ECSP077211A - METHOD AND APPLIANCE TO CANCEL PILOT INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - Google Patents

METHOD AND APPLIANCE TO CANCEL PILOT INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM

Info

Publication number
ECSP077211A
ECSP077211A EC2007007211A ECSP077211A ECSP077211A EC SP077211 A ECSP077211 A EC SP077211A EC 2007007211 A EC2007007211 A EC 2007007211A EC SP077211 A ECSP077211 A EC SP077211A EC SP077211 A ECSP077211 A EC SP077211A
Authority
EC
Ecuador
Prior art keywords
pilot
pilot interference
signal
data samples
wireless communication
Prior art date
Application number
EC2007007211A
Other languages
Spanish (es)
Inventor
Jilei Hou
Paul E Bender
Alessandro Vanelli Coralli
Henry David Pfister
John E Smee
Roberto Padovani
Brian K Butler
Jeffrey A Levin
Thomas B Wilborn
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of ECSP077211A publication Critical patent/ECSP077211A/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
    • 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

Landscapes

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

Abstract

Métodos y sistemas para estimar y cancelar la interferencia piloto en un sistema de comunicación inalámbrica (por ejemplo CDMA). En un método, una señal recibida comprendida de un número de instancias de señal, cada una incluyendo un piloto, es inicuamente procesada para proporcionar muestras de datos. Cada interferencia piloto de la instancia de señal puede ser estimada mediante la diseminación de las muestras de datos con una secuencia diseminadora para la instancia de señal, canalizando los datos de-diseminados para proporcionar símbolos pilotos, filtrar los símbolos pilotos para estimar la respuesta del canal a la instancia de señal, y multiplicar la respuesta del canal estimada con la secuencia de diseminación. Los estimados de la interferencia piloto debido a una pluralidad de multi-direccionales interferentes se acumulan para derivar la interferencia piloto total, la cual se resta de las muestras de datos para proporcionar muestras de datos piloto-canceladas. Estas muestras son entonces procesadas para derivar datos de-modulados para cada una de al menos una instancia de señal (deseado) en la señal recibidaMethods and systems for estimating and canceling pilot interference in a wireless communication system (for example CDMA). In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each pilot interference of the signal instance can be estimated by disseminating the data samples with a disseminating sequence to the signal instance, channeling the de-disseminated data to provide pilot symbols, filtering the pilot symbols to estimate the channel response to the signal instance, and multiply the estimated channel response with the dissemination sequence. Estimates of the pilot interference due to a plurality of multi-directional interferers are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive de-modulated data for each of at least one (desired) signal instance in the received signal.

EC2007007211A 2004-06-30 2007-01-29 METHOD AND APPLIANCE TO CANCEL PILOT INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM ECSP077211A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58452704P 2004-06-30 2004-06-30

Publications (1)

Publication Number Publication Date
ECSP077211A true ECSP077211A (en) 2007-02-28

Family

ID=34993281

Family Applications (1)

Application Number Title Priority Date Filing Date
EC2007007211A ECSP077211A (en) 2004-06-30 2007-01-29 METHOD AND APPLIANCE TO CANCEL PILOT INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM

Country Status (13)

