WO1998043362A3 - Method and apparatus for reducing spread-spectrum noise - Google Patents

Method and apparatus for reducing spread-spectrum noise Download PDF

Info

Publication number
WO1998043362A3
WO1998043362A3 PCT/IL1998/000129 IL9800129W WO9843362A3 WO 1998043362 A3 WO1998043362 A3 WO 1998043362A3 IL 9800129 W IL9800129 W IL 9800129W WO 9843362 A3 WO9843362 A3 WO 9843362A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
user signal
spread
spectrum noise
spectrum
Prior art date
Application number
PCT/IL1998/000129
Other languages
French (fr)
Other versions
WO1998043362A2 (en
Inventor
Daniel Yellin
Original Assignee
Dspc Israel Ltd
Daniel Yellin
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 Dspc Israel Ltd, Daniel Yellin filed Critical Dspc Israel Ltd
Priority to AU64174/98A priority Critical patent/AU6417498A/en
Priority to JP54537298A priority patent/JP4177901B2/en
Priority to CA 2283848 priority patent/CA2283848A1/en
Priority to EP98909717A priority patent/EP0970573A4/en
Priority to KR1019997008755A priority patent/KR100781415B1/en
Publication of WO1998043362A2 publication Critical patent/WO1998043362A2/en
Publication of WO1998043362A3 publication Critical patent/WO1998043362A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or 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
    • H04B1/69—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
    • 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
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Abstract

Apparatus (10) and a method for receiving spread-spectrum signals is provided. The method includes the steps of detecting a noisy user signal from a spread-spectrum signal including at least a first user signal (including data therein) and at least one pilot signal, and removing an interference effect of the pilot signal on the first user signal from the noisy user signal thereby to create a noise reduced user signal (X'(n)).
PCT/IL1998/000129 1997-03-26 1998-03-23 Method and apparatus for reducing spread-spectrum noise WO1998043362A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU64174/98A AU6417498A (en) 1997-03-26 1998-03-23 Method and apparatus for reducing spread-spectrum noise
JP54537298A JP4177901B2 (en) 1997-03-26 1998-03-23 Method and apparatus for reducing spread spectrum noise
CA 2283848 CA2283848A1 (en) 1997-03-26 1998-03-23 Method and apparatus for reducing spread-spectrum noise
EP98909717A EP0970573A4 (en) 1997-03-26 1998-03-23 Method and apparatus for reducing spread-spectrum noise
KR1019997008755A KR100781415B1 (en) 1997-03-26 1998-03-23 Method and apparatus for reducing spread-spectrum noise

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL12053897A IL120538A (en) 1997-03-26 1997-03-26 Method and apparatus for reducing spread-spectrum noise
IL120538 1997-03-26

Publications (2)

Publication Number Publication Date
WO1998043362A2 WO1998043362A2 (en) 1998-10-01
WO1998043362A3 true WO1998043362A3 (en) 1999-02-11

Family

ID=11069967

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL1998/000129 WO1998043362A2 (en) 1997-03-26 1998-03-23 Method and apparatus for reducing spread-spectrum noise

Country Status (8)

Country Link
US (1) US6034986A (en)
EP (1) EP0970573A4 (en)
JP (1) JP4177901B2 (en)
KR (1) KR100781415B1 (en)
AU (1) AU6417498A (en)
CA (1) CA2283848A1 (en)
IL (1) IL120538A (en)
WO (1) WO1998043362A2 (en)

