CA2169961A1 - Interference Suppression in CDMA Systems - Google Patents

Interference Suppression in CDMA Systems

Info

Publication number
CA2169961A1
CA2169961A1 CA2169961A CA2169961A CA2169961A1 CA 2169961 A1 CA2169961 A1 CA 2169961A1 CA 2169961 A CA2169961 A CA 2169961A CA 2169961 A CA2169961 A CA 2169961A CA 2169961 A1 CA2169961 A1 CA 2169961A1
Authority
CA
Canada
Prior art keywords
channel signal
cdma
demodulate
matched filter
conventional matched
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2169961A
Other languages
French (fr)
Other versions
CA2169961C (en
Inventor
Michael Latham Honig
Upamanyu Madhow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iconectiv LLC
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of CA2169961A1 publication Critical patent/CA2169961A1/en
Application granted granted Critical
Publication of CA2169961C publication Critical patent/CA2169961C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means

Abstract

Circuitry and concomitant methodology for demodulating Direct-Sequence, Spread-Spectrum Code-Division Multiple-Access (DS/SS
CDMA) channel signal using multiple samples per transmitted symbol and a minimum mean squared error criterion to suppress interference.
In one embodiment, a bank of cyclically shifted filters (502) determined with reference to the conventional matched filter (401) for CDMA
is used to demodulate the channel signal. In another embodiment, a bank of sub-filters (601, 602) determined with reference to the conventional matched filter (401) for CDMA is employed to demodulate the channel signal. In yet another embodiment, the output of a conventional matched filter is oversampled to demodulate the channel signal. Each embodiment utilizes a set of adaptive coefficients selected to minimize the mean square error between the transmitted symbol and detected symbol.
CA002169961A 1993-09-24 1994-09-15 Interference suppression in cdma systems Expired - Fee Related CA2169961C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US127,384 1993-09-24
US08/127,384 US5343496A (en) 1993-09-24 1993-09-24 Interference suppression in CDMA systems

Publications (2)

Publication Number Publication Date
CA2169961A1 true CA2169961A1 (en) 1995-03-30
CA2169961C CA2169961C (en) 1999-02-23

Family

ID=22429822

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002169961A Expired - Fee Related CA2169961C (en) 1993-09-24 1994-09-15 Interference suppression in cdma systems

Country Status (5)

Country Link
US (1) US5343496A (en)
EP (1) EP0720799A4 (en)
JP (1) JPH08510606A (en)
CA (1) CA2169961C (en)
WO (1) WO1995008890A1 (en)

