WO2004073159A3 - Systems and methods for parallel signal cancellation - Google Patents

Systems and methods for parallel signal cancellation Download PDF

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Publication number
WO2004073159A3
WO2004073159A3 PCT/US2004/003675 US2004003675W WO2004073159A3 WO 2004073159 A3 WO2004073159 A3 WO 2004073159A3 US 2004003675 W US2004003675 W US 2004003675W WO 2004073159 A3 WO2004073159 A3 WO 2004073159A3
Authority
WO
WIPO (PCT)
Prior art keywords
signals
interference
methods
processing engine
cancellation
Prior art date
Application number
PCT/US2004/003675
Other languages
French (fr)
Other versions
WO2004073159A2 (en
Inventor
P Narayan Anand
Eric S Olson
Original Assignee
Tensorcomm 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
Priority claimed from US10/294,834 external-priority patent/US7200183B2/en
Priority claimed from US10/669,954 external-priority patent/US7787518B2/en
Priority claimed from US10/686,829 external-priority patent/US7580448B2/en
Priority claimed from US10/686,359 external-priority patent/US7068706B2/en
Priority claimed from US10/686,828 external-priority patent/US7430253B2/en
Priority claimed from US10/699,360 external-priority patent/US20040146093A1/en
Priority claimed from US10/763,346 external-priority patent/US7039136B2/en
Application filed by Tensorcomm Inc filed Critical Tensorcomm Inc
Publication of WO2004073159A2 publication Critical patent/WO2004073159A2/en
Publication of WO2004073159A3 publication Critical patent/WO2004073159A3/en

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
    • H04B1/7107—Subtractive interference cancellation
    • H04B1/71075—Parallel interference cancellation
    • 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
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker

Abstract

The present invention provides systems and methods for parallel interference suppression. A processing engine is used to substantially cancel a plurality of interfering signals within a received signal. The processing engine includes a plurality of matrix generators (102s) that are used to generate matrices, each matrix comprising elements of a unique interference signal selected for cancellation. The processing engine also includes one or more processors (105s) that use the matrices to generate cancellation operators. A plurality of applicators applies the cancellation operators to parallel but not necessarily unique input signals to substantially cancel the interference signals from the input signals. These signals may include received signals, interference cancelled signals and/or PN codes.
PCT/US2004/003675 2002-11-15 2004-02-06 Systems and methods for parallel signal cancellation WO2004073159A2 (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US10/294,834 US7200183B2 (en) 2001-11-16 2002-11-15 Construction of an interference matrix for a coded signal processing engine
US44524303P 2003-02-06 2003-02-06
US60/445,243 2003-02-06
US10/669,954 US7787518B2 (en) 2002-09-23 2003-09-23 Method and apparatus for selectively applying interference cancellation in spread spectrum systems
US10/686,829 US7580448B2 (en) 2002-10-15 2003-10-15 Method and apparatus for channel amplitude estimation and interference vector construction
US10/686,359 US7068706B2 (en) 2002-10-15 2003-10-15 System and method for adjusting phase
US10/686,828 US7430253B2 (en) 2002-10-15 2003-10-15 Method and apparatus for interference suppression with efficient matrix inversion in a DS-CDMA system
US10/699,360 US20040146093A1 (en) 2002-10-31 2003-10-31 Systems and methods for reducing interference in CDMA systems
US10/763,346 US7039136B2 (en) 2001-11-19 2004-01-23 Interference cancellation in a signal

Publications (2)

Publication Number Publication Date
WO2004073159A2 WO2004073159A2 (en) 2004-08-26
WO2004073159A3 true WO2004073159A3 (en) 2004-09-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/003675 WO2004073159A2 (en) 2002-11-15 2004-02-06 Systems and methods for parallel signal cancellation

Country Status (2)

