BR9902994A - Detetores para sistemas cdma - Google Patents

Detetores para sistemas cdma

Info

Publication number
BR9902994A
BR9902994A BR9902994-4A BR9902994A BR9902994A BR 9902994 A BR9902994 A BR 9902994A BR 9902994 A BR9902994 A BR 9902994A BR 9902994 A BR9902994 A BR 9902994A
Authority
BR
Brazil
Prior art keywords
detectors
user
space
modality
respond
Prior art date
Application number
BR9902994-4A
Other languages
English (en)
Inventor
Howard C Huang
Lawrence Eugene Mailaender
Constantinos Basil Papadias
Original Assignee
Lucent Technologies 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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of BR9902994A publication Critical patent/BR9902994A/pt

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
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • 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
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • H04B1/71055—Joint detection techniques, e.g. linear detectors using minimum mean squared error [MMSE] detector
    • 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
    • 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
    • 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
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type

Landscapes

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

Abstract

<B>DETETORES PARA SISTEMAS CDMA<D> São descritos detetores de multiusuários de tempo-espaço linear que combinam processamento de conjunto, detecção de inclinação, e detecção de multiusuário e que atendem um critério de erro de média quadrada mínimo. As duas modalidades podem ser implementadas adaptavelmente de modo a responderem por fontes de interferência desconhecidas. A implementação adaptável da primeira modalidade de um detetor de tempo-espaço linear requer cálculos explícitos dos coeficientes de canal. por outro lado, a implementação adaptável da segunda modalidade não requer estas estimativas uma vez que podem ser adaptavelmente obtidas. Ambos estes detetores fornecem vantagens de desempenho significativas em relação aos detetores de tempo-espaço de usuário único e em relação a detetores de multiusuários que não respondem por interferência CDMA de fontes desconhecidas.
BR9902994-4A 1998-08-04 1999-07-27 Detetores para sistemas cdma BR9902994A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/129,479 US6301293B1 (en) 1998-08-04 1998-08-04 Detectors for CDMA systems

Publications (1)

Publication Number Publication Date
BR9902994A true BR9902994A (pt) 2000-08-01

Family

ID=22440164

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9902994-4A BR9902994A (pt) 1998-08-04 1999-07-27 Detetores para sistemas cdma

Country Status (9)

Country Link
US (1) US6301293B1 (pt)
EP (1) EP0978951B1 (pt)
JP (1) JP3553426B2 (pt)
KR (1) KR100317518B1 (pt)
CN (1) CN1278496C (pt)
AU (1) AU4245199A (pt)
BR (1) BR9902994A (pt)
CA (1) CA2279471C (pt)
DE (1) DE69924197T2 (pt)