Families Citing this family (104)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5553062A (en) * 1993-04-22 1996-09-03 Interdigital Communication Corporation Spread spectrum CDMA interference canceler system and method
JP3181440B2 (en) * 1993-07-30 2001-07-03 松下通信工業株式会社 CDMA communication device
FR2709623B1 (en) * 1993-08-31 1995-11-17 Sgs Thomson Microelectronics Digital phase locked loop filter.
FI106898B (en) * 1993-11-10 2001-04-30 Nokia Networks Oy Reception procedure and CDMA receiver
JP2734953B2 (en) * 1993-12-16 1998-04-02 日本電気株式会社 CDMA receiver
KR100217715B1 (en) * 1993-12-31 1999-09-01 윤종용 Up-link system in ds/cdma
US5521946A (en) * 1994-01-07 1996-05-28 The 3Do Company Multi-phase filter/DAC
CA2160382A1 (en) * 1994-02-14 1995-08-17 Michael S. Feeney Decorrelating receiver for asynchronous cdma channels
FI107854B (en) * 1994-03-21 2001-10-15 Nokia Networks Oy A method for eliminating interference in a CDMA cellular network
US5469476A (en) * 1994-03-21 1995-11-21 Motorola, Inc. Circuit and method for filtering voltage spikes
US5481533A (en) * 1994-05-12 1996-01-02 Bell Communications Research, Inc. Hybrid intra-cell TDMA/inter-cell CDMA for wireless networks
JP2655092B2 (en) * 1994-08-11 1997-09-17 日本電気株式会社 Code division multiplex receiver
US5499236A (en) * 1994-08-16 1996-03-12 Unisys Corporation Synchronous multipoint-to-point CDMA communication system
US5574747A (en) 1995-01-04 1996-11-12 Interdigital Technology Corporation Spread spectrum adaptive power control system and method
FR2731310B1 (en) * 1995-03-02 1997-04-11 Alcatel Telspace DEVICE AND METHOD FOR MULTIDEBIT RECEPTION WITH SINGLE FILTERING OF INTERPOLATION AND ADAPTATION
JP3000037B2 (en) * 1995-09-08 2000-01-17 エヌ・ティ・ティ移動通信網株式会社 Communication method and apparatus for the communication method
US5881098A (en) * 1996-02-21 1999-03-09 Industrial Technology Research Institute Efficient demodulation scheme for DSSS communication
US5790537A (en) * 1996-05-15 1998-08-04 Mcgill University Interference suppression in DS-CDMA systems
US5764690A (en) * 1996-06-04 1998-06-09 Motorola, Inc. Apparatus for despreading and demodulating a burst CDMA signal
US5884148A (en) * 1996-07-08 1999-03-16 Omnipoint Corporation Wireless local loop system and method
US5887032A (en) * 1996-09-03 1999-03-23 Amati Communications Corp. Method and apparatus for crosstalk cancellation
AUPO563097A0 (en) * 1997-03-13 1997-04-10 Southern Poro Communications Pty Ltd An improved CDMA receiver
US6078573A (en) * 1997-04-11 2000-06-20 Research Foundation Of State University Of New York Circuitry and method for demodulating code division multiple access (CDMA) signals
US6101178A (en) * 1997-07-10 2000-08-08 Ksi Inc. Pseudolite-augmented GPS for locating wireless telephones
US6208627B1 (en) 1997-12-10 2001-03-27 Xircom, Inc. Signaling and protocol for communication system with wireless trunk
US6580906B2 (en) * 1997-12-10 2003-06-17 Intel Corporation Authentication and security in wireless communication system
US8165028B1 (en) 1997-12-10 2012-04-24 Intel Corporation Monitoring in communication system with wireless trunk
US6526026B1 (en) 1997-12-10 2003-02-25 Intel Corporation Digit transmission over wireless communication link
US6097817A (en) * 1997-12-10 2000-08-01 Omnipoint Corporation Encryption and decryption in communication system with wireless trunk
US6330271B1 (en) 1998-10-13 2001-12-11 Telefonaktiebolaget Lm Ericsson (Publ) CDMA receiver that shares a tracking device among multiple rake branches
US6687461B1 (en) 1998-11-04 2004-02-03 Board Of Regents, The University Of Texas System Active optical lattice filters
KR100283379B1 (en) 1998-11-16 2001-03-02 정선종 Parallel Multistage Interference Cancellation
KR100277697B1 (en) 1998-12-02 2001-01-15 정선종 Adaptive Receiver Using Constrained Mean Square Error Minimization
