Lm Ericsson (Publ) Failsafe series-connected radio system
US10992326B1 (en) 2020-05-19 2021-04-27 Nanosemi, Inc. Buffer management for adaptive digital predistortion
US11190230B1 (en) 2020-05-29 2021-11-30 Corning Research & Development Corporation Wide bandwidth digital pre-distortion (DPD) in a remote unit(s) for a wireless communications system (WCS)
US20220021406A1 (en) * 2020-07-14 2022-01-20 Intel Corporation Concept for an RF Frontend
CN112583370B (en) * 2020-12-10 2023-03-21 中国工程物理研究院电子工程研究所 Power amplification device with high efficiency and high linearity
US11251819B1 (en) * 2020-12-23 2022-02-15 Xilinx, Inc. Thermal effect mitigation for digital pre-distortion
US11818808B2 (en) * 2021-01-29 2023-11-14 Dali Systems Co. Ltd. Redundant distributed antenna system (DAS) with failover capability
CN112996019B (en) * 2021-03-01 2021-08-27 军事科学院系统工程研究院网络信息研究所 Terahertz frequency band distributed constellation access control method based on multi-objective optimization
WO2022185505A1 (en) * 2021-03-05 2022-09-09 三菱電機株式会社 Learning device for distortion compensation circuit, and distortion compensation circuit
US11942899B2 (en) 2021-06-18 2024-03-26 Qorvo Us, Inc. Envelope tracking voltage correction in a transmission circuit
IL311085A (en) * 2021-08-27 2024-04-01 Aciist Smart Networks Ltd Implementation of a distributed layer two switch
US20230080621A1 (en) * 2021-09-16 2023-03-16 Qorvo Us, Inc. Phase and amplitude error correction in a transmission circuit
US11906992B2 (en) 2021-09-16 2024-02-20 Qorvo Us, Inc. Distributed power management circuit
CN114421902B (en) * 2022-01-21 2023-06-06 上海物骐微电子有限公司 Predistortion calibration method and application suitable for WiFi memory-free power amplifier
CN114520993B (en) * 2022-03-08 2024-01-05 沈阳中科奥维科技股份有限公司 Wireless transmission system network self-optimizing method based on channel quality monitoring
CN115278746B (en) * 2022-07-28 2023-03-28 北京邮电大学 Self-adaptive fast error correction digital predistortion method for 5G broadband power amplifier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121412A (en) * 1989-01-03 1992-06-09 Motorola, Inc. All-digital quadrature modulator
US5963549A (en) * 1997-12-10 1999-10-05 L-3 Communications Corporation Fixed wireless loop system having baseband combiner predistortion summing table
US6963242B2 (en) * 2003-07-31 2005-11-08 Andrew Corporation Predistorter for phase modulated signals with low peak to average ratios

Family Cites Families (514)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700151A (en) 1985-03-20 1987-10-13 Nec Corporation Modulation system capable of improving a transmission system
US4638248A (en) 1985-06-10 1987-01-20 Massachusetts Institute Of Technology Methods and apparatus for measuring relative gain and phase of voltage input signals versus voltage output signals
DE3604893A1 (en) 1986-02-15 1987-08-20 Honeywell Elac Nautik Gmbh METHOD AND DEVICE FOR DETECTING MINIMUM QUANTITIES OF GASES OR STEAMS IN GAS MIXTURES
US4755795A (en) 1986-10-31 1988-07-05 Hewlett-Packard Company Adaptive sample rate based on input signal bandwidth
GB2204202B (en) 1987-04-28 1991-11-27 Racal Communications Equip Radio transmitters
GB8826476D0 (en) 1988-11-11 1988-12-14 British Telecomm Communications system
US4929906A (en) 1989-01-23 1990-05-29 The Boeing Company Amplifier linearization using down/up conversion
FR2642243B1 (en) 1989-01-24 1991-04-19 Labo Electronique Physique ADAPTIVE PREDISTORSION CIRCUIT
US5132639A (en) 1989-09-07 1992-07-21 Ortel Corporation Predistorter for linearization of electronic and optical signals
FR2652965A1 (en) 1989-10-06 1991-04-12 Philips Electronique Lab PREDISTORSION DEVICE FOR DIGITAL TRANSMISSION SYSTEM.
US4999831A (en) 1989-10-19 1991-03-12 United Telecommunications, Inc. Synchronous quantized subcarrier multiplexer for digital transport of video, voice and data
US5049832A (en) 1990-04-20 1991-09-17 Simon Fraser University Amplifier linearization by adaptive predistortion
JPH04207532A (en) 1990-11-30 1992-07-29 Nippon Telegr & Teleph Corp <Ntt> Communication equipment
US5678198A (en) 1991-05-22 1997-10-14 Southwestern Bell Technology Resources, Inc. System for controlling signal level at both ends of a transmission link, based upon a detected value
CA2066540C (en) 1991-06-13 1998-01-20 Edwin A. Kelley Multiple user digital receiving apparatus and method with time division multiplexing
JPH05136724A (en) 1991-11-15 1993-06-01 A T R Koudenpa Tsushin Kenkyusho:Kk Mobile body radio communication system
GB2268364B (en) 1992-06-25 1995-10-11 Roke Manor Research Improvements in or relating to radio communication systems
US5627879A (en) 1992-09-17 1997-05-06 Adc Telecommunications, Inc. Cellular communications system with centralized base stations and distributed antenna units
JP3156439B2 (en) 1993-04-20 2001-04-16 三菱電機株式会社 Distortion compensation circuit
JP2883260B2 (en) 1993-04-20 1999-04-19 三菱電機株式会社 Distortion compensation circuit
US7924783B1 (en) 1994-05-06 2011-04-12 Broadcom Corporation Hierarchical communications system
US5619202A (en) 1994-11-22 1997-04-08 Analog Devices, Inc. Variable sample rate ADC
IT1265271B1 (en) 1993-12-14 1996-10-31 Alcatel Italia BASEBAND PREDISTRITORTION SYSTEM FOR THE ADAPTIVE LINEARIZATION OF POWER AMPLIFIERS
US5457557A (en) 1994-01-21 1995-10-10 Ortel Corporation Low cost optical fiber RF signal distribution system
US5452473A (en) 1994-02-28 1995-09-19 Qualcomm Incorporated Reverse link, transmit power correction and limitation in a radiotelephone system
US5973011A (en) 1994-03-30 1999-10-26 Isis Pharma Gmbh Pharmaceutical preparations and medicaments for the prevention and treatment of endothelial dysfunction
US5579342A (en) 1994-09-22 1996-11-26 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Communications Pre-compensated frequency modulation (PFM)
US5748683A (en) 1994-12-29 1998-05-05 Motorola, Inc. Multi-channel transceiver having an adaptive antenna array and method
US5579341A (en) 1994-12-29 1996-11-26 Motorola, Inc. Multi-channel digital transceiver and method
US5486789A (en) 1995-02-28 1996-01-23 Motorola, Inc. Apparatus and method for providing a baseband digital error signal in an adaptive predistorter
JP2967699B2 (en) 1995-03-06 1999-10-25 日本電気株式会社 Transmission device
US5596600A (en) * 1995-04-06 1997-01-21 Mayflower Communications Company, Inc. Standalone canceller of narrow band interference for spread spectrum receivers
FI98014C (en) 1995-06-30 1997-03-25 Nokia Mobile Phones Ltd Cube circuit for pre-distorting the signal
US5870668A (en) 1995-08-18 1999-02-09 Fujitsu Limited Amplifier having distortion compensation and base station for radio communication using the same
US6356555B1 (en) 1995-08-25 2002-03-12 Terayon Communications Systems, Inc. Apparatus and method for digital data transmission using orthogonal codes
US5903823A (en) 1995-09-19 1999-05-11 Fujitsu Limited Radio apparatus with distortion compensating function
US5589797A (en) 1995-09-26 1996-12-31 Lucent Technologies Inc. Low distortion amplifier
US6005884A (en) 1995-11-06 1999-12-21 Ems Technologies, Inc. Distributed architecture for a wireless data communications system
US5794153A (en) 1995-12-26 1998-08-11 Lucent Technologies Inc. Estimating PCS traffic from radio port measurements
US5675287A (en) 1996-02-12 1997-10-07 Motorola, Inc. Digital DC correction circuit for a linear transmitter
US5880863A (en) 1996-02-13 1999-03-09 Gte Laboratories Incorporated Reconfigurable ring system for the transport of RF signals over optical fibers
US5732333A (en) 1996-02-14 1998-03-24 Glenayre Electronics, Inc. Linear transmitter using predistortion
US5937011A (en) 1996-03-26 1999-08-10 Airnet Communications Corp. Multi-carrier high power amplifier using digital pre-distortion