Country Link
EP (1) EP1766801A1 (en)
JP (1) JP4659828B2 (en)
CN (1) CN101027850B (en)
AU (1) AU2005260653A1 (en)
BR (1) BRPI0512822A (en)
CA (1) CA2572090A1 (en)
EC (1) ECSP077211A (en)
IL (1) IL180341A0 (en)
MX (1) MX2007000276A (en)
NO (1) NO20070422L (en)
RU (1) RU2007103333A (en)
WO (1) WO2006004948A1 (en)
ZA (1) ZA200700673B (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8611305B2 (en) 2005-08-22 2013-12-17 Qualcomm Incorporated Interference cancellation for wireless communications
US9071344B2 (en) 2005-08-22 2015-06-30 Qualcomm Incorporated Reverse link interference cancellation
US8737451B2 (en) 2007-03-09 2014-05-27 Qualcomm Incorporated MMSE MUD in 1x mobiles
US8571553B2 (en) 2007-07-16 2013-10-29 Qualcomm Incorporated Methods and apparatus for resolving pilot pseudorandom noise code conflicts in a communication system
US8995417B2 (en) 2008-06-09 2015-03-31 Qualcomm Incorporated Increasing capacity in wireless communication
US9277487B2 (en) 2008-08-01 2016-03-01 Qualcomm Incorporated Cell detection with interference cancellation
US9237515B2 (en) 2008-08-01 2016-01-12 Qualcomm Incorporated Successive detection and cancellation for cell pilot detection
US9160577B2 (en) 2009-04-30 2015-10-13 Qualcomm Incorporated Hybrid SAIC receiver
US8787509B2 (en) 2009-06-04 2014-07-22 Qualcomm Incorporated Iterative interference cancellation receiver
US8831149B2 (en) 2009-09-03 2014-09-09 Qualcomm Incorporated Symbol estimation methods and apparatuses
EP2505017B1 (en) 2009-11-27 2018-10-31 Qualcomm Incorporated Increasing capacity in wireless communications
KR101376676B1 (en) 2009-11-27 2014-03-20 퀄컴 인코포레이티드 Increasing capacity in wireless communications
US8817924B2 (en) * 2010-09-23 2014-08-26 Qualcomm Incorporated Iterative pilot tone cancellation for improved channel estimation and decoding
CN102195673A (en) * 2011-02-25 2011-09-21 福建三元达通讯股份有限公司 Method for eliminating pilot pollution
JP5423866B2 (en) * 2012-11-20 2014-02-19 ヤマハ株式会社 Correlator
JP6518657B2 (en) 2013-06-25 2019-05-22 エルジー エレクトロニクス インコーポレイティド Method and apparatus for measuring self-interference in wireless connection system supporting full duplex wireless system
US20150134582A1 (en) * 2013-11-08 2015-05-14 Qualcomm Incorporated Implementing synaptic learning using replay in spiking neural networks
CN104753558A (en) * 2013-12-31 2015-07-01 中兴通讯股份有限公司 Descrambling and dispreading method and device
US11234147B2 (en) * 2016-09-30 2022-01-25 Telefonaktiebolaget Lm Ericsson (Publ) Coherence bandwidth adaptive CSI reporting
CN111323794B (en) * 2020-03-21 2023-05-05 哈尔滨工程大学 A Cyclic Frequency Modulation Interference Elimination Method Based on Periodic Resampling
CN113507427B (en) * 2021-08-18 2023-07-25 南京天际易达通信技术有限公司 Carrier tracking method and device suitable for pi/4-DQPSK (differential Quadrature phase Shift keying) and readable storage medium
CN114978821B (en) * 2022-05-18 2024-04-23 西安交通大学 Cooperative channel estimation method for 6G intelligent reflective surface assisted communication system
CN114710382B (en) * 2022-06-07 2022-08-26 四川创智联恒科技有限公司 Interference elimination method for time division duplex multi-antenna system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067292A (en) * 1996-08-20 2000-05-23 Lucent Technologies Inc Pilot interference cancellation for a coherent wireless code division multiple access receiver
JP2967571B1 (en) * 1998-05-01 1999-10-25 日本電気株式会社 CDMA multi-user receiving apparatus and communication system
US7190749B2 (en) * 2001-06-06 2007-03-13 Qualcomm Incorporated Method and apparatus for canceling pilot interference in a wireless communication system
CN1131615C (en) * 2002-02-26 2003-12-17 东南大学 Pilot interference cancellation method of code division multiple address system

Also Published As

Publication number Publication date
AU2005260653A1 (en) 2006-01-12
CA2572090A1 (en) 2006-01-12
BRPI0512822A (en) 2008-04-08
JP4659828B2 (en) 2011-03-30
JP2008505554A (en) 2008-02-21
CN101027850B (en) 2011-09-28
MX2007000276A (en) 2007-06-15
NO20070422L (en) 2007-03-30
EP1766801A1 (en) 2007-03-28
WO2006004948A1 (en) 2006-01-12
ZA200700673B (en) 2008-09-25
RU2007103333A (en) 2008-08-10
IL180341A0 (en) 2007-07-04
CN101027850A (en) 2007-08-29

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