Families Citing this family (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6501747B1 (en) * 1998-08-20 2002-12-31 Metawave Communications Corporation Manifold assisted channel estimation and demodulation for CDMA systems in fast fading environments
US20020110206A1 (en) * 1998-11-12 2002-08-15 Neal Becker Combined interference cancellation with FEC decoding for high spectral efficiency satellite communications
US6671338B1 (en) * 1998-11-12 2003-12-30 Hughes Electronics Corporation Combined interference cancellation with FEC decoding for high spectral efficiency satellite communications
US6128330A (en) 1998-11-24 2000-10-03 Linex Technology, Inc. Efficient shadow reduction antenna system for spread spectrum
US6570908B1 (en) * 1998-12-26 2003-05-27 Samsung Electronics, Co., Ltd. Apparatus and method for distortion compensation of high power amplifier in DS-multicode CDMA system
US6377611B1 (en) * 1999-02-01 2002-04-23 Industrial Technology Research Institute Apparatus and method for a DSSS/CDMA receiver
US6801565B1 (en) * 1999-06-25 2004-10-05 Ericsson Inc. Multi-stage rake combining methods and apparatus
US6714585B1 (en) 1999-06-25 2004-03-30 Ericsson Inc. Rake combining methods and apparatus using weighting factors derived from knowledge of spreading spectrum signal characteristics
US6856643B1 (en) * 1999-10-22 2005-02-15 Cwill Telecommunications, Inc. Communication system and method for performing fast symbol estimation for multiple access disperse channels
US6600796B1 (en) * 1999-11-12 2003-07-29 Lucent Technologies Inc. Method and apparatus for receiving wireless transmissions using multiple-antenna arrays
KR100625451B1 (ko) * 1999-12-18 2006-09-18 주식회사 케이티 스마트 안테나와 간섭제거기의 결합장치에서의 간섭신호제거방법
DE10003734A1 (de) * 2000-01-28 2001-08-02 Bosch Gmbh Robert Detektionsverfahren und -vorrichtung
US6963546B2 (en) * 2000-03-15 2005-11-08 Interdigital Technology Corp. Multi-user detection using an adaptive combination of joint detection and successive interface cancellation
AU2001250925A1 (en) 2000-03-21 2001-10-03 Telcordia Technologies, Inc. Combined adaptive spatio-temporal processing and multi-user detection for cdma wireless systems
US7391804B2 (en) * 2000-04-04 2008-06-24 Lot 41 Acquisition Foundation, Llc Spread spectrum communication method and system using diversity correlation and multi-user detection
US6618433B1 (en) * 2000-08-04 2003-09-09 Intel Corporation Family of linear multi-user detectors (MUDs)
FR2813464B1 (fr) 2000-08-29 2006-07-07 Mitsubishi Electric Inf Tech Methode de detection multi-utilisateur
FR2814014B1 (fr) 2000-09-14 2002-10-11 Mitsubishi Electric Inf Tech Methode de detection multi-utilisateur
US7020175B2 (en) * 2000-09-21 2006-03-28 Motorola, Inc. MMSE reception of DS-CDMA with transmit diversity
EP1207657B1 (en) * 2000-11-20 2007-10-31 Lucent Technologies Inc. Detection method and apparatus for phase-modulated CCK symbols with a correlator-bank
US6754253B2 (en) * 2000-11-29 2004-06-22 Ericsson Inc. Receiver architecture for transmit diversity in CDMA system
KR100714046B1 (ko) * 2000-12-12 2007-05-04 주식회사 케이티 반복적 간섭을 제거하기 위한 분산 측정 장치 및 그 방법
FR2818468B1 (fr) * 2000-12-20 2003-01-31 Mitsubishi Electric Inf Tech Methode et dispositif de detection multi-utilisateur en mode ds-cdma
US7061891B1 (en) 2001-02-02 2006-06-13 Science Applications International Corporation Method and system for a remote downlink transmitter for increasing the capacity and downlink capability of a multiple access interference limited spread-spectrum wireless network
US20050111529A1 (en) * 2001-02-22 2005-05-26 Prairiecomm, Inc. Tone detection using a cdma receiver
US7177344B2 (en) 2001-03-14 2007-02-13 Mercury Computer Systems, Inc. Wireless communication systems and methods for long-code communications for regenerative multiple user detection involving implicit waveform subtraction
US7376175B2 (en) 2001-03-14 2008-05-20 Mercury Computer Systems, Inc. Wireless communications systems and methods for cache enabled multiple processor based multiple user detection
FR2822568B1 (fr) * 2001-03-22 2003-06-06 Mitsubishi Electric Inf Tech Methode et dispositif d'egalisation de type gmmse