US5740520A (en) 1996-04-03 1998-04-14 State Of Israel Channel correction transceiver
JP2738385B2 (en) 1996-04-15 1998-04-08 日本電気株式会社 Variable bandwidth frequency division multiplex communication system
JPH09284149A (en) 1996-04-17 1997-10-31 Nec Corp Automatic gain control circuit for power amplifier section
US5831479A (en) 1996-06-13 1998-11-03 Motorola, Inc. Power delivery system and method of controlling the power delivery system for use in a radio frequency system
EP0885482B1 (en) 1996-06-19 1999-08-04 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Pre-distortion for a non-linear transmission path in the high frequency range
US5757229A (en) 1996-06-28 1998-05-26 Motorola, Inc. Bias circuit for a power amplifier
AU3567997A (en) 1996-07-05 1998-02-02 Paulo Correa Controller-based radio frequency amplifier module and method
US5898338A (en) * 1996-09-20 1999-04-27 Spectrian Adaptive digital predistortion linearization and feed-forward correction of RF power amplifier
US6493335B1 (en) * 1996-09-24 2002-12-10 At&T Corp. Method and system for providing low-cost high-speed data services
FR2755335B1 (en) 1996-10-24 1998-11-27 Alsthom Cge Alcatel ESTIMATOR OF THE BALANCE DEFECT OF A QUADRATURE MODULATOR AND MODULATION STAGE USING THE SAME
US6205133B1 (en) 1996-11-25 2001-03-20 Ericsson Inc. Flexible wideband architecture for use in radio communications systems
US5920808A (en) 1996-12-12 1999-07-06 Glenayre Electronics, Inc. Method and apparatus for reducing key-up distortion by pre-heating transistors
US6246865B1 (en) 1997-02-04 2001-06-12 Samsung Electronics Co., Ltd. Device and method for controlling distortion characteristic of predistorter
US6112086A (en) 1997-02-25 2000-08-29 Adc Telecommunications, Inc. Scanning RSSI receiver system using inverse fast fourier transforms for a cellular communications system with centralized base stations and distributed antenna units
US5923712A (en) 1997-05-05 1999-07-13 Glenayre Electronics, Inc. Method and apparatus for linear transmission by direct inverse modeling
KR100307665B1 (en) 1997-05-23 2001-10-19 하재홍 Lock and key system employing an id code
US6072364A (en) 1997-06-17 2000-06-06 Amplix Adaptive digital predistortion for power amplifiers with real time modeling of memoryless complex gains
KR100251561B1 (en) 1997-06-19 2000-04-15 윤종용 Apparatus and method for linearizing tx signal in digital communication system
US5810888A (en) 1997-06-26 1998-09-22 Massachusetts Institute Of Technology Thermodynamic adaptive phased array system for activating thermosensitive liposomes in targeted drug delivery
US6081158A (en) 1997-06-30 2000-06-27 Harris Corporation Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
US6639050B1 (en) 1997-07-21 2003-10-28 Ohio University Synthetic genes for plant gums and other hydroxyproline-rich glycoproteins
US6252461B1 (en) 1997-08-25 2001-06-26 Frederick Herbert Raab Technique for wideband operation of power amplifiers
US5959499A (en) 1997-09-30 1999-09-28 Motorola, Inc. Predistortion system and method using analog feedback loop for look-up table training
US6393007B1 (en) 1997-10-16 2002-05-21 Telefonaktiebolaget Lm Ericsson (Publ) Method of and a system for voice and data radio communication providing improved interference diversity
US5936464A (en) 1997-11-03 1999-08-10 Motorola, Inc. Method and apparatus for reducing distortion in a high efficiency power amplifier
US6005506A (en) 1997-12-09 1999-12-21 Qualcomm, Incorporated Receiver with sigma-delta analog-to-digital converter for sampling a received signal
JP3171157B2 (en) 1997-12-10 2001-05-28 松下電器産業株式会社 Nonlinear distortion compensator
US6252912B1 (en) 1997-12-24 2001-06-26 General Dynamics Government Systems Corporation Adaptive predistortion system
US5959500A (en) 1998-01-26 1999-09-28 Glenayre Electronics, Inc. Model-based adaptive feedforward amplifier linearizer
GB9804835D0 (en) 1998-03-06 1998-04-29 Wireless Systems Int Ltd Predistorter
US6215354B1 (en) 1998-03-06 2001-04-10 Fujant, Inc. Closed loop calibration for an amplitude reconstruction amplifier
US6300956B1 (en) 1998-03-17 2001-10-09 Pixar Animation Stochastic level of detail in computer animation
US6288610B1 (en) 1998-03-19 2001-09-11 Fujitsu Limited Method and apparatus for correcting signals, apparatus for compensating for distortion, apparatus for preparing distortion compensating data, and transmitter
FI105506B (en) 1998-04-30 2000-08-31 Nokia Networks Oy Linearization procedure for amplifiers and amplifier arrangements
US5999990A (en) 1998-05-18 1999-12-07 Motorola, Inc. Communicator having reconfigurable resources
GB9811381D0 (en) 1998-05-27 1998-07-22 Nokia Mobile Phones Ltd Predistortion control for power reduction
US6054896A (en) 1998-12-17 2000-04-25 Datum Telegraphic Inc. Controller and associated methods for a linc linear power amplifier
US6373611B1 (en) 1998-06-22 2002-04-16 Scientific-Atlanta, Inc. Digital optical transmitter
US6600792B2 (en) 1998-06-26 2003-07-29 Qualcomm Incorporated Predistortion technique for high power amplifiers
US6266531B1 (en) 1998-07-01 2001-07-24 Ericsson Inc. System and method for adaptive thresholds for cell load sharing
US6253094B1 (en) 1998-07-09 2001-06-26 Airnet Communications Corporation Sectorized cell having non-redundant broadband processing unit
KR100326176B1 (en) 1998-08-06 2002-04-17 윤종용 Apparatus and method for linearizing power amplification using predistortion and feedfoward method in rf communicaiton
US6124758A (en) 1998-08-19 2000-09-26 Harris Corporation RF power amplifier control system
US6430402B1 (en) 1998-09-14 2002-08-06 Conexant Systems, Inc. Power amplifier saturation prevention method, apparatus, and communication system incorporating the same
US6594253B1 (en) 1998-09-29 2003-07-15 Ericsson Inc. System and method for mobility management for an internet telephone call to a mobile terminal
US6315189B1 (en) 1998-10-13 2001-11-13 Texas Instruments Incorporated Semiconductor package lead plating method and apparatus
US6301579B1 (en) 1998-10-20 2001-10-09 Silicon Graphics, Inc. Method, system, and computer program product for visualizing a data structure
WO2000023956A1 (en) 1998-10-22 2000-04-27 University Of Maryland Method and system for providing location dependent and personal identification information to a public safety answering point
FI105612B (en) 1998-10-23 2000-09-15 Nokia Networks Oy Method and circuitry for correcting phase error in power amplifier linearization loop
US6275685B1 (en) 1998-12-10 2001-08-14 Nortel Networks Limited Linear amplifier arrangement
KR20000039780A (en) 1998-12-16 2000-07-05 김영환 Monitoring and controlling system for d-trs base station using rtu
US6236267B1 (en) 1998-12-29 2001-05-22 International Business Machines Corporation Linearization for power amplifiers using feed-forward and feedback control
US6166601A (en) 1999-01-07 2000-12-26 Wiseband Communications Ltd. Super-linear multi-carrier power amplifier
US6356369B1 (en) 1999-02-22 2002-03-12 Scientific-Atlanta, Inc. Digital optical transmitter for processing externally generated information in the reverse path
JP2000278237A (en) 1999-03-25 2000-10-06 Toshiba Corp Repeater for ofdm
JP2000278166A (en) 1999-03-26 2000-10-06 Nec Corp Software mobile phone
FI990680A (en) 1999-03-26 2000-09-27 Nokia Networks Oy I / Q modulator non-linearity correction
GB2348755B (en) 1999-04-01 2001-03-07 Wireless Systems Int Ltd Signal processing
US6657993B1 (en) * 1999-05-11 2003-12-02 Lucent Technologies Inc. System and method for variable bandwidth transmission facilities between a local telephone switch and a remote line unit
US6614854B1 (en) 1999-05-28 2003-09-02 Carriercomm, Inc. System and method for adaptive predistortion
IT1313906B1 (en) 1999-06-15 2002-09-26 Cit Alcatel ADAPTIVE DIGITAL PRECORRECTION OF NON-LINEARITY INTRODUCED BY POWER AMPLICATORS.
