CA2262358A1 - Fdd forward link beamforming method for a fdd communications system - Google Patents

Fdd forward link beamforming method for a fdd communications system Download PDF

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Publication number
CA2262358A1
CA2262358A1 CA002262358A CA2262358A CA2262358A1 CA 2262358 A1 CA2262358 A1 CA 2262358A1 CA 002262358 A CA002262358 A CA 002262358A CA 2262358 A CA2262358 A CA 2262358A CA 2262358 A1 CA2262358 A1 CA 2262358A1
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CA
Canada
Prior art keywords
bursts
remote station
base station
calibration
beam steering
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
CA002262358A
Other languages
French (fr)
Other versions
CA2262358C (en
Inventor
David James Ryan
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.)
AT&T Wireless Services Inc
Original Assignee
AT&T Wireless Services 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 AT&T Wireless Services Inc filed Critical AT&T Wireless Services Inc
Publication of CA2262358A1 publication Critical patent/CA2262358A1/en
Application granted granted Critical
Publication of CA2262358C publication Critical patent/CA2262358C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H04B7/12—Frequency diversity
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A highly bandwidth-efficient communications method is disclosed, to maximize the signal-to-interference-noise ratio (SINR) of transmissions from a base station to a remote station in a wireless communications system. The method is used for base stations that have a plurality of antenna elements that are capable of spatial beam steering by altering the relative phase of transmission of signals from the respective elements. The method of the invention is based on providing calibration frames that sequentially transmit calibration bursts from the respective antenna elements for a particular destination remote station. The calibration bursts include a plurality of tone frequencies arranged in a distinctive orthogonal frequency division multiplexed pattern unique to the base station. The unique pattern enables a remote station to distinguish the base station's bursts from other signals present in a crowded area. The distinctive orthogonal frequency division multiplexed pattern can be a Hadamard code pattern, for example. The plurality of calibration bursts are part of a transmission frame having a reference phase. The remote station receives the calibration bursts and measures values related to the relative phase difference between the calibration bursts and the reference phase. The remote station also measures the SINR of the received bursts. The measured values are then prepared as a sampling data message that is transmitted by the remote station back to the base station. The base station then calculates therefrom a beam steering correction to modify the relative phase difference. This beam steering correction is then applied to traffic bursts that are respectively transmitted from the plurality of antenna elements at the base station, to steer the plurality of traffic bursts toward the remote station. The beam steering correction steers the traffic bursts to maximize the signal-to-interference-noise ratio (SINK) of the traffic bursts at the remote station.
CA002262358A 1998-03-05 1999-02-23 Fdd forward link beamforming method for a fdd communications system Expired - Lifetime CA2262358C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/035,286 US6134261A (en) 1998-03-05 1998-03-05 FDD forward link beamforming method for a FDD communications system
US09/035,286 1998-03-05

Publications (2)

Publication Number Publication Date
CA2262358A1 true CA2262358A1 (en) 1999-09-05
CA2262358C CA2262358C (en) 2002-12-31

Family

ID=21881727

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002262358A Expired - Lifetime CA2262358C (en) 1998-03-05 1999-02-23 Fdd forward link beamforming method for a fdd communications system

Country Status (5)

Country Link
US (1) US6134261A (en)
EP (1) EP0940934B1 (en)
BR (1) BR9917436A (en)
CA (1) CA2262358C (en)
DE (1) DE69919052T2 (en)