US6700923B1 (en) 1999-01-04 2004-03-02 Board Of Regents The University Of Texas System Adaptive multiple access interference suppression
US6377611B1 (en) * 1999-02-01 2002-04-23 Industrial Technology Research Institute Apparatus and method for a DSSS/CDMA receiver
US6807405B1 (en) 1999-04-28 2004-10-19 Isco International, Inc. Method and a device for maintaining the performance quality of a code-division multiple access system in the presence of narrow band interference
US7952511B1 (en) 1999-04-07 2011-05-31 Geer James L Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns
US6782036B1 (en) 1999-05-26 2004-08-24 Board Of Regents, The University Of Texas System Smart antenna multiuser detector
US7167683B2 (en) * 1999-08-09 2007-01-23 Broadcom Corporation Bad frame indicator for radio telephone receivers
US6704322B1 (en) * 1999-11-17 2004-03-09 National Science Council Smart different prime code multiplexing system
US7130292B2 (en) * 2000-06-02 2006-10-31 Essex Corporation Optical processor enhanced receiver architecture (opera)
US6792034B1 (en) * 2000-10-06 2004-09-14 Mitsubishi Electric Research Laboratories, Inc. Adaptive multi-users interference reduction and cancellation in a CDMA network
US6560440B1 (en) 2000-10-10 2003-05-06 General Dynamics Decision Systems, Inc. Method for precompensating frequency data for use in high-velocity satellite communication systems
US7636403B2 (en) * 2001-02-20 2009-12-22 Massachusetts Institute Of Technology Correlation shaping multi-signature receiver
US7751469B2 (en) 2001-02-20 2010-07-06 Massachusetts Institute Of Technology Correlation shaping matched filter receiver
US6959206B2 (en) * 2001-03-16 2005-10-25 Isco International, Inc. Dual-duplexed, tower-top front-end for a radio transceiver system
US7039094B2 (en) * 2001-05-03 2006-05-02 Electronics And Telecommunications Research Institute Adaptive rake receiving apparatus constrained with at least one constraint for use in mobile communication system and method therefor
FR2828032B1 (en) * 2001-07-30 2003-09-12 France Telecom JOINT DETECTION OF CDMA CODES FOR MULTI-PATH DOWNLINK
US7230975B2 (en) * 2001-08-07 2007-06-12 Qualcomm Incorporated Adaptive pilot filter for a wireless communication system
GB2396985B (en) 2001-09-12 2005-05-11 Data Fusion Corp Gps near-far resistant receiver
US7158559B2 (en) * 2002-01-15 2007-01-02 Tensor Comm, Inc. Serial cancellation receiver design for a coded signal processing engine
US8085889B1 (en) 2005-04-11 2011-12-27 Rambus Inc. Methods for managing alignment and latency in interference cancellation
US20050101277A1 (en) * 2001-11-19 2005-05-12 Narayan Anand P. Gain control for interference cancellation
US7260506B2 (en) * 2001-11-19 2007-08-21 Tensorcomm, Inc. Orthogonalization and directional filtering
US6792037B2 (en) * 2002-02-28 2004-09-14 Interdigital Technology Corporation Apparatus and method of searching for known sequences
US6718166B2 (en) 2002-05-17 2004-04-06 Illinois Superconductor Corporation, Inc. Multiple carrier adaptive notch filter
US20040208238A1 (en) * 2002-06-25 2004-10-21 Thomas John K. Systems and methods for location estimation in spread spectrum communication systems
US7808937B2 (en) 2005-04-07 2010-10-05 Rambus, Inc. Variable interference cancellation technology for CDMA systems
US7876810B2 (en) 2005-04-07 2011-01-25 Rambus Inc. Soft weighted interference cancellation for CDMA systems
US7787572B2 (en) 2005-04-07 2010-08-31 Rambus Inc. Advanced signal processors for interference cancellation in baseband receivers
US7463609B2 (en) * 2005-07-29 2008-12-09 Tensorcomm, Inc Interference cancellation within wireless transceivers
US7577186B2 (en) * 2002-09-20 2009-08-18 Tensorcomm, Inc Interference matrix construction
US20050180364A1 (en) * 2002-09-20 2005-08-18 Vijay Nagarajan Construction of projection operators for interference cancellation