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US6507602B1 (en) * 1999-01-07 2003-01-14 Ericsson, Inc. Smoothing receiver channel estimates using spectral estimation
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US6665288B1 (en) 1999-11-08 2003-12-16 Ericsson Inc. Method and apparatus for reducing synchronization code interference in CDMA communications systems
WO2001035541A2 (en) * 1999-11-11 2001-05-17 Siemens Aktiengesellschaft Method for decoding a spread-coded signal and corresponding decoding device
US6603823B1 (en) * 1999-11-12 2003-08-05 Intel Corporation Channel estimator
EP1117186A1 (en) * 2000-01-14 2001-07-18 Lucent Technologies Inc. Adaptive code-tracking RAKE receiver for direct-sequence code-division multiple access (cdma) communications
EP1117185A1 (en) * 2000-01-14 2001-07-18 Lucent Technologies Inc. Method and rake receiver for code-tracking in CDMA communication systems
EP1128564A1 (en) * 2000-02-28 2001-08-29 Lucent Technologies Inc. Multi-user detection CDMA receivers in mobile telecommunications systems
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US6618433B1 (en) 2000-08-04 2003-09-09 Intel Corporation Family of linear multi-user detectors (MUDs)
CA2323164A1 (en) * 2000-10-11 2002-04-11 Ramesh Mantha Method, system and apparatus for improving reception in multiple access communication systems
US6680727B2 (en) * 2000-10-17 2004-01-20 Qualcomm Incorporated Method and apparatus for canceling pilot interference in a CDMA communication system
GB2369018A (en) * 2000-11-10 2002-05-15 Ubinetics Ltd Control channel interference cancellation for a CDMA receiver
US6865218B1 (en) * 2000-11-27 2005-03-08 Ericsson Inc. Multipath interference reduction for a CDMA system
JP2002232397A (en) * 2001-01-31 2002-08-16 Ntt Docomo Inc Receiving processing method and receiving equipment in mobile communication system
WO2002073230A2 (en) * 2001-03-14 2002-09-19 Mercury Computer Systems, Inc. Wireless communications methods and systems for short-code and other spread spectrum waveform processing
US7697594B2 (en) * 2001-03-30 2010-04-13 Texas Instruments Incorporated Method and apparatus for regenerative based interference cancellation within a communication system
US6996159B2 (en) * 2001-05-17 2006-02-07 Intel Corporation Reducing spread spectrum noise
JP3345406B1 (en) * 2001-05-25 2002-11-18 松下電器産業株式会社 Wireless receiving apparatus and wireless receiving method
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
US7450631B2 (en) * 2001-10-26 2008-11-11 Intel Corporation Metric correction for multi user detection, for long codes DS-CDMA
US6661809B2 (en) 2001-11-14 2003-12-09 Motorola, Inc. Methods and communications terminals for increasing capacity CDMA communications networks
US7042926B2 (en) * 2001-11-21 2006-05-09 Intel Corporation Low complexity multiuser detector
JP2003174400A (en) * 2001-12-06 2003-06-20 Ntt Docomo Inc Mobile communication terminal, interference removing system, interference removing method and base station
SG114534A1 (en) * 2002-03-12 2005-09-28 Oki Techno Ct Singapore Pte Reduced-complexity multipath interference cancellation
US7406065B2 (en) * 2002-03-14 2008-07-29 Qualcomm, Incorporated Method and apparatus for reducing inter-channel interference in a wireless communication system
US7103094B2 (en) * 2002-08-29 2006-09-05 Broadcom Corporation Adaptive pilot interference cancellation in CDMA systems
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US7215705B2 (en) * 2003-03-17 2007-05-08 Intel Corporation Reducing phase noise in phase-encoded communications signals
WO2004105264A2 (en) * 2003-05-23 2004-12-02 Axiocom Inc. System for equalisation using pilot cancellation
WO2005011167A1 (en) * 2003-07-29 2005-02-03 Fujitsu Limited Pilot multiplexing method and transmission/reception device in ofdm system
US7428260B2 (en) * 2003-10-30 2008-09-23 Marvell World Trade Ltd. Unified MMSE equalization and multi-user detection approach for use in a CDMA system
JP2005354255A (en) * 2004-06-09 2005-12-22 Fujitsu Ltd Device and method for eliminating interference
US8442441B2 (en) * 2004-12-23 2013-05-14 Qualcomm Incorporated Traffic interference cancellation
US8099123B2 (en) * 2004-12-23 2012-01-17 Qualcomm Incorporated Adaptation of transmit subchannel gains in a system with interference cancellation
US8406695B2 (en) * 2004-12-23 2013-03-26 Qualcomm Incorporated Joint interference cancellation of pilot, overhead and traffic channels
US8422955B2 (en) * 2004-12-23 2013-04-16 Qualcomm Incorporated Channel estimation for interference cancellation
US7986680B2 (en) * 2005-04-28 2011-07-26 Qualcomm Incorporated Transmit format selection with consideration for resource reuse
US20070071145A1 (en) * 2005-09-23 2007-03-29 Yona Perets Method and apparatus to correct channel quality indicator estimation
US8472877B2 (en) * 2005-10-24 2013-06-25 Qualcomm Incorporated Iterative interference cancellation system and method
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US5235612A (en) * 1990-12-21 1993-08-10 Motorola, Inc. Method and apparatus for cancelling spread-spectrum noise
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US5410750A (en) * 1992-02-24 1995-04-25 Raytheon Company Interference suppressor for a radio receiver
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US5754583A (en) * 1996-05-06 1998-05-19 Motorola, Inc. Communication device and method for determining finger lock status in a radio receiver

Also Published As

Publication number Publication date
US6034986A (en) 2000-03-07
CA2283848A1 (en) 1998-10-01
IL120538A0 (en) 1997-07-13
JP4177901B2 (en) 2008-11-05
KR20010005687A (en) 2001-01-15
EP0970573A2 (en) 2000-01-12
WO1998043362A2 (en) 1998-10-01
KR100781415B1 (en) 2007-12-03
JP2001523408A (en) 2001-11-20
EP0970573A4 (en) 2000-05-17
IL120538A (en) 2000-11-21
AU6417498A (en) 1998-10-20

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