US6724737B1 (en) 1999-06-17 2004-04-20 Lockheed Martin Global Telecommunications, Inc System for controlling communications between a terminal and satellite and method therefore
GB2351624B (en) 1999-06-30 2003-12-03 Wireless Systems Int Ltd Reducing distortion of signals
JP2001016116A (en) 1999-07-02 2001-01-19 Nec Corp Portable radio equipment
US6697436B1 (en) 1999-07-13 2004-02-24 Pmc-Sierra, Inc. Transmission antenna array system with predistortion
US6587514B1 (en) 1999-07-13 2003-07-01 Pmc-Sierra, Inc. Digital predistortion methods for wideband amplifiers
US6356146B1 (en) 1999-07-13 2002-03-12 Pmc-Sierra, Inc. Amplifier measurement and modeling processes for use in generating predistortion parameters
US7409007B1 (en) 1999-09-14 2008-08-05 Lucent Technologies Inc. Method and apparatus for reducing adjacent channel power in wireless communication systems
EP1085773A1 (en) 1999-09-20 2001-03-21 Nortel Matra Cellular Mobile telecommunications network with distributed base stations
US6246286B1 (en) 1999-10-26 2001-06-12 Telefonaktiebolaget Lm Ericsson Adaptive linearization of power amplifiers
JP3381689B2 (en) 1999-11-30 2003-03-04 日本電気株式会社 Nonlinear distortion compensation circuit, transmission device using the same, and mobile communication device
US6697603B1 (en) 1999-12-13 2004-02-24 Andrew Corporation Digital repeater
US7257328B2 (en) 1999-12-13 2007-08-14 Finisar Corporation System and method for transmitting data on return path of a cable television system
JP4014343B2 (en) 1999-12-28 2007-11-28 富士通株式会社 Distortion compensation device
JP4183364B2 (en) 1999-12-28 2008-11-19 富士通株式会社 Distortion compensation device
US6751447B1 (en) 1999-12-30 2004-06-15 Samsung Electronics Cop., Ltd. Adaptive digital pre-distortion circuit using output reference signal and method of operation
US7260620B1 (en) 2000-01-05 2007-08-21 Cisco Technology, Inc. System for selecting the operating frequency of a communication device in a wireless network
US6359504B1 (en) 2000-01-28 2002-03-19 Lucent Technologies Inc. Power amplifier using upstream signal information
WO2001056197A2 (en) 2000-01-28 2001-08-02 Scientific-Atlanta, Inc. Digital downstream communication system
JP3578957B2 (en) 2000-02-03 2004-10-20 株式会社日立国際電気 Amplifier
US6242979B1 (en) 2000-02-23 2001-06-05 Motorola, Inc. Linearization using parallel cancellation in linear power amplifier
GB2359679B (en) 2000-02-24 2004-03-10 Wireless Systems Int Ltd Amplifier
GB2359681B (en) 2000-02-25 2004-03-10 Wireless Systems Int Ltd Switched amplifier
JP4346200B2 (en) 2000-03-17 2009-10-21 株式会社東芝 Terrestrial broadcast control system
AU2001247819A1 (en) 2000-03-27 2001-10-08 Transcept Opencell, Inc. Multi-protocol distributed wireless system architecture
US6741662B1 (en) 2000-04-17 2004-05-25 Intel Corporation Transmitter linearization using fast predistortion
US6980527B1 (en) 2000-04-25 2005-12-27 Cwill Telecommunications, Inc. Smart antenna CDMA wireless communication system
WO2001084865A1 (en) 2000-04-27 2001-11-08 Lgc Wireless, Inc. Adaptive capacity management in a centralized basestation architecture
US6353600B1 (en) 2000-04-29 2002-03-05 Lgc Wireless, Inc. Dynamic sectorization in a CDMA cellular system employing centralized base-station architecture
GB0011326D0 (en) 2000-05-11 2000-06-28 Nortel Networks Corp A linear amplifier arrangement
DE10025287B4 (en) * 2000-05-22 2006-06-08 Siemens Ag A method and communication system for estimating a downlink interference covariance matrix in cellular mobile radio networks using adaptive antennas
US6489846B2 (en) 2000-05-25 2002-12-03 Sony Corporation Distortion compensating device and distortion compensating method
JP4326673B2 (en) 2000-06-06 2009-09-09 富士通株式会社 Method for starting communication apparatus having nonlinear distortion compensation apparatus
JP2002009557A (en) 2000-06-21 2002-01-11 Matsushita Electric Ind Co Ltd Linear compensation amplifier
US6704545B1 (en) 2000-07-19 2004-03-09 Adc Telecommunications, Inc. Point-to-multipoint digital radio frequency transport
US6898252B1 (en) 2000-07-21 2005-05-24 Intel Corporation IQ mismatch cancellation
US6351189B1 (en) 2000-07-31 2002-02-26 Nokia Networks Oy System and method for auto-bias of an amplifier
US6804540B1 (en) 2000-08-02 2004-10-12 Ericsson Inc. Remote band-pass filter in a distributed antenna system
US6639463B1 (en) 2000-08-24 2003-10-28 Lucent Technologies Inc. Adaptive power amplifier system and method
JP3590571B2 (en) * 2000-08-30 2004-11-17 株式会社日立国際電気 Distortion compensator
FR2813487B1 (en) 2000-08-31 2002-11-29 Cit Alcatel METHOD AND DEVICE FOR CONTROLLING THE AMPLIFICATION OF THE SIGNAL TRANSMITTED BY A MOBILE TERMINAL FOR INCREASING THE AUTONOMY OF SAID MOBILE TERMINAL
US6445688B1 (en) 2000-08-31 2002-09-03 Ricochet Networks, Inc. Method and apparatus for selecting a directional antenna in a wireless communication system
KR100374828B1 (en) 2000-09-15 2003-03-04 엘지전자 주식회사 Adaptive predistortion transmitter
WO2002023956A2 (en) 2000-09-15 2002-03-21 Teledyne Lighting And Display Products, Inc. Power supply for light emitting diodes
DE10046059A1 (en) 2000-09-18 2002-03-28 Oskar Bschorr Flat speaker
JP2002111401A (en) 2000-10-03 2002-04-12 Fujitsu Ltd Signal distortion compensation apparatus and signal distortion compensation method
WO2002056481A2 (en) 2000-10-27 2002-07-18 Chameleon Systems, Inc. System and method of implementing a wireless communication system using a reconfigurable chip with a reconfigurable fabric
CA2362104A1 (en) 2000-10-30 2002-04-30 Simon Fraser University High efficiency power amplifier systems and methods
US20020179830A1 (en) * 2000-11-01 2002-12-05 Pearson Robert M. Halbach Dipole magnet shim system
US7072650B2 (en) 2000-11-13 2006-07-04 Meshnetworks, Inc. Ad hoc peer-to-peer mobile radio access system interfaced to the PSTN and cellular networks
JP3388409B2 (en) 2000-11-22 2003-03-24 国土交通省国土技術政策総合研究所長 Roadside communication network
US6424225B1 (en) 2000-11-27 2002-07-23 Conexant Systems, Inc. Power amplifier circuit for providing constant bias current over a wide temperature range
US7016332B2 (en) * 2000-12-05 2006-03-21 Science Applications International Corporation Method and system for a remote downlink transmitter for increasing the capacity of a multiple access interference limited spread-spectrum wireless network
US6907490B2 (en) 2000-12-13 2005-06-14 Intel Corporation Method and an apparatus for a re-configurable processor
GB2370170B (en) * 2000-12-15 2003-01-29 Ntl Group Ltd Signal transmission systems
KR20020054149A (en) 2000-12-27 2002-07-06 엘지전자 주식회사 Base station transmitter with digital predistorter
KR100459412B1 (en) 2000-12-28 2004-12-03 엘지전자 주식회사 Received apparatus for code division multiple access optic repeater using transmisson apparatus of digital signal
US6901256B2 (en) 2000-12-29 2005-05-31 Sprint Spectrum L.P. Cellular/PCS CDMA system with pilot beacons for call handoffs
US6801767B1 (en) 2001-01-26 2004-10-05 Lgc Wireless, Inc. Method and system for distributing multiband wireless communications signals
JP3690988B2 (en) 2001-02-01 2005-08-31 株式会社日立国際電気 Predistortion distortion compensation device
US7145704B1 (en) 2003-11-25 2006-12-05 Cheetah Omni, Llc Optical logic gate based optical router
KR100398664B1 (en) 2001-02-21 2003-09-19 주식회사 쏠리테크 Device for Linearizing Power Amplifier with Predistortion in IF Band
US6983025B2 (en) 2001-04-11 2006-01-03 Tropian, Inc. High quality power ramping in a communications transmitter
WO2002091692A1 (en) 2001-04-13 2002-11-14 Girard Gregory D Ditributed edge switching system for voice-over-packet multiservice network
JP3857652B2 (en) 2001-04-18 2006-12-13 富士通株式会社 Distortion compensation device
US6404284B1 (en) 2001-04-19 2002-06-11 Anadigics, Inc. Amplifier bias adjustment circuit to maintain high-output third-order intermodulation distortion performance
US9893774B2 (en) 2001-04-26 2018-02-13 Genghiscomm Holdings, LLC Cloud radio access network
WO2002099999A1 (en) 2001-05-31 2002-12-12 Magn0Lia Broadband, Inc. Communication device with smart antenna using a quality-indication signal
US6903604B2 (en) 2001-06-07 2005-06-07 Lucent Technologies Inc. Method and apparatus for modeling and estimating the characteristics of a power amplifier
US6928122B2 (en) 2001-06-07 2005-08-09 Motorola, Inc. Amplifier predistortion system and method
US20020191565A1 (en) 2001-06-08 2002-12-19 Sanjay Mani Methods and systems employing receive diversity in distributed cellular antenna applications
EP1400141B1 (en) 2001-06-08 2010-03-10 Nextg Networks Network and method for connecting antennas to base stations in a wireless communication network using space diversity