Country Link
US (2) US7394879B2 (en)
WO (1) WO2004073159A2 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2783987B1 (en) * 1998-09-11 2006-08-04 Commissariat Energie Atomique METHOD FOR RECEIVING CDMA SIGNALS WITH PARALLEL REMOVAL OF INTERFERENCE, STAGE AND RECEPTOR CORRESPONDING
US8611311B2 (en) * 2001-06-06 2013-12-17 Qualcomm Incorporated Method and apparatus for canceling pilot interference in a wireless communication system
US7190749B2 (en) * 2001-06-06 2007-03-13 Qualcomm Incorporated Method and apparatus for canceling pilot interference in a wireless communication system
US7394879B2 (en) * 2001-11-19 2008-07-01 Tensorcomm, Inc. Systems and methods for parallel signal cancellation
US7808937B2 (en) 2005-04-07 2010-10-05 Rambus, Inc. Variable interference cancellation technology for CDMA systems
US8761321B2 (en) 2005-04-07 2014-06-24 Iii Holdings 1, Llc Optimal feedback weighting for soft-decision cancellers
US8179946B2 (en) 2003-09-23 2012-05-15 Rambus Inc. Systems and methods for control of advanced receivers
US7873070B2 (en) * 2004-09-16 2011-01-18 Alcatel-Lucent Usa Inc. Determining a number of automatic request retransmissions based on block size
US8422955B2 (en) * 2004-12-23 2013-04-16 Qualcomm Incorporated Channel estimation for interference cancellation
US8099123B2 (en) 2004-12-23 2012-01-17 Qualcomm Incorporated Adaptation of transmit subchannel gains in a system with interference cancellation
US8442441B2 (en) 2004-12-23 2013-05-14 Qualcomm Incorporated Traffic interference cancellation
US8406695B2 (en) * 2004-12-23 2013-03-26 Qualcomm Incorporated Joint interference cancellation of pilot, overhead and traffic channels
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
US8472877B2 (en) * 2005-10-24 2013-06-25 Qualcomm Incorporated Iterative interference cancellation system and method
US8385388B2 (en) * 2005-12-06 2013-02-26 Qualcomm Incorporated Method and system for signal reconstruction from spatially and temporally correlated received samples
WO2009002936A1 (en) * 2007-06-22 2008-12-31 Signav Pty Ltd. Delayed parallel interference cancellation for gps c/a code receivers
US7894774B2 (en) * 2007-08-02 2011-02-22 Wireless Technology Solutions Llc Communication unit and method for interference mitigation
CN101534507B (en) * 2008-03-12 2014-04-16 株式会社Ntt都科摩 Physical resource distributing method and device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601046A (en) * 1984-05-15 1986-07-15 Halpern Peter H System for transmitting data through a troposcatter medium
US6032056A (en) * 1996-05-20 2000-02-29 Metawave Communications Corporation Cellular system signal conditioner

