WO2005060574A3 - Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques - Google Patents

Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques Download PDF

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Publication number
WO2005060574A3
WO2005060574A3 PCT/US2004/040716 US2004040716W WO2005060574A3 WO 2005060574 A3 WO2005060574 A3 WO 2005060574A3 US 2004040716 W US2004040716 W US 2004040716W WO 2005060574 A3 WO2005060574 A3 WO 2005060574A3
Authority
WO
WIPO (PCT)
Prior art keywords
beam forming
combining
signal
output signal
wireless communication
Prior art date
Application number
PCT/US2004/040716
Other languages
French (fr)
Other versions
WO2005060574A2 (en
Inventor
James June-Ming Wang
Jack Winters
Meng Chang Doong
Chau Chin Yang
Original Assignee
Motia Inc
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 Motia Inc filed Critical Motia Inc
Publication of WO2005060574A2 publication Critical patent/WO2005060574A2/en
Publication of WO2005060574A3 publication Critical patent/WO2005060574A3/en

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Classifications

    • 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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
    • 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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
    • 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
    • H04B7/10—Polarisation diversity; Directional diversity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The present invention provides a method and system for operating a wireless communication system (Fig.2) in which received signals from a plurality of antennas (21) are weighted and combined with a beam forming operation (30) to form an output signal. The beam forming operation determines weights adjusted to increase a desired signal power in the output signal while reducing the power in the output signal of out-of-band components. In an embodiment of the present invention, beam forming operations are performed with maximal ratio combining (MRC). Alternatively, a constant modulus algorithm (CMA) can be used for beam forming operations. In an alternate embodiment , improved interference suppression is performed with a novel algorithm referred to as an interference nulling algorithm (INA). The INA receives an error signal which is 180 degrees out of phase with a combination of the Channels for individual antennas, referred to as the SUM channel. The error signal is determined by complex conjugate multiplication of the individual signals and a reference complex signal. It is desirable to simultaneously achieve diversity and combining gain and suppress the adjacent channel by combining the weight generation for MRC and that for WA, as described above, to generate antenna weights similar to those of MMSE combining.
PCT/US2004/040716 2003-12-10 2004-12-06 Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques WO2005060574A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/732,003 2003-12-10
US10/732,003 US7260370B2 (en) 2003-12-10 2003-12-10 Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques

Publications (2)

Publication Number Publication Date
WO2005060574A2 WO2005060574A2 (en) 2005-07-07
WO2005060574A3 true WO2005060574A3 (en) 2006-08-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/040716 WO2005060574A2 (en) 2003-12-10 2004-12-06 Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques

Country Status (2)

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US (2) US7260370B2 (en)
WO (1) WO2005060574A2 (en)

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US20060073801A1 (en) 2006-04-06
US7260370B2 (en) 2007-08-21
US7702304B2 (en) 2010-04-20
WO2005060574A2 (en) 2005-07-07
US20060135097A1 (en) 2006-06-22

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