US7127175B2 (en) 2001-06-08 2006-10-24 Nextg Networks Method and apparatus for multiplexing in a wireless communication infrastructure
US6826164B2 (en) 2001-06-08 2004-11-30 Nextg Networks Method and apparatus for multiplexing in a wireless communication infrastructure
US7035345B2 (en) 2001-06-08 2006-04-25 Polyvalor S.E.C. Adaptive predistortion device and method using digital receiver
US7068984B2 (en) 2001-06-15 2006-06-27 Telefonaktiebolaget Lm Ericsson (Publ) Systems and methods for amplification of a communication signal
GB2376583B (en) 2001-06-15 2005-01-05 Wireless Systems Int Ltd Time alignment of signals
US7203247B2 (en) 2001-07-23 2007-04-10 Agere Systems Inc. Digital predistortion technique for WCDMA wireless communication system and method of operation thereof
EP1282328A1 (en) 2001-07-27 2003-02-05 Alcatel Method of establishing telecommunications connections in the connection area of a subscriber switch, subscriber interface system, subscriber switch, and subscriber access point
KR100422133B1 (en) 2001-07-27 2004-03-12 엘지전자 주식회사 Apparatus and method for processing packet data in W-WLL system
US7158765B2 (en) 2001-07-31 2007-01-02 Agere Systems, Inc. Method and apparatus for controlling power of a transmitted signal
US20030058959A1 (en) 2001-09-25 2003-03-27 Caly Networks. Combined digital adaptive pre-distorter and pre-equalizer system for modems in link hopping radio networks
US8446530B2 (en) 2001-09-28 2013-05-21 Entropic Communications, Inc. Dynamic sampling
US7109998B2 (en) 2001-10-03 2006-09-19 Sun Microsystems, Inc. Stationary semantic zooming
KR100835847B1 (en) 2001-10-10 2008-06-05 텔레포나크티에볼라게트 엘엠 에릭슨(피유비엘) Digital Data Recovery Method and Circuit
US7103329B1 (en) 2001-10-25 2006-09-05 Rockwell Collins, Inc. Adaptive feedback channel for radio frequency power amplifiers
SE520466C2 (en) * 2001-11-12 2003-07-15 Ericsson Telefon Ab L M Method and apparatus for a digital linearization connection
US7058139B2 (en) 2001-11-16 2006-06-06 Koninklijke Philips Electronics N.V. Transmitter with transmitter chain phase adjustment on the basis of pre-stored phase information
US6657510B2 (en) 2001-11-27 2003-12-02 Harris Corporation Corrective phase quadrature modulator system and method
US8396368B2 (en) 2009-12-09 2013-03-12 Andrew Llc Distributed antenna system for MIMO signals
JP2003168931A (en) 2001-12-04 2003-06-13 Nec Corp Distortion compensating circuit
US6703897B2 (en) 2001-12-26 2004-03-09 Nortel Networks Limited Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers
US7339891B2 (en) 2002-01-09 2008-03-04 Mverify Corporation Method and system for evaluating wireless applications
US6993302B2 (en) 2002-01-15 2006-01-31 Igor Bausov Class-L power-output amplifier
US7079818B2 (en) 2002-02-12 2006-07-18 Broadcom Corporation Programmable mutlistage amplifier and radio applications thereof
JP3972664B2 (en) 2002-01-23 2007-09-05 日本電気株式会社 Path failure recovery method, failback method after failure recovery, and nodes using them
KR100553252B1 (en) 2002-02-01 2006-02-20 아바고테크놀로지스코리아 주식회사 Power Amplification Apparatus of Portable Terminal
US7248642B1 (en) 2002-02-05 2007-07-24 Andrew Corporation Frequency-dependent phase pre-distortion for reducing spurious emissions in communication networks
US6731168B2 (en) 2002-02-06 2004-05-04 Intersil Americas, Inc. Power amplifier linearizer that compensates for long-time-constant memory effects and method therefor
US6566944B1 (en) 2002-02-21 2003-05-20 Ericsson Inc. Current modulator with dynamic amplifier impedance compensation
US7339897B2 (en) 2002-02-22 2008-03-04 Telefonaktiebolaget Lm Ericsson (Publ) Cross-layer integrated collision free path routing
US6882833B2 (en) * 2002-02-22 2005-04-19 Blue7 Communications Transferring data in a wireless communication system
US7197085B1 (en) 2002-03-08 2007-03-27 Andrew Corporation Frequency-dependent magnitude pre-distortion for reducing spurious emissions in communication networks
US6747649B1 (en) 2002-03-19 2004-06-08 Aechelon Technology, Inc. Terrain rendering in a three-dimensional environment
US6983026B2 (en) 2002-03-19 2006-01-03 Motorola, Inc. Method and apparatus using base band transformation to improve transmitter performance
US7489632B2 (en) 2002-03-22 2009-02-10 Nokia Corporation Simple admission control for IP based networks
US20030179830A1 (en) 2002-03-25 2003-09-25 Eidson Donald B. Efficient, high fidelity transmission of modulation schemes through power-constrained remote relay stations by local transmit predistortion and local receiver feedback
WO2003081870A1 (en) 2002-03-26 2003-10-02 Her Majesty In Right Of Canada As Represented By The Minister Of Industry Adaptive predistorter based on the probability distribution function of the output amplitude
JP4071526B2 (en) 2002-04-10 2008-04-02 松下電器産業株式会社 Nonlinear distortion compensation apparatus and transmission apparatus
US8380143B2 (en) 2002-05-01 2013-02-19 Dali Systems Co. Ltd Power amplifier time-delay invariant predistortion methods and apparatus
US6985704B2 (en) 2002-05-01 2006-01-10 Dali Yang System and method for digital memorized predistortion for wireless communication
US8472897B1 (en) 2006-12-22 2013-06-25 Dali Systems Co. Ltd. Power amplifier predistortion methods and apparatus
US8811917B2 (en) 2002-05-01 2014-08-19 Dali Systems Co. Ltd. Digital hybrid mode power amplifier system
JP2003347854A (en) 2002-05-29 2003-12-05 Matsushita Electric Ind Co Ltd Power amplifier
US6831901B2 (en) 2002-05-31 2004-12-14 Opencell Corporation System and method for retransmission of data
WO2003103167A1 (en) 2002-05-31 2003-12-11 富士通株式会社 Table reference predistortor
KR100448892B1 (en) 2002-06-04 2004-09-18 한국전자통신연구원 Apparatus and Method for Pre-distortion for Nonlinear Distortion of High Power Amplifier
JP2004015364A (en) 2002-06-06 2004-01-15 Fujitsu Ltd Transmitter with distortion compensation function and method for adjusting distortion compensation timing
US7139327B2 (en) 2002-06-10 2006-11-21 Andrew Corporation Digital pre-distortion of input signals for reducing spurious emissions in communication networks
US7493094B2 (en) 2005-01-19 2009-02-17 Micro Mobio Corporation Multi-mode power amplifier module for wireless communication devices
KR100486547B1 (en) 2002-12-18 2005-05-03 엘지전자 주식회사 A device and a operating method of pre-distorter with compensation for power amplifier
US7034612B2 (en) 2002-07-20 2006-04-25 Lg Electronics Inc. Apparatus and method for compensating pre-distortion of a power amplifier
US7113551B2 (en) 2002-07-25 2006-09-26 Intersil Corporation Transmitter with limited spectral regrowth and method therefor
US7321635B2 (en) 2002-08-16 2008-01-22 Andrew Corporation Linearization of amplifiers using baseband detection and non-baseband pre-distortion
US7493129B1 (en) 2002-09-12 2009-02-17 At&T Mobility Ii Llc Method and apparatus to maintain network coverage when using a transport media to communicate with a remote antenna
US20040053624A1 (en) 2002-09-17 2004-03-18 Frank Ed H. Method and system for optimal load balancing in a hybrid wired/wireless network
JP4546711B2 (en) 2002-10-07 2010-09-15 パナソニック株式会社 Communication device
US7151913B2 (en) 2003-06-30 2006-12-19 M/A-Com, Inc. Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
JP4124710B2 (en) 2002-10-17 2008-07-23 松下電器産業株式会社 Wireless communication system
JP2004147009A (en) 2002-10-23 2004-05-20 Hitachi Kokusai Electric Inc Relay amplifying device
AU2002344035A1 (en) * 2002-10-31 2004-05-25 Zte Corporation A method and system for broadband predistortion linearizaion
US7047028B2 (en) 2002-11-15 2006-05-16 Telefonaktiebolaget Lm Ericsson (Publ) Optical fiber coupling configurations for a main-remote radio base station and a hybrid radio base station
US7206355B2 (en) 2002-12-02 2007-04-17 Nortel Networks Limited Digitally convertible radio
US7103377B2 (en) 2002-12-03 2006-09-05 Adc Telecommunications, Inc. Small signal threshold and proportional gain distributed digital communications
US8958789B2 (en) 2002-12-03 2015-02-17 Adc Telecommunications, Inc. Distributed digital antenna system
US6785558B1 (en) 2002-12-06 2004-08-31 Lgc Wireless, Inc. System and method for distributing wireless communication signals over metropolitan telecommunication networks
KR100480278B1 (en) 2002-12-24 2005-04-07 삼성전자주식회사 Digital predistorter of a wideband power amplifier and adaptation method therefor
WO2004059934A1 (en) 2002-12-24 2004-07-15 Pirelli & C. S.P.A. Radio base station receiver having digital filtering and reduced sampling frequency
US7403573B2 (en) 2003-01-15 2008-07-22 Andrew Corporation Uncorrelated adaptive predistorter
US20040142667A1 (en) 2003-01-21 2004-07-22 Lochhead Donald Laird Method of correcting distortion in a power amplifier