Family Cites Families (119)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742201A (en) 1971-02-22 1973-06-26 Raytheon Co Transformer system for orthogonal digital waveforms
US4359738A (en) 1974-11-25 1982-11-16 The United States Of America As Represented By The Secretary Of The Navy Clutter and multipath suppressing sidelobe canceller antenna system
US4088955A (en) 1975-04-07 1978-05-09 Baghdady Elie J Interference rejection technique
US4713794A (en) 1978-12-22 1987-12-15 Raytheon Company Digital memory system
US4309769A (en) 1980-02-25 1982-01-05 Harris Corporation Method and apparatus for processing spread spectrum signals
US4665401A (en) 1980-10-10 1987-05-12 Sperry Corporation Millimeter wave length guidance system
IL67379A (en) 1982-12-01 1985-11-29 Tadiran Israel Elect Ind Ltd Real-time frequency management system for hf communication networks
US4670885A (en) 1985-02-26 1987-06-02 Signatron, Inc. Spread spectrum adaptive antenna interference canceller
US4893316A (en) 1985-04-04 1990-01-09 Motorola, Inc. Digital radio frequency receiver
US4965732A (en) 1985-11-06 1990-10-23 The Board Of Trustees Of The Leland Stanford Junior University Methods and arrangements for signal reception and parameter estimation
EP0232626B1 (en) 1985-12-26 1993-02-10 Matsushita Electric Industrial Co., Ltd. Method of digital signal transmission having a low error rate in the presence of multipath transmission
US4922506A (en) 1988-01-11 1990-05-01 Sicom Corporation Compensating for distortion in a communication channel
US4933639A (en) 1989-02-13 1990-06-12 The Board Of Regents, The University Of Texas System Axis translator for magnetic resonance imaging
US5017929A (en) 1989-09-06 1991-05-21 Hughes Aircraft Company Angle of arrival measuring technique
US5109390A (en) 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5119401A (en) 1989-11-17 1992-06-02 Nec Corporation Decision feedback equalizer including forward part whose signal reference point is shiftable depending on channel response
EP0436048B1 (en) 1990-01-02 1995-11-02 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Oblique spaced antenna method and system for measuring atmospheric wind fields
US5220687A (en) 1990-05-30 1993-06-15 Pioneer Electronic Corporation Radio receiver having switch for switching between a wide filter and a narrow filter
US5099493A (en) 1990-08-27 1992-03-24 Zeger-Abrams Incorporated Multiple signal receiver for direct sequence, code division multiple access, spread spectrum signals
US5390207A (en) 1990-11-28 1995-02-14 Novatel Communications Ltd. Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
US5513176A (en) 1990-12-07 1996-04-30 Qualcomm Incorporated Dual distributed antenna system
IL100213A (en) 1990-12-07 1995-03-30 Qualcomm Inc CDMA microcellular telephone system and distributed antenna system therefor
US5151919A (en) 1990-12-17 1992-09-29 Ericsson-Ge Mobile Communications Holding Inc. Cdma subtractive demodulation
US5218619A (en) 1990-12-17 1993-06-08 Ericsson Ge Mobile Communications Holding, Inc. CDMA subtractive demodulation
US5105435A (en) 1990-12-21 1992-04-14 Motorola, Inc. Method and apparatus for cancelling spread-spectrum noise
JP2684888B2 (en) 1991-08-06 1997-12-03 国際電信電話株式会社 Adaptive array antenna control method
US5263191A (en) 1991-12-11 1993-11-16 Westinghouse Electric Corp. Method and circuit for processing and filtering signals
JPH05268128A (en) 1992-03-18 1993-10-15 Kokusai Denshin Denwa Co Ltd <Kdd> Cdma communication system
US5237586A (en) 1992-03-25 1993-08-17 Ericsson-Ge Mobile Communications Holding, Inc. Rake receiver with selective ray combining
TW214620B (en) 1992-04-13 1993-10-11 Ericsson Ge Mobile Communicat Calling channel in CDMA communications system
US5224122A (en) 1992-06-29 1993-06-29 Motorola, Inc. Method and apparatus for canceling spread-spectrum noise
EP0595247B1 (en) 1992-10-28 1998-07-15 Atr Optical And Radio Communications Research Laboratories Apparatus for controlling array antenna comprising a plurality of antenna elements and method therefor