US8761321B2 (en) 2005-04-07 2014-06-24 Iii Holdings 1, Llc Optimal feedback weighting for soft-decision cancellers
US8005128B1 (en) 2003-09-23 2011-08-23 Rambus Inc. Methods for estimation and interference cancellation for signal processing
US20050123080A1 (en) * 2002-11-15 2005-06-09 Narayan Anand P. Systems and methods for serial cancellation
CN100423466C (en) 2002-09-23 2008-10-01 张量通讯公司 Method and apparatus for selectively applying interference cancellation in spread spectrum systems
US8179946B2 (en) 2003-09-23 2012-05-15 Rambus Inc. Systems and methods for control of advanced receivers
US7653028B2 (en) * 2002-10-03 2010-01-26 Qualcomm Incorporated Scheduling techniques for a packet-access network
JP4210649B2 (en) * 2002-10-15 2009-01-21 テンソルコム インコーポレイテッド Method and apparatus for channel amplitude estimation and interference vector construction
WO2004036811A2 (en) * 2002-10-15 2004-04-29 Tensorcomm Inc. Method and apparatus for interference suppression with efficient matrix inversion in a ds-cdma system
WO2004042948A1 (en) * 2002-10-31 2004-05-21 Tensorcomm, Incorporated Systems and methods for reducing interference in cdma systems
WO2004073159A2 (en) * 2002-11-15 2004-08-26 Tensorcomm, Incorporated Systems and methods for parallel signal cancellation
EP1568160A4 (en) * 2002-11-26 2006-05-24 Interdigital Tech Corp Adaptive turbo multiuser detection for hsdpa/tdd cdma with unknown interferers
US7099378B2 (en) * 2003-01-30 2006-08-29 The Mitre Corporation Sub-symbol parallel interference cancellation
US6873596B2 (en) 2003-05-13 2005-03-29 Nokia Corporation Fourier-transform based linear equalization for CDMA downlink
US7420916B2 (en) * 2003-05-13 2008-09-02 Nokia Corporation Fourier-transform based linear equalization for MIMO CDMA downlink
GB2404822B (en) * 2003-08-07 2007-07-11 Ipwireless Inc Method and arrangement for noise variance and sir estimation
US7042657B2 (en) * 2003-08-28 2006-05-09 Board Of Regents The University Of Texas System Filter for selectively processing optical and other signals
US20050169354A1 (en) * 2004-01-23 2005-08-04 Olson Eric S. Systems and methods for searching interference canceled data
US7477710B2 (en) * 2004-01-23 2009-01-13 Tensorcomm, Inc Systems and methods for analog to digital conversion with a signal cancellation system of a receiver
US20060125689A1 (en) * 2004-12-10 2006-06-15 Narayan Anand P Interference cancellation in a receive diversity system
US8014468B2 (en) 2004-12-15 2011-09-06 Microsoft Corporation Energy detection receiver for UWB
WO2006093723A2 (en) * 2005-02-25 2006-09-08 Data Fusion Corporation Mitigating interference in a signal
US7826516B2 (en) 2005-11-15 2010-11-02 Rambus Inc. Iterative interference canceller for wireless multiple-access systems with multiple receive antennas
KR100868679B1 (en) * 2005-06-01 2008-11-13 삼성전자주식회사 Apparatus and method for transmitting and receiving preamble signal in wireless communication system
US20060291595A1 (en) * 2005-06-28 2006-12-28 Bachu Raja S Communications channel symbol recovery by combining outputs at different decision delays
US7525942B2 (en) 2005-09-01 2009-04-28 Isco International, Inc. Method and apparatus for detecting interference using correlation
US8660210B2 (en) * 2006-01-23 2014-02-25 Qualcomm Incorporated Method of packet format dependent selection of MIMO-OFDM demodulator
US20100109783A1 (en) * 2008-11-03 2010-05-06 T-Var Semiconductor, Llc Reconfigurable Amplifier and Filter Using Time-Varying Circuits
US9048919B2 (en) 2008-11-11 2015-06-02 Isco International Llc Method and apparatus for an adaptive filter architecture
US8385483B2 (en) 2008-11-11 2013-02-26 Isco International, Llc Self-adaptive digital RF bandpass and bandstop filter architecture
US20110081243A1 (en) * 2009-10-02 2011-04-07 Sullivan John T Helical airfoil wind turbines