US7295819B2 (en) 2003-03-11 2007-11-13 Andrew Corporation Signal sample acquisition techniques
US7123890B2 (en) 2003-03-11 2006-10-17 Andrew Corporation Signal sample acquisition techniques
US6975222B2 (en) 2003-03-21 2005-12-13 Baldev Krishan Asset tracking apparatus and method
US6922102B2 (en) 2003-03-28 2005-07-26 Andrew Corporation High efficiency amplifier
US7349490B2 (en) * 2003-04-16 2008-03-25 Powerwave Technologies, Inc. Additive digital predistortion system employing parallel path coordinate conversion
US7038539B2 (en) 2003-05-06 2006-05-02 Powerwave Technologies, Inc. RF amplifier employing active load linearization
US7251293B2 (en) 2003-06-27 2007-07-31 Andrew Corporation Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics
JP2005020675A (en) 2003-06-30 2005-01-20 Maruko & Co Ltd Digital quadrature convertor
US7302278B2 (en) 2003-07-03 2007-11-27 Rotani, Inc. Method and apparatus for high throughput multiple radio sectorized wireless cell
US7068101B2 (en) 2003-07-03 2006-06-27 Icefyre Semiconductor Corporation Adaptive predistortion for a transmit system
JP4356384B2 (en) 2003-07-09 2009-11-04 日本電気株式会社 Nonlinear compensation circuit, transmitter, and nonlinear compensation method
KR100546245B1 (en) 2003-07-10 2006-01-26 단암전자통신주식회사 Apparatus and method for power amplifying using predistortion and radio communication system having the apparatus
US7801038B2 (en) 2003-07-14 2010-09-21 Siemens Corporation Method and apparatus for providing a delay guarantee for a wireless network
US7042287B2 (en) 2003-07-23 2006-05-09 Northrop Grumman Corporation System and method for reducing dynamic range and improving linearity in an amplication system
US7259630B2 (en) 2003-07-23 2007-08-21 Andrew Corporation Elimination of peak clipping and improved efficiency for RF power amplifiers with a predistorter
CN100505588C (en) 2003-07-26 2009-06-24 华为技术有限公司 An optical fibre transmission system and implementing method of optical fibre transmission thereof and terminal processing device
JP4093937B2 (en) 2003-08-21 2008-06-04 富士通株式会社 Optical transmission system
US20050143091A1 (en) 2003-09-02 2005-06-30 Yair Shapira Indoor location identification system
US7149482B2 (en) 2003-09-16 2006-12-12 Andrew Corporation Compensation of filters in radio transmitters
US7109792B2 (en) 2003-09-17 2006-09-19 Andrew Corporation Table-based pre-distortion for amplifier systems
JP4394409B2 (en) * 2003-09-25 2010-01-06 株式会社日立国際電気 Predistortion type amplifier with distortion compensation function
SE0302596D0 (en) 2003-09-30 2003-09-30 Ericsson Telefon Ab L M Improvements in or relating to base stations
US7372918B2 (en) 2003-09-30 2008-05-13 Infineon Technologies Ag Transmission device with adaptive digital predistortion, transceiver with transmission device, and method for operating a transmission device
US20100067906A1 (en) 2003-10-02 2010-03-18 Balluff Gmbh Bandwidth allocation and management system for cellular networks
US7023273B2 (en) 2003-10-06 2006-04-04 Andrew Corporation Architecture and implementation methods of digital predistortion circuitry
JP2005150932A (en) 2003-11-12 2005-06-09 Hitachi Kokusai Electric Inc Predistortion device
KR20050052556A (en) 2003-11-28 2005-06-03 삼성전자주식회사 Multipath power amplifier using hybrid combiner
US7071777B2 (en) 2003-12-02 2006-07-04 Motorola, Inc. Digital memory-based predistortion technique
KR101058733B1 (en) 2004-01-02 2011-08-22 삼성전자주식회사 Precompensation Device Compensates for Nonlinear Distortion Characteristics of Power Amplifiers
EP1553791B1 (en) * 2004-01-08 2007-06-13 Evolium S.A.S. Radio base station with multiple radio frequency heads
US20050157675A1 (en) 2004-01-16 2005-07-21 Feder Peretz M. Method and apparatus for cellular communication over data networks
US7366252B2 (en) 2004-01-21 2008-04-29 Powerwave Technologies, Inc. Wideband enhanced digital injection predistortion system and method
US8010073B2 (en) 2004-01-22 2011-08-30 Broadcom Corporation System and method for adjusting power amplifier output power in linear dB steps
US7469491B2 (en) 2004-01-27 2008-12-30 Crestcom, Inc. Transmitter predistortion circuit and method therefor
JP4255849B2 (en) 2004-01-29 2009-04-15 株式会社エヌ・ティ・ティ・ドコモ Power series digital predistorter
JP4467319B2 (en) 2004-01-29 2010-05-26 株式会社日立国際電気 Predistorter
CN100341292C (en) 2004-02-02 2007-10-03 华为技术有限公司 Distributed substation network combining method
WO2005076495A1 (en) * 2004-02-09 2005-08-18 Sige Semiconductor Inc. Methods of enhancing power amplifier linearity
CN100542345C (en) 2004-02-11 2009-09-16 三星电子株式会社 The method of operating TDD/virtual FDD hierarchical cellular telecommunication system
JP2005229268A (en) 2004-02-12 2005-08-25 Renesas Technology Corp High frequency power amplifier circuit and radio communication system
FI20040220A0 (en) 2004-02-12 2004-02-12 Nokia Corp Identification of remote radio devices in a communication system
US6998909B1 (en) * 2004-02-17 2006-02-14 Altera Corporation Method to compensate for memory effect in lookup table based digital predistorters
EP1566979A1 (en) 2004-02-23 2005-08-24 Siemens Aktiengesellschaft Multiple use of a standardized interface in an apparatus
US7577211B2 (en) 2004-03-01 2009-08-18 Powerwave Technologies, Inc. Digital predistortion system and method for linearizing an RF power amplifier with nonlinear gain characteristics and memory effects
US7336725B2 (en) 2004-03-03 2008-02-26 Powerwave Technologies, Inc. Digital predistortion system and method for high efficiency transmitters
US7312750B2 (en) 2004-03-19 2007-12-25 Comware, Inc. Adaptive beam-forming system using hierarchical weight banks for antenna array in wireless communication system
CN100442879C (en) 2004-03-29 2008-12-10 Ut斯达康通讯有限公司 Method of regulating resource and guiding service in the multi-mode radio network
JP4520204B2 (en) 2004-04-14 2010-08-04 三菱電機株式会社 High frequency power amplifier
CN100452891C (en) 2004-04-22 2009-01-14 Ut斯达康通讯有限公司 Distributed wireless system for controlling the resource centrally
CN1926896B (en) 2004-04-23 2010-05-26 Ut斯达康通讯有限公司 Method and apparatus for multi-antanna signal transmission in RF long-distance wireless BS
US7102442B2 (en) 2004-04-28 2006-09-05 Sony Ericsson Mobile Communications Ab Wireless terminals, methods and computer program products with transmit power amplifier input power regulation
KR101126401B1 (en) 2004-05-11 2012-03-29 삼성전자주식회사 Digital Predistortion Apparatus and Method in Power Amplifier
JP4417174B2 (en) * 2004-05-19 2010-02-17 株式会社日立国際電気 Predistorter
US7676804B2 (en) 2004-05-20 2010-03-09 Caterpillar Inc. Systems and method for remotely modifying software on a work machine
EP1750376B1 (en) 2004-06-14 2015-10-21 Panasonic Intellectual Property Management Co., Ltd. Radio communication device
WO2006005229A1 (en) 2004-07-13 2006-01-19 Utstarcom Telecom Co., Ltd. Method for transmitting packet of wireless signal in radio base station
WO2006005228A1 (en) 2004-07-13 2006-01-19 Utstarcom Telecom Co., Ltd. A interfacing method between remote unit and centralized bs
US7113037B2 (en) 2004-07-14 2006-09-26 Raytheon Company Performing remote power amplifier linearization
US7151405B2 (en) 2004-07-14 2006-12-19 Raytheon Company Estimating power amplifier non-linearity in accordance with memory depth
US20080031380A1 (en) 2004-08-30 2008-02-07 Shinichiro Takabayashi Peak Power Suppressing Apparatus and Peak Power Supressing Method
JP4214098B2 (en) 2004-09-09 2009-01-28 株式会社ルネサステクノロジ Sigma delta transmission circuit and transceiver using the same
US7463697B2 (en) 2004-09-28 2008-12-09 Intel Corporation Multicarrier transmitter and methods for generating multicarrier communication signals with power amplifier predistortion and linearization
CN101107871B (en) 2004-10-12 2011-11-09 Lm爱立信电话有限公司 Interface, device and method for communication between a radio equipment control node and multiple remote radio equipment nodes
DE602004018399D1 (en) * 2004-10-25 2009-01-22 Pirelli & C Spa COMMUNICATION PROCESS, ESPECIALLY FOR A MOBILE RADIO NETWORK
US7313415B2 (en) 2004-11-01 2007-12-25 Nextg Networks, Inc. Communications system and method
US7362776B2 (en) 2004-11-01 2008-04-22 Cisco Technology, Inc. Method for multicast load balancing in wireless LANs
CN1774094A (en) 2004-11-08 2006-05-17 华为技术有限公司 A radio base station system and its transmitting and receiving information method
US8527003B2 (en) 2004-11-10 2013-09-03 Newlans, Inc. System and apparatus for high data rate wireless communications
US7433668B2 (en) 2004-12-23 2008-10-07 Lucent Technologies Inc. Controlling Q-factor of filters
US7104310B2 (en) 2004-12-27 2006-09-12 Hunter Automated Machinery Corporation Mold making machine with separated safety work zones