ZA938324B (en) 1992-11-24 1994-06-07 Qualcomm Inc Pilot carrier dot product circuit
JPH0744473B2 (en) 1993-02-02 1995-05-15 日本電気株式会社 Demodulation system
US5353302A (en) 1993-02-03 1994-10-04 At&T Bell Laboratories Signal despreader for CDMA systems
US5343493A (en) 1993-03-16 1994-08-30 Hughes Aircraft Company Personal assistance system and method for use with a cellular communication system
US5553062A (en) 1993-04-22 1996-09-03 Interdigital Communication Corporation Spread spectrum CDMA interference canceler system and method
US5305349A (en) 1993-04-29 1994-04-19 Ericsson Ge Mobile Communications Inc. Quantized coherent rake receiver
US5437055A (en) 1993-06-03 1995-07-25 Qualcomm Incorporated Antenna system for multipath diversity in an indoor microcellular communication system
FR2709028B1 (en) 1993-08-13 1995-10-20 Matra Communication Method for selecting the propagation paths used to receive messages transmitted by CDMA radiocommunication.
US5343496A (en) 1993-09-24 1994-08-30 Bell Communications Research, Inc. Interference suppression in CDMA systems
US5481570A (en) 1993-10-20 1996-01-02 At&T Corp. Block radio and adaptive arrays for wireless systems
US5386202A (en) 1993-11-03 1995-01-31 Sicom, Inc. Data communication modulation with managed intersymbol interference
US5553098A (en) 1994-04-12 1996-09-03 Sicom, Inc. Demodulator with selectable coherent and differential data
US5440265A (en) 1994-09-14 1995-08-08 Sicom, Inc. Differential/coherent digital demodulator operating at multiple symbol points
FI102797B (en) 1994-10-07 1999-02-15 Nokia Mobile Phones Ltd A method of signal detection in a receiver of a TDMA mobile communication system, and a receiver implementing the method
FI99184C (en) 1994-11-28 1997-10-10 Nokia Telecommunications Oy Method for allocating available frequency bands to different cells in a TDMA cellular radio system and a TDMA cellular radio system
US5602833A (en) 1994-12-19 1997-02-11 Qualcomm Incorporated Method and apparatus for using Walsh shift keying in a spread spectrum communication system
US5644592A (en) 1995-04-24 1997-07-01 California Institute Of Technology Parallel interference cancellation for CDMA applications
US5508708A (en) 1995-05-08 1996-04-16 Motorola, Inc. Method and apparatus for location finding in a CDMA system
US6018317A (en) 1995-06-02 2000-01-25 Trw Inc. Cochannel signal processing system
US6240124B1 (en) 1995-06-06 2001-05-29 Globalstar L.P. Closed loop power control for low earth orbit satellite communications system
WO1996042146A1 (en) 1995-06-13 1996-12-27 Ntt Mobile Communications Network Inc. Cdma demodulator
US5978413A (en) 1995-08-28 1999-11-02 Bender; Paul E. Method and system for processing a plurality of multiple access transmissions
US5872776A (en) 1995-11-22 1999-02-16 Yang; Lin-Lang Signal detection and interference cancellation based on simplified matrix inversion for CDMA applications
JP3272940B2 (en) 1996-03-07 2002-04-08 ケイディーディーアイ株式会社 Spread spectrum signal demodulator
JP3449457B2 (en) 1996-04-18 2003-09-22 勝元 崔 Signal processing apparatus and method for minimizing interference and reducing noise in a wireless communication system
US6396804B2 (en) * 1996-05-28 2002-05-28 Qualcomm Incorporated High data rate CDMA wireless communication system
JP2743912B2 (en) 1996-05-30 1998-04-28 日本電気株式会社 CDMA interference canceller
JP2746261B2 (en) 1996-06-10 1998-05-06 日本電気株式会社 DS-CDMA interference cancellation device
US5926761A (en) 1996-06-11 1999-07-20 Motorola, Inc. Method and apparatus for mitigating the effects of interference in a wireless communication system
DE19623667C2 (en) 1996-06-13 2003-02-13 Siemens Ag Method and device for the detection of information transmitted according to the DS-CDMA principle in a receiving device
US6430216B1 (en) * 1997-08-22 2002-08-06 Data Fusion Corporation Rake receiver for spread spectrum signal demodulation
US5859613A (en) 1996-08-30 1999-01-12 Harris Corporation System and method for geolocating plural remote transmitters