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US6615024B1 (en) * 1998-05-01 2003-09-02 Arraycomm, Inc. Method and apparatus for determining signatures for calibrating a communication station having an antenna array
US6320898B1 (en) * 1998-11-30 2001-11-20 Nortel Networks Limited CDMA pseudo-smart antenna selection
US6782277B1 (en) * 1999-09-30 2004-08-24 Qualcomm Incorporated Wireless communication system with base station beam sweeping
JP4187377B2 (en) * 2000-02-23 2008-11-26 富士通株式会社 Radio transceiver and radio wave radiation direction control method
US7088765B1 (en) * 2000-03-15 2006-08-08 Ndsu Research Foundation Vector calibration system
DE60021524T2 (en) * 2000-04-18 2006-06-01 Sony International (Europe) Gmbh OFDM diversity transmission
US8363744B2 (en) 2001-06-10 2013-01-29 Aloft Media, Llc Method and system for robust, secure, and high-efficiency voice and packet transmission over ad-hoc, mesh, and MIMO communication networks
EP2256981B1 (en) * 2000-08-24 2014-06-04 Sony Deutschland Gmbh Communication device for receiving OFDM signals in a wireless communication system
EP2031788B1 (en) 2000-08-24 2011-11-30 Sony Deutschland Gmbh Communication device for receiving and transmitting OFDM signals in a wireless communication system
US6404803B1 (en) * 2000-10-24 2002-06-11 Neoreach, Inc. PN code acquisition with adaptive antenna array and adaptive threshold for CDMA wireless communications
US6999430B2 (en) * 2000-11-30 2006-02-14 Qualcomm Incorporated Method and apparatus for transmitting data traffic on a wireless communication channel
JP2002198875A (en) * 2000-12-22 2002-07-12 Nippon Soken Inc Communication terminal of cdma system
US6882619B1 (en) 2001-02-21 2005-04-19 At&T Corp. Interference suppressing OFDM method for wireless communications
US7158474B1 (en) * 2001-02-21 2007-01-02 At&T Corp. Interference suppressing OFDM system for wireless communications
KR100428709B1 (en) * 2001-08-17 2004-04-27 한국전자통신연구원 Apparatus for Forward Beamforming using Feedback of Multipath Information and Method Thereof
US6570527B1 (en) * 2001-09-28 2003-05-27 Arraycomm, Inc. Calibration of differential frequency-dependent characteristics of a radio communications system
JP3997890B2 (en) 2001-11-13 2007-10-24 松下電器産業株式会社 Transmission method and transmission apparatus
AU2003216514A1 (en) * 2002-03-06 2003-09-22 Xtremespectrum, Inc. Method of accommodating overlapping or adjacent networks
US7333814B2 (en) * 2002-03-06 2008-02-19 Freescale Semiconductor, Inc. Method of accommodating overlapping or adjacent networks
US7289826B1 (en) 2002-04-16 2007-10-30 Faulkner Interstices, Llc Method and apparatus for beam selection in a smart antenna system
US7065383B1 (en) 2002-04-16 2006-06-20 Omri Hovers Method and apparatus for synchronizing a smart antenna apparatus with a base station transceiver
US7346365B1 (en) 2002-04-16 2008-03-18 Faulkner Interstices Llc Smart antenna system and method
US7529525B1 (en) * 2002-04-16 2009-05-05 Faulkner Interstices Llc Method and apparatus for collecting information for use in a smart antenna system
US20040004951A1 (en) * 2002-07-05 2004-01-08 Interdigital Technology Corporation Method for performing wireless switching
US7339979B1 (en) 2003-02-11 2008-03-04 Calamp Corp. Adaptive beamforming methods and systems that enhance performance and reduce computations
US7392015B1 (en) * 2003-02-14 2008-06-24 Calamp Corp. Calibration methods and structures in wireless communications systems
US7245938B2 (en) * 2003-10-17 2007-07-17 Sobczak David M Wireless antenna traffic matrix
US7263335B2 (en) 2004-07-19 2007-08-28 Purewave Networks, Inc. Multi-connection, non-simultaneous frequency diversity in radio communication systems
US7460839B2 (en) 2004-07-19 2008-12-02 Purewave Networks, Inc. Non-simultaneous frequency diversity in radio communication systems
US8583995B2 (en) * 2005-11-16 2013-11-12 Qualcomm Incorporated Multi-mode processor
US8429502B2 (en) * 2005-11-16 2013-04-23 Qualcomm Incorporated Frame format for millimeter-wave systems
US8910027B2 (en) * 2005-11-16 2014-12-09 Qualcomm Incorporated Golay-code generation
US20080131133A1 (en) * 2006-05-17 2008-06-05 Blunt Shannon D Low sinr backscatter communications system and method
US8856628B2 (en) * 2007-10-10 2014-10-07 Qualcomm Incorporated Method and apparatus for generation and usage of extended golay codes
US8472497B2 (en) * 2007-10-10 2013-06-25 Qualcomm Incorporated Millimeter wave beaconing with directional antennas
US7944891B2 (en) * 2008-07-08 2011-05-17 Motorola Mobility, Inc. Frequency transformation based transmit beamforming in a communication system
EP2710843B1 (en) 2011-05-17 2015-03-18 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for supporting calibration of correlated antennas
US8971438B2 (en) 2012-07-09 2015-03-03 Qualcomm Incorporated Methods and apparatus for simplified beamforming
US10727911B2 (en) * 2018-08-20 2020-07-28 Nokia Solutions And Networks Oy Beamforming in MIMO radio networks

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US5151919A (en) * 1990-12-17 1992-09-29 Ericsson-Ge Mobile Communications Holding Inc. Cdma subtractive demodulation
US5617102A (en) * 1994-11-18 1997-04-01 At&T Global Information Solutions Company Communications transceiver using an adaptive directional antenna
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US5987338A (en) * 1997-02-19 1999-11-16 At&T Wireless Services Remote wireless unit having reduced power operating mode
US6085114A (en) * 1997-02-06 2000-07-04 At&T Wireless Systems Inc. Remote wireless unit having reduced power operating mode
US5933421A (en) * 1997-02-06 1999-08-03 At&T Wireless Services Inc. Method for frequency division duplex communications
US5914981A (en) * 1997-02-24 1999-06-22 At&T Wireless Services Inc. Method to indicate synchronization lock of a remote station with a base station for a discrete multitone spread spectrum communications system
US5923700A (en) * 1997-02-24 1999-07-13 At & T Wireless Adaptive weight update method and system for a discrete multitone spread spectrum communications system
US6002664A (en) * 1997-02-24 1999-12-14 At&T Wireless Services Inc. Method to gain access to a base station in a discrete multitone spread spectrum communications system

Also Published As

Publication number Publication date
BR9917436A (en) 2002-04-23
DE69919052T2 (en) 2005-08-04
EP0940934B1 (en) 2004-08-04
DE69919052D1 (en) 2004-09-09
US6134261A (en) 2000-10-17
EP0940934A2 (en) 1999-09-08
CA2262358C (en) 2002-12-31
EP0940934A3 (en) 2001-04-11

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Effective date: 20190225