CN100426897C (en) 2005-01-12 2008-10-15 华为技术有限公司 Separated base station system and its networking method and baseband unit
US7787854B2 (en) 2005-02-01 2010-08-31 Adc Telecommunications, Inc. Scalable distributed radio network
WO2006087864A1 (en) * 2005-02-17 2006-08-24 Hitachi Kokusai Electric Inc. Predistorter
JP4683468B2 (en) 2005-03-22 2011-05-18 ルネサスエレクトロニクス株式会社 High frequency power amplifier circuit
US7193462B2 (en) 2005-03-22 2007-03-20 Powerwave Technologies, Inc. RF power amplifier system employing an analog predistortion module using zero crossings
DE102005013881A1 (en) 2005-03-24 2006-09-28 Infineon Technologies Ag Signal processing method for portable radio involves amplifying carrier signal after amplitude of carrier signal is modulated based on distorted first component or first component
US7474891B2 (en) 2005-03-31 2009-01-06 Adc Telecommunications, Inc. Dynamic digital up and down converters
US7423988B2 (en) 2005-03-31 2008-09-09 Adc Telecommunications, Inc. Dynamic reconfiguration of resources through page headers
US7640019B2 (en) 2005-03-31 2009-12-29 Adc Telecommunications, Inc. Dynamic reallocation of bandwidth and modulation protocols
CN101444121B (en) 2005-03-31 2012-07-25 意大利电信股份公司 Radio access method for mobile radio network, relevant network and computer program product
WO2006102919A1 (en) 2005-03-31 2006-10-05 Telecom Italia S.P.A. A radio-access method, related radio base station, mobile-radio network and computer-program product using an assignment scheme for antennas’ sectors
US7398106B2 (en) 2005-03-31 2008-07-08 Adc Telecommunications, Inc. Dynamic readjustment of power
US7688792B2 (en) 2005-04-21 2010-03-30 Qualcomm Incorporated Method and apparatus for supporting wireless data services on a TE2 device using an IP-based interface
CN100576724C (en) * 2005-05-18 2009-12-30 株式会社Ntt都科摩 Power series predistorter and control method thereof
US7499682B2 (en) 2005-05-24 2009-03-03 Skyworks Solutions, Inc. Dual voltage regulator for a supply voltage controlled power amplifier in a closed power control loop
US7603141B2 (en) 2005-06-02 2009-10-13 Qualcomm, Inc. Multi-antenna station with distributed antennas
JP2006340166A (en) 2005-06-03 2006-12-14 Nippon Dengyo Kosaku Co Ltd Distortion compensation amplifier
CN100527602C (en) 2005-06-06 2009-08-12 株式会社Ntt都科摩 Power series type predistorter for multi-frequency bands operation
US8112094B1 (en) 2005-06-09 2012-02-07 At&T Mobility Ii Llc Radio access layer management
US20070008939A1 (en) 2005-06-10 2007-01-11 Adc Telecommunications, Inc. Providing wireless coverage into substantially closed environments
JP4410158B2 (en) 2005-06-24 2010-02-03 株式会社東芝 Communication system and base unit relay device used therefor
EP1914885B1 (en) 2005-06-30 2012-03-07 Fujitsu Ltd. Power amplifier having distortion compensating circuit
DE602005002259T2 (en) 2005-06-30 2008-05-21 Ntt Docomo Inc. Apparatus and method for improved handoff in mesh networks
GB0513583D0 (en) 2005-07-01 2005-08-10 Nokia Corp A mobile communications network with multiple radio units
CN1905729A (en) 2005-07-29 2007-01-31 西门子（中国）有限公司 Method for wireless communication resource configuration in distributeel antenna system
US20070058742A1 (en) 2005-09-09 2007-03-15 Demarco Anthony Distributed antenna system using signal precursors
US20070057737A1 (en) * 2005-09-14 2007-03-15 Freescale Semiconductor, Inc. Compensation for modulation distortion
JP4634902B2 (en) 2005-09-30 2011-02-16 日本放送協会 Transmitting apparatus and program
US7286507B1 (en) 2005-10-04 2007-10-23 Sprint Spectrum L.P. Method and system for dynamically routing between a radio access network and distributed antenna system remote antenna units
US7616610B2 (en) 2005-10-04 2009-11-10 Motorola, Inc. Scheduling in wireless communication systems
US20070075780A1 (en) 2005-10-05 2007-04-05 Enver Krvavac Apparatus and method for adaptive biasing of a Doherty amplifier
CN1960231A (en) 2005-10-31 2007-05-09 Ut斯达康通讯有限公司 Multichannel multiplex transmission method and system for CPRI link
US7301402B2 (en) 2005-11-17 2007-11-27 Freescale Semiconductor, Inc. Soft saturation detection for power amplifiers
US7496367B1 (en) 2005-11-22 2009-02-24 Nortel Networks Limited Method of multi-carrier traffic allocation for wireless communication system
US7831221B2 (en) 2005-12-13 2010-11-09 Andrew Llc Predistortion system and amplifier for addressing group delay modulation
US20070274279A1 (en) 2005-12-19 2007-11-29 Wood Steven A Distributed antenna system employing digital forward deployment of wireless transmit/receive locations
KR20070069731A (en) 2005-12-28 2007-07-03 삼성전자주식회사 Apparatus and method for communication between digital unit and remote rf unit in broadband wireless communication system bts
US7813451B2 (en) 2006-01-11 2010-10-12 Mobileaccess Networks Ltd. Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting
JP2007195056A (en) 2006-01-20 2007-08-02 Matsushita Electric Ind Co Ltd Distortion compensation device and distortion compensation method
US7626591B2 (en) 2006-01-24 2009-12-01 D & S Consultants, Inc. System and method for asynchronous continuous-level-of-detail texture mapping for large-scale terrain rendering
US8195103B2 (en) 2006-02-15 2012-06-05 Texas Instruments Incorporated Linearization of a transmit amplifier
JP2007235738A (en) 2006-03-02 2007-09-13 Sumitomo Electric Ind Ltd Communication system
US20070223614A1 (en) 2006-03-23 2007-09-27 Ravi Kuchibhotla Common time frequency radio resource in wireless communication systems
US7610046B2 (en) 2006-04-06 2009-10-27 Adc Telecommunications, Inc. System and method for enhancing the performance of wideband digital RF transport systems
US7599711B2 (en) 2006-04-12 2009-10-06 Adc Telecommunications, Inc. Systems and methods for analog transport of RF voice/data communications
GB2437586A (en) 2006-04-27 2007-10-31 Motorola Inc High speed downlink packet access communication in a cellular communication system
CN101479956B (en) 2006-04-28 2013-07-31 大力系统有限公司 High efficiency linearization power amplifier for wireless communication
WO2008105775A1 (en) 2006-04-28 2008-09-04 Dali Systems Co. Ltd High efficiency linearization power amplifier for wireless communication
US7826810B2 (en) 2006-05-08 2010-11-02 Harris Corporation Multiband radio with transmitter output power optimization
US20070264947A1 (en) 2006-05-10 2007-11-15 Dmitriy Rozenblit System and method for saturation detection and compensation in a polar transmitter
JP4839133B2 (en) 2006-05-22 2011-12-21 株式会社日立製作所 Data management method and computer system for storage apparatus
US7733978B2 (en) 2006-05-26 2010-06-08 Industrial Technology Research Institute Apparatus and method of dynamically adapting the LUT spacing for linearizing a power amplifier
JP4981494B2 (en) 2006-05-30 2012-07-18 株式会社日立国際電気 Wireless communication system and overhang station apparatus
US8184549B2 (en) 2006-06-30 2012-05-22 Embarq Holdings Company, LLP System and method for selecting network egress
US20080045254A1 (en) 2006-08-15 2008-02-21 Motorola, Inc. Method and Apparatus for Maximizing Resource Utilization of Base Stations in a Communication Network
US8064391B2 (en) 2006-08-22 2011-11-22 Embarq Holdings Company, Llc System and method for monitoring and optimizing network performance to a wireless device
US7848770B2 (en) 2006-08-29 2010-12-07 Lgc Wireless, Inc. Distributed antenna communications system and methods of implementing thereof
JP2008078702A (en) 2006-09-19 2008-04-03 Fujitsu Ltd Amplifier fault detector
JP5312734B2 (en) 2006-09-20 2013-10-09 富士通株式会社 Mobile communication terminal
JP5277169B2 (en) 2006-09-22 2013-08-28 アルヴァリオン・リミテッド Wireless via PON
CN101536465B (en) 2006-09-27 2012-05-23 意大利电信股份公司 An apparatus and method for implementing configurable resource management policies
US7778307B2 (en) 2006-10-04 2010-08-17 Motorola, Inc. Allocation of control channel for radio resource assignment in wireless communication systems
JP4791320B2 (en) 2006-10-13 2011-10-12 富士通株式会社 A circuit detour using the vendor-specific area of the common public radio interface (CPRI)
US7583677B1 (en) 2006-11-03 2009-09-01 Juniper Networks, Inc. Dynamic flow-based multi-path load balancing with quality of service assurances
EP1924109B1 (en) 2006-11-20 2013-11-06 Alcatel Lucent Method and system for wireless cellular indoor communications
JP2008135955A (en) 2006-11-28 2008-06-12 Toshiba Corp Rof system and slave device installation method
FI20065783A0 (en) 2006-12-08 2006-12-08 Nokia Corp Signal pre-distortion in radio transmitters
CN102017553B (en) 2006-12-26 2014-10-15 大力系统有限公司 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
US9026067B2 (en) 2007-04-23 2015-05-05 Dali Systems Co. Ltd. Remotely reconfigurable power amplifier system and method