US6512481B1 (en) * 1996-10-10 2003-01-28 Teratech Corporation Communication system using geographic position data
JP3311943B2 (en) 1996-10-18 2002-08-05 松下電器産業株式会社 Interference signal canceller
US6222828B1 (en) 1996-10-30 2001-04-24 Trw, Inc. Orthogonal code division multiple access waveform format for use in satellite based cellular telecommunications
US6243372B1 (en) * 1996-11-14 2001-06-05 Omnipoint Corporation Methods and apparatus for synchronization in a wireless network
US5844521A (en) 1996-12-02 1998-12-01 Trw Inc. Geolocation method and apparatus for satellite based telecommunications system
US5787130A (en) 1996-12-10 1998-07-28 Motorola Inc. Method and apparatus for canceling interference in a spread-spectrum communication system
JPH10190495A (en) 1996-12-20 1998-07-21 Fujitsu Ltd Interference canceler
JP3390900B2 (en) 1996-12-20 2003-03-31 富士通株式会社 Interference canceller and provisional determination method
US6163696A (en) 1996-12-31 2000-12-19 Lucent Technologies Inc. Mobile location estimation in a wireless communication system
JP3326679B2 (en) 1997-01-31 2002-09-24 沖電気工業株式会社 CDMA receiver
US5943331A (en) 1997-02-28 1999-08-24 Interdigital Technology Corporation Orthogonal code synchronization system and method for spread spectrum CDMA communications
US6233459B1 (en) 1997-04-10 2001-05-15 The Atlantis Company, Limited, Japan System for providing Geolocation of a mobile transceiver
US6201799B1 (en) 1997-05-01 2001-03-13 Lucent Technologies, Inc Partial decorrelation for a coherent multicode code division multiple access receiver
US5894500A (en) 1997-06-13 1999-04-13 Motorola, Inc. Method and apparatus for canceling signals in a spread-spectrum communication system
US5872540A (en) 1997-06-26 1999-02-16 Electro-Radiation Incorporated Digital interference suppression system for radio frequency interference cancellation
US6359874B1 (en) * 1998-05-21 2002-03-19 Ericsson Inc. Partially block-interleaved CDMA coding and decoding
GB2343801B (en) * 1997-08-21 2001-09-12 Data Fusion Corp Method and apparatus for acquiring wide-band pseudorandom noise encoded waveforms
US6101385A (en) 1997-10-09 2000-08-08 Globalstar L.P. Satellite communication service with non-congruent sub-beam coverage
US6157842A (en) 1997-10-16 2000-12-05 Telefonaktiebolaget Lm Ericsson System and method for positioning a mobile station in a CDMA cellular system
US6175587B1 (en) 1997-12-30 2001-01-16 Motorola, Inc. Communication device and method for interference suppression in a DS-CDMA system
US6131013A (en) 1998-01-30 2000-10-10 Motorola, Inc. Method and apparatus for performing targeted interference suppression
US6219376B1 (en) 1998-02-21 2001-04-17 Topcon Positioning Systems, Inc. Apparatuses and methods of suppressing a narrow-band interference with a compensator and adjustment loops
JP2937994B1 (en) * 1998-03-04 1999-08-23 日本電気移動通信株式会社 Cellular system, mobile portable device, base station device, and optimal path detection method and device
JP2965202B1 (en) 1998-04-07 1999-10-18 日本電気株式会社 Multi-user receiving apparatus and CDMA communication system
US6266529B1 (en) 1998-05-13 2001-07-24 Nortel Networks Limited Method for CDMA handoff in the vicinity of highly sectorized cells
JP2970656B1 (en) * 1998-06-25 1999-11-02 日本電気株式会社 DS-CDMA multi-user interference canceller
US6154443A (en) 1998-08-11 2000-11-28 Industrial Technology Research Institute FFT-based CDMA RAKE receiver system and method
US6363104B1 (en) * 1998-10-02 2002-03-26 Ericsson Inc. Method and apparatus for interference cancellation in a rake receiver
US6230180B1 (en) 1998-10-14 2001-05-08 Conexant Systems, Inc. Digital signal processor configuration including multiplying units coupled to plural accumlators for enhanced parallel mac processing
KR100378124B1 (en) 1998-12-10 2003-06-19 삼성전자주식회사 Device and method for estimating the position of terminal in mobile communication system
US6351642B1 (en) * 1998-12-22 2002-02-26 Telefonaktiebolaget Lm Ericsson (Publ) CDMA soft hand-off