CN102868422A (en) * 2012-09-07 2013-01-09 天津理工大学 MMSE-BDFE (Minimum Mean Square Error-Blind Decision Feedback Equalizer) multi-user detection system based on neural network, and working method of MMSE-BDFE multi-user detection system
US10812955B2 (en) 2013-01-05 2020-10-20 Brian G Agee Generation of signals with unpredictable transmission properties for wireless M2M networks
US9648444B2 (en) 2014-01-06 2017-05-09 Brian G. Agee Physically secure digital signal processing for wireless M2M networks
US9319916B2 (en) 2013-03-15 2016-04-19 Isco International, Llc Method and appartus for signal interference processing
US9794888B2 (en) 2014-05-05 2017-10-17 Isco International, Llc Method and apparatus for increasing performance of a communication link of a communication node
EP3651386B1 (en) 2015-05-04 2023-08-23 ISCO International, LLC Method and apparatus for increasing the performance of communication paths for communication nodes
US10373608B2 (en) 2015-10-22 2019-08-06 Texas Instruments Incorporated Time-based frequency tuning of analog-to-information feature extraction
US10652835B2 (en) 2016-06-01 2020-05-12 Isco International, Llc Signal conditioning to mitigate interference impacting wireless communication links in radio access networks
US10298279B2 (en) 2017-04-05 2019-05-21 Isco International, Llc Method and apparatus for increasing performance of communication paths for communication nodes
US10812121B2 (en) 2017-08-09 2020-10-20 Isco International, Llc Method and apparatus for detecting and analyzing passive intermodulation interference in a communication system
US10284313B2 (en) 2017-08-09 2019-05-07 Isco International, Llc Method and apparatus for monitoring, detecting, testing, diagnosing and/or mitigating interference in a communication system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217586A (en) * 1977-05-16 1980-08-12 General Electric Company Channel estimating reference signal processor for communication system adaptive antennas
US4730340A (en) * 1980-10-31 1988-03-08 Harris Corp. Programmable time invariant coherent spread symbol correlator
US4472814A (en) * 1982-09-01 1984-09-18 The United States Of America As Represented By The Secretary Of The Army CW Interference cancelling system for spread spectrum signals
US4472815A (en) * 1982-09-27 1984-09-18 The United States Of America As Represented By The Secretary Of The Army Pulse interference cancelling system for spread spectrum signals
US4470138A (en) * 1982-11-04 1984-09-04 The United States Of America As Represented By The Secretary Of The Army Non-orthogonal mobile subscriber multiple access system
NL8303253A (en) * 1983-09-22 1985-04-16 Hollandse Signaalapparaten Bv COMMUNICATION RECEIVING DEVICE DESIGNED FOR THE SUPPRESSION OF NOISE AND FAULT SIGNALS.
US4707839A (en) * 1983-09-26 1987-11-17 Harris Corporation Spread spectrum correlator for recovering CCSK data from a PN spread MSK waveform
US4638493A (en) * 1985-06-17 1987-01-20 Sperry Corporation Adaptive interference rejection for improved frequency hop detection
US4779266A (en) * 1986-03-10 1988-10-18 Bell Communications Research, Inc. Encoding and decoding for code division multiple access communication systems
US5099493A (en) * 1990-08-27 1992-03-24 Zeger-Abrams Incorporated Multiple signal receiver for direct sequence, code division multiple access, spread spectrum signals
US5260968A (en) * 1992-06-23 1993-11-09 The Regents Of The University Of California Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering
US5268927A (en) * 1992-10-06 1993-12-07 Mayflower Communications Company, Inc. Digital adaptive transversal filter for spread spectrum receivers

Also Published As

Publication number Publication date
US5343496A (en) 1994-08-30
EP0720799A1 (en) 1996-07-10
WO1995008890A1 (en) 1995-03-30
JPH08510606A (en) 1996-11-05
EP0720799A4 (en) 2000-04-05
CA2169961C (en) 1999-02-23

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Effective date: 20030915