US8374271B2 (en) 2007-01-08 2013-02-12 Cisco Technology, Inc. Method and system for resizing a MIMO channel
US20080181182A1 (en) 2007-01-12 2008-07-31 Scott Carichner Digital radio head system and method
US8737454B2 (en) 2007-01-25 2014-05-27 Adc Telecommunications, Inc. Modular wireless communications platform
US8583100B2 (en) 2007-01-25 2013-11-12 Adc Telecommunications, Inc. Distributed remote base station system
CN101606315B (en) 2007-01-26 2014-07-02 大力系统有限公司 Power amplifier time-delay invariant predistortion methods and apparatus
US20090013317A1 (en) 2007-02-08 2009-01-08 Airnet Communications Corporation Software Management for Software Defined Radio in a Distributed Network
WO2008099383A2 (en) 2007-02-12 2008-08-21 Mobileaccess Networks Ltd. Mimo-adapted distributed antenna system
US20080240286A1 (en) 2007-03-26 2008-10-02 Innofidei, Inc. Signal transmission system, method and apparatus
JP5591106B2 (en) 2007-04-23 2014-09-17 ダリ システムズ カンパニー リミテッド Digital hybrid mode power amplifier system
US8274332B2 (en) 2007-04-23 2012-09-25 Dali Systems Co. Ltd. N-way Doherty distributed power amplifier with power tracking
JP5040998B2 (en) 2007-05-31 2012-10-03 富士通株式会社 Radio base station apparatus and link disconnection relief method in radio base station apparatus
WO2008155764A2 (en) 2007-06-18 2008-12-24 Duolink Ltd. Wireless network architecture and method for base station utilization
US8010116B2 (en) 2007-06-26 2011-08-30 Lgc Wireless, Inc. Distributed antenna communications system
US8964532B2 (en) 2007-06-29 2015-02-24 Alcatel Lucent Wireless communication device including a standby radio
US7702300B1 (en) 2007-07-12 2010-04-20 Panasonic Corporation Envelope modulator saturation detection using a DC-DC converter
US20090019664A1 (en) 2007-07-20 2009-01-22 Kwin Abram Square bushing for exhaust valve
US8369809B2 (en) 2007-07-27 2013-02-05 Netlogic Microsystems, Inc. Crest factor reduction
JP2009038688A (en) 2007-08-03 2009-02-19 Furuno Electric Co Ltd Radio apparatus
US8290088B2 (en) * 2007-08-07 2012-10-16 Research In Motion Limited Detecting the number of transmit antennas in a base station
WO2009023302A2 (en) 2007-08-14 2009-02-19 Rambus Inc. Communication using continuous-phase modulated signals
US7948897B2 (en) 2007-08-15 2011-05-24 Adc Telecommunications, Inc. Delay management for distributed communications networks
US20090060496A1 (en) 2007-08-31 2009-03-05 Liu David H Method and system for enabling diagnosing of faults in a passive optical network
US8010099B2 (en) 2007-09-04 2011-08-30 Alcatel Lucent Methods of reconfiguring sector coverage in in-building communications system
CN101394647B (en) 2007-09-21 2013-10-02 电信科学技术研究院 Method and system for realizing cell networking
US8103267B2 (en) 2007-09-26 2012-01-24 Via Telecom, Inc. Femtocell base station with mobile station capability
FI20075690A0 (en) 2007-10-01 2007-10-01 Nokia Corp Signal pre-distortion in radio transmitters
WO2009044337A1 (en) 2007-10-01 2009-04-09 St Wireless Sa Correlation-driven adaptation of frequency control for a rf receiver device
US8478331B1 (en) 2007-10-23 2013-07-02 Clearwire Ip Holdings Llc Method and system for transmitting streaming media content to wireless subscriber stations
JP5252881B2 (en) * 2007-11-02 2013-07-31 株式会社エヌ・ティ・ティ・ドコモ Base station and method used in mobile communication system
JP5256298B2 (en) 2007-11-21 2013-08-07 テレフオンアクチーボラゲット エル エム エリクソン（パブル） Method and radio base station in communication system
CN201127027Y (en) 2007-11-30 2008-10-01 京信通信系统（中国）有限公司 Multiple-carrier digital frequency-selecting radio frequency extension system
CN101453799B (en) 2007-11-30 2010-05-19 京信通信系统（中国）有限公司 Multi-carrier digital frequency-selection radio frequency pulling system and signal processing method thereof
US7598907B2 (en) 2007-12-06 2009-10-06 Kyocera Corporation System and method for WWAN/WLAN position estimation
US8213884B2 (en) 2007-12-07 2012-07-03 Dali System Co. Ltd. Baseband-derived RF digital predistortion
CN101459913B (en) 2007-12-12 2010-10-27 华为技术有限公司 Wireless communication system, central station, access equipment and communication method
JP5017072B2 (en) 2007-12-13 2012-09-05 キヤノン株式会社 Image processing apparatus, control method thereof, and program
WO2009081376A2 (en) 2007-12-20 2009-07-02 Mobileaccess Networks Ltd. Extending outdoor location based services and applications into enclosed areas
US8165100B2 (en) 2007-12-21 2012-04-24 Powerwave Technologies, Inc. Time division duplexed digital distributed antenna system
US8855036B2 (en) 2007-12-21 2014-10-07 Powerwave Technologies S.A.R.L. Digital distributed antenna system
US9385804B2 (en) 2008-01-15 2016-07-05 Intel Deutschland Gmbh Transmission unit and a method for transmitting data
GB0800767D0 (en) 2008-01-16 2008-02-27 Nec Corp A method for controlling access to a mobile communications network
US8666428B2 (en) 2008-01-29 2014-03-04 Alcatel Lucent Method to support user location in in-structure coverage systems
WO2009100396A1 (en) 2008-02-08 2009-08-13 Adc Telecommunications, Inc. An enterprise mobile network for providing cellular wireless service using licensed radio frequency spectrum and internet protocol backhaul
KR20090088083A (en) 2008-02-14 2009-08-19 삼성전자주식회사 Apparatus and method for user selection in distributed antenna system
FI20085158A0 (en) 2008-02-21 2008-02-21 Nokia Corp Apparatus and method
CN101521893B (en) 2008-02-25 2010-12-01 京信通信系统（中国）有限公司 Wideband digital frequency selecting and radiating pulling system and signal processing method thereof
US8204544B2 (en) 2008-03-27 2012-06-19 Rockstar Bidco, LP Agile remote radio head
US8428077B2 (en) 2008-03-31 2013-04-23 Qualcomm Incorporated Methods and apparatus for dynamic load balancing with E-AICH
US9049687B2 (en) 2008-05-05 2015-06-02 Industrial Technology Research Institute System and method for providing multicast and/or broadcast services
US20090286484A1 (en) 2008-05-19 2009-11-19 Lgc Wireless, Inc. Method and system for performing onsite maintenance of wireless communication systems
US8005152B2 (en) 2008-05-21 2011-08-23 Samplify Systems, Inc. Compression of baseband signals in base transceiver systems
JP5090258B2 (en) 2008-06-05 2012-12-05 日本電信電話株式会社 Wireless access system, terminal station apparatus, and wireless access method
TWI372531B (en) 2008-06-10 2012-09-11 Ind Tech Res Inst Wireless network, access point, and load balancing method thereof
US8208414B2 (en) 2008-06-24 2012-06-26 Lgc Wireless, Inc. System and method for configurable time-division duplex interface
KR101511786B1 (en) * 2008-06-30 2015-04-14 엘지전자 주식회사 Wireless communication system having frequency division duplex relay station and method for utilizing radio resources for the wireless communication system
EP2294860B1 (en) * 2008-07-03 2017-04-19 Telefonaktiebolaget LM Ericsson (publ) A method and apparatus for supporting fast carrier reselection
CN101621806B (en) 2008-07-04 2011-09-21 京信通信系统（中国）有限公司 Intelligent carrier scheduling method applied to GSM network
KR100969741B1 (en) 2008-07-11 2010-07-13 엘지노텔 주식회사 Optical communication system for providing ring hybrided star network
US7855977B2 (en) 2008-08-01 2010-12-21 At&T Mobility Ii Llc Alarming in a femto cell network
CN201307942Y (en) 2008-09-17 2009-09-09 京信通信系统（中国）有限公司 Wireless zone center where RRH (remote radio head) systems realize covering
US8229416B2 (en) 2008-09-23 2012-07-24 Ixia Methods, systems, and computer readable media for stress testing mobile network equipment using a common public radio interface (CPRI)
US20100087227A1 (en) 2008-10-02 2010-04-08 Alvarion Ltd. Wireless base station design
WO2010043752A1 (en) 2008-10-16 2010-04-22 Elektrobit Wireless Communications Oy Beam forming method, apparatus and system
US9826409B2 (en) 2008-10-24 2017-11-21 Qualcomm Incorporated Adaptive semi-static interference avoidance in cellular networks
KR101481421B1 (en) 2008-11-03 2015-01-21 삼성전자주식회사 Method and apparatus for managing white list information for user equipment in mobile telecommunication system
US8385483B2 (en) 2008-11-11 2013-02-26 Isco International, Llc Self-adaptive digital RF bandpass and bandstop filter architecture
TW201021473A (en) 2008-11-21 2010-06-01 Inventec Appliances Corp A master-slave system for mobile communications and a domain login method therefor
US20100128676A1 (en) 2008-11-24 2010-05-27 Dong Wu Carrier Channel Distribution System
CN101754229B (en) 2008-11-28 2012-10-24 京信通信系统（中国）有限公司 Communication overlay system for dynamic dispatching of carrier channel
CN101754431B (en) 2008-12-01 2012-07-04 中国移动通信集团天津有限公司 Special wireless network system, device and signal transmission and switching method