US6184829B1 (en) * 1999-01-08 2001-02-06 Trueposition, Inc. Calibration for wireless location system
US6215812B1 (en) 1999-01-28 2001-04-10 Bae Systems Canada Inc. Interference canceller for the protection of direct-sequence spread-spectrum communications from high-power narrowband interference
US6104712A (en) 1999-02-22 2000-08-15 Robert; Bruno G. Wireless communication network including plural migratory access nodes
US6263208B1 (en) 1999-05-28 2001-07-17 Lucent Technologies Inc. Geolocation estimation method for CDMA terminals based on pilot strength measurements
US6385264B1 (en) * 1999-06-08 2002-05-07 Qualcomm Incorporated Method and apparatus for mitigating interference between base stations in a wideband CDMA system
US6115409A (en) 1999-06-21 2000-09-05 Envoy Networks, Inc. Integrated adaptive spatial-temporal system for controlling narrowband and wideband sources of interferences in spread spectrum CDMA receivers
US6157847A (en) 1999-06-29 2000-12-05 Lucent Technologies Inc. Base station system including parallel interference cancellation processor
US6166690A (en) 1999-07-02 2000-12-26 Sensor Systems, Inc. Adaptive nulling methods for GPS reception in multiple-interference environments
US6570909B1 (en) * 1999-07-09 2003-05-27 Nokia Mobile Phones Interference suppression in a CDMA receiver
US6404760B1 (en) * 1999-07-19 2002-06-11 Qualcomm Incorporated CDMA multiple access interference cancellation using signal estimation
US6574270B1 (en) * 1999-07-30 2003-06-03 Ericsson Inc. Baseband interference canceling spread spectrum communications methods and apparatus
US6278726B1 (en) 1999-09-10 2001-08-21 Interdigital Technology Corporation Interference cancellation in a spread spectrum communication system
US6515980B1 (en) * 1999-09-22 2003-02-04 Ericsson Inc. Methods and apparatus for interference cancellation using complex interference orthogonalization techniques
KR100473215B1 (en) * 1999-10-19 2005-03-10 인터디지탈 테크날러지 코포레이션 Receiver for multiuser detection of cdma signals
US6922434B2 (en) * 1999-10-19 2005-07-26 Ericsson Inc. Apparatus and methods for finger delay selection in RAKE receivers
US6377636B1 (en) * 1999-11-02 2002-04-23 Iospan Wirless, Inc. Method and wireless communications system using coordinated transmission and training for interference mitigation
US6282231B1 (en) 1999-12-14 2001-08-28 Sirf Technology, Inc. Strong signal cancellation to enhance processing of weak spread spectrum signal
US6975666B2 (en) * 1999-12-23 2005-12-13 Institut National De La Recherche Scientifique Interference suppression in CDMA systems
US6680727B2 (en) * 2000-10-17 2004-01-20 Qualcomm Incorporated Method and apparatus for canceling pilot interference in a CDMA communication system
US6580771B2 (en) * 2001-03-30 2003-06-17 Nokia Corporation Successive user data multipath interference cancellation
TWI261468B (en) * 2001-11-02 2006-09-01 Benq Corp Rake reception device and method
US7394879B2 (en) * 2001-11-19 2008-07-01 Tensorcomm, Inc. Systems and methods for parallel signal cancellation
US20040072553A1 (en) * 2002-09-20 2004-04-15 Xiaohui Wang Methods, systems, and computer program products for selecting delay positions for a RAKE receiver by adjusting the delay positions based on comparisons of signal to interference ratios and/or powers for multi-path signals over time
US20050123080A1 (en) * 2002-11-15 2005-06-09 Narayan Anand P. Systems and methods for serial cancellation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601046A (en) * 1984-05-15 1986-07-15 Halpern Peter H System for transmitting data through a troposcatter medium
US6032056A (en) * 1996-05-20 2000-02-29 Metawave Communications Corporation Cellular system signal conditioner

Also Published As

Publication number Publication date
WO2004073159A2 (en) 2004-08-26
US20040160924A1 (en) 2004-08-19
US7474690B2 (en) 2009-01-06
US20050031023A1 (en) 2005-02-10
US7394879B2 (en) 2008-07-01

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