CN101453699B (en) 2008-12-30 2012-04-25 华为技术有限公司 Advertisement playing method and user terminal
US8346278B2 (en) 2009-01-13 2013-01-01 Adc Telecommunications, Inc. Systems and methods for mobile phone location with digital distributed antenna systems
US8213401B2 (en) 2009-01-13 2012-07-03 Adc Telecommunications, Inc. Systems and methods for IP communication over a distributed antenna system transport
US8270387B2 (en) 2009-01-13 2012-09-18 Adc Telecommunications, Inc. Systems and methods for improved digital RF transport in distributed antenna systems
JP5216604B2 (en) 2009-01-19 2013-06-19 株式会社日立国際電気 Wireless device
US8467355B2 (en) 2009-01-22 2013-06-18 Belair Networks Inc. System and method for providing wireless local area networks as a service
KR101562518B1 (en) 2009-01-22 2015-10-23 삼성전자주식회사 Communication system and method for redirecting of femto cell therein
WO2010087031A1 (en) 2009-01-30 2010-08-05 株式会社日立製作所 Wireless communication system and communication control method
US8098572B2 (en) 2009-02-03 2012-01-17 Google Inc. Interface monitoring for link aggregation
US20130153298A1 (en) 2009-02-19 2013-06-20 Interdigital Patent Holdings, Inc. Method and apparatus for enhancing cell-edge user performance and signaling radio link failure conditions via downlink cooperative component carriers
US7826369B2 (en) 2009-02-20 2010-11-02 Cisco Technology, Inc. Subsets of the forward information base (FIB) distributed among line cards in a switching device
KR101770822B1 (en) 2009-02-22 2017-08-24 엘지전자 주식회사 Method and apparatus of transmitting inter-working signal in wireless communicatinon system
ES2415706T3 (en) 2009-03-12 2013-07-26 Alcatel Lucent Antenna synchronization for MIMO in coherent networks
US8472965B2 (en) * 2009-03-17 2013-06-25 Qualcomm Incorporated Mobility in multi-carrier high speed packet access
US8606321B2 (en) 2009-04-09 2013-12-10 Alcatel Lucent High-selectivity low noise receiver front end
US8422885B2 (en) 2009-04-16 2013-04-16 Trex Enterprises Corp Bandwidth allocation and management system for cellular networks
US9432991B2 (en) 2009-04-21 2016-08-30 Qualcomm Incorporated Enabling support for transparent relays in wireless communication
US9154352B2 (en) 2009-04-21 2015-10-06 Qualcomm Incorporated Pre-communication for relay base stations in wireless communication
US8849190B2 (en) 2009-04-21 2014-09-30 Andrew Llc Radio communication systems with integrated location-based measurements for diagnostics and performance optimization
US8289910B2 (en) 2009-04-24 2012-10-16 Kathrein-Werke Kg Device for receiving and transmitting mobile telephony signals with multiple transmit-receive branches
EP2430531B1 (en) 2009-04-24 2019-12-04 Dali Systems Co. Ltd. Remotely reconfigurable power amplifier system and method
US8346091B2 (en) 2009-04-29 2013-01-01 Andrew Llc Distributed antenna system for wireless network systems
ITMO20090135A1 (en) 2009-05-19 2010-11-20 Teko Telecom S P A SYSTEM AND METHOD FOR THE DISTRIBUTION OF RADIOFREQUENCY SIGNALS
US8812347B2 (en) 2009-05-21 2014-08-19 At&T Mobility Ii Llc Aggregating and capturing subscriber traffic
US8588614B2 (en) 2009-05-22 2013-11-19 Extenet Systems, Inc. Flexible distributed antenna system
WO2010133043A1 (en) 2009-05-22 2010-11-25 华为技术有限公司 Method for dispatching multi sub-frames and the system, the terminal and the base station thereof
US20100304773A1 (en) 2009-05-27 2010-12-02 Ramprashad Sean A Method for selective antenna activation and per antenna or antenna group power assignments in cooperative signaling wireless mimo systems
US8139492B1 (en) 2009-06-09 2012-03-20 Juniper Networks, Inc. Local forwarding bias in a multi-chassis router
US8811925B2 (en) 2009-06-10 2014-08-19 Clearwire Ip Holdings Llc System and method for providing external receiver gain compensation when using an antenna with a pre-amplifier
EP2443908B1 (en) 2009-06-19 2018-07-04 China Academy of Telecommunications Technology Remote radio data transmission over ethernet
US8634313B2 (en) * 2009-06-19 2014-01-21 Qualcomm Incorporated Method and apparatus that facilitates a timing alignment in a multicarrier system
TWI372882B (en) 2009-06-23 2012-09-21 Univ Nat Chiao Tung The gps tracking system
US20110069657A1 (en) 2009-09-09 2011-03-24 Qualcomm Incorporated System and method for the simultaneous transmission and reception of flo and flo-ev data over a multi-frequency network
US8451735B2 (en) 2009-09-28 2013-05-28 Symbol Technologies, Inc. Systems and methods for dynamic load balancing in a wireless network
CN102044736B (en) 2009-10-14 2015-05-20 中兴通讯股份有限公司 Radio remote unit
US20110103309A1 (en) 2009-10-30 2011-05-05 Interdigital Patent Holdings, Inc. Method and apparatus for concurrently processing multiple radio carriers
EP2517353B1 (en) 2009-12-21 2016-04-20 Dali Systems Co. Ltd. Modulation agnostic digital hybrid mode power amplifier system and method
US8351877B2 (en) 2010-12-21 2013-01-08 Dali Systems Co. Ltfd. Multi-band wideband power amplifier digital predistorition system and method
US8542768B2 (en) 2009-12-21 2013-09-24 Dali Systems Co. Ltd. High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications
US8320866B2 (en) 2010-02-11 2012-11-27 Mediatek Singapore Pte. Ltd. Integrated circuits, communication units and methods of cancellation of intermodulation distortion
US20110223958A1 (en) 2010-03-10 2011-09-15 Fujitsu Limited System and Method for Implementing Power Distribution
US8467823B2 (en) 2010-03-24 2013-06-18 Fujitsu Limited Method and system for CPRI cascading in distributed radio head architectures
US8681917B2 (en) 2010-03-31 2014-03-25 Andrew Llc Synchronous transfer of streaming data in a distributed antenna system
US8935543B2 (en) 2010-04-02 2015-01-13 Andrew Llc Method and apparatus for distributing power over communication cabling
US8559485B2 (en) 2010-04-08 2013-10-15 Andrew Llc Autoregressive signal processing for repeater echo cancellation
US8346160B2 (en) 2010-05-12 2013-01-01 Andrew Llc System and method for detecting and measuring uplink traffic in signal repeating systems
US9125068B2 (en) 2010-06-04 2015-09-01 Ixia Methods, systems, and computer readable media for simulating realistic movement of user equipment in a long term evolution (LTE) network
US20110302390A1 (en) 2010-06-05 2011-12-08 Greg Copeland SYSTEMS AND METHODS FOR PROCESSING COMMUNICATIONS SIGNALS fUSING PARALLEL PROCESSING
WO2011156465A1 (en) 2010-06-09 2011-12-15 Andrew Llc Uplink noise minimization
US20110310881A1 (en) 2010-06-17 2011-12-22 Peter Kenington Remote radio head
US8774109B2 (en) 2010-06-17 2014-07-08 Kathrein-Werke Kg Mobile communications network with distributed processing resources
US8630211B2 (en) 2010-06-30 2014-01-14 Qualcomm Incorporated Hybrid radio architecture for repeaters using RF cancellation reference
US20140126914A1 (en) 2010-07-09 2014-05-08 Corning Cable Systems Llc Optical fiber-based distributed radio frequency (rf) antenna systems supporting multiple-input, multiple-output (mimo) configurations, and related components and methods
US8570914B2 (en) 2010-08-09 2013-10-29 Corning Cable Systems Llc Apparatuses, systems, and methods for determining location of a mobile device(s) in a distributed antenna system(s)
CN107682021B (en) 2010-08-17 2020-02-18 大力系统有限公司 Remotely reconfigurable remote radio head unit
EP2606576B1 (en) 2010-08-17 2024-01-17 Dali Systems Co. Ltd. Daisy-chained ring of remote units for a distributed antenna system
JP5859538B2 (en) 2010-08-17 2016-02-10 ダリ システムズ カンパニー リミテッド Remotely reconfigurable distributed antenna system and distributed antenna method
US8649388B2 (en) 2010-09-02 2014-02-11 Integrated Device Technology, Inc. Transmission of multiprotocol data in a distributed antenna system
KR102136940B1 (en) 2010-09-14 2020-07-23 달리 시스템즈 씨오. 엘티디. Remotely Reconfigurable Distributed Antenna System and Methods
US8532242B2 (en) 2010-10-27 2013-09-10 Adc Telecommunications, Inc. Distributed antenna system with combination of both all digital transport and hybrid digital/analog transport
CN107018055B (en) 2011-02-07 2020-06-05 大力系统有限公司 Digital remote unit in distributed antenna system
US9439242B2 (en) 2012-08-13 2016-09-06 Dali Systems Co., Ltd. Time synchronized routing in a distributed antenna system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121412A (en) * 1989-01-03 1992-06-09 Motorola, Inc. All-digital quadrature modulator
US5963549A (en) * 1997-12-10 1999-10-05 L-3 Communications Corporation Fixed wireless loop system having baseband combiner predistortion summing table
US6963242B2 (en) * 2003-07-31 2005-11-08 Andrew Corporation Predistorter for phase modulated signals with low peak to average ratios

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