EP1386406A4 (en) * 2001-03-30 2009-06-03 Science Applic Int Corp MULTI-STAGE TRANSMISSION RECEIVER WITH CODE DIVISION MULTIPLE ACCESS
US7233620B2 (en) 2001-04-18 2007-06-19 Bae Systems Information And Electronic Systems Integration Inc. Bandwidth-efficient wireless network modem
US7486722B2 (en) 2001-04-18 2009-02-03 Bae Systems Information And Electronic Systems Integration Inc. Bandwidth efficient cable network modem
DE10123333A1 (de) * 2001-05-14 2002-11-28 Infineon Technologies Ag Mehrteilnehmer-Detektion mittels RAKE-Empfänger-Struktur
DE60107407T2 (de) * 2001-07-05 2005-05-19 Mitsubishi Electric Information Technology Centre Europe B.V. Mehrbenutzerdetektion in einem MC-CDMA Telekommunikationssystem
US6873646B2 (en) * 2001-07-12 2005-03-29 Industrial Technology Research Institute Perturbation apparatus and method for user detection in a multiple-access communication system
KR100763378B1 (ko) * 2001-07-27 2007-10-05 엘지전자 주식회사 다수의 안테나를 이용한 신호 송수신 방법 및 이를 위한시스템
US7006461B2 (en) * 2001-09-17 2006-02-28 Science Applications International Corporation Method and system for a channel selective repeater with capacity enhancement in a spread-spectrum wireless network
EP1300977A1 (en) * 2001-10-04 2003-04-09 Mitsubishi Electric Information Technology Centre Europe B.V. Parallel interference cancellation in an MC-CDMA telecommunication system
US7042926B2 (en) * 2001-11-21 2006-05-09 Intel Corporation Low complexity multiuser detector
US7203181B2 (en) * 2002-06-28 2007-04-10 Interdigital Technology Corporation CDMA system transmission matrix coefficient calculation
KR100450849B1 (ko) * 2002-09-03 2004-10-01 한국전자통신연구원 시공간 블록 코딩이 사용된 ｄｓ／ｃｄｍａ 통신 시스템을위한 적응 간섭 완화 수신 장치
KR20040036102A (ko) * 2002-10-23 2004-04-30 한국전자통신연구원 코드분할 다중접속에서의 다수 사용자 검출 시스템 및 그방법
AU2003237337A1 (en) 2002-11-19 2004-06-15 Bae Systems Information And Electronic Systems Integration Inc Bandwidth efficient wirless network modem
US7161973B2 (en) * 2002-12-17 2007-01-09 Sbc Properties, L.P. Pilot aided adaptive minimum mean square interference cancellation and detection
US7257377B2 (en) * 2003-02-18 2007-08-14 Qualcomm, Incorporated Systems and methods for improving channel estimation
US7372919B1 (en) 2003-04-10 2008-05-13 Marvell International Ltd. Space-time block decoder for a wireless communications system
US7787522B2 (en) * 2003-04-11 2010-08-31 Telefonaktiebolaget Lm Ericsson (Publ) Joint multi-code detectors in CDMA communications system
US7706347B2 (en) 2003-05-15 2010-04-27 Lg Electronics Inc. Signal processing apparatus and method using multi-output mobile communication system
KR100976707B1 (ko) 2003-06-04 2010-08-18 엘지전자 주식회사 다중사용자 검출장치 및 검출방법
KR100976708B1 (ko) 2003-06-04 2010-08-18 엘지전자 주식회사 다중사용자 검출장치 및 검출방법
US7245673B2 (en) * 2003-06-25 2007-07-17 Bae Systems Information And Electronic Systems Integration Inc. Windowed multiuser detection
WO2005032159A2 (en) * 2003-09-24 2005-04-07 Sarnoff Corporation Method and apparatus for performing modulation/demodulation in a wireless communication system
JP4847874B2 (ja) * 2004-01-30 2011-12-28 ユニベルシテ ラバル マルチユーザ適応型アレイ受信機および方法
TW200618559A (en) * 2004-08-03 2006-06-01 Agency Science Tech & Res Method for transmitting a digital signal, method for receiving a digital signal, transmitter and receiver
CN100373841C (zh) * 2004-08-27 2008-03-05 电子科技大学 一种多用户空时分组编码检测方法
US8107549B2 (en) * 2005-11-30 2012-01-31 Qualcomm, Incorporated Multi-stage receiver for wireless communication
CN100571098C (zh) * 2006-02-24 2009-12-16 中国科学院上海微系统与信息技术研究所 通信系统中低复杂度的极大似然检测方法及装置
CN100459446C (zh) * 2006-12-06 2009-02-04 重庆重邮信科通信技术有限公司 一种多径衰落信道的信道路径估计搜索方法
US7986919B2 (en) * 2008-03-19 2011-07-26 Telefonaktiebolaget Lm Ericsson (Publ) Simplified impairments matrix calculation for SINR estimation
EP2157717B1 (en) * 2008-08-19 2013-03-27 Telefonaktiebolaget LM Ericsson (publ) Method and system and device for CQI estimation disturbance cancellation
WO2010025749A1 (en) * 2008-09-04 2010-03-11 Telecom Italia S.P.A A method of processing received signals, corresponding receiver and computer program product therefor
BR112014009537A2 (pt) * 2011-10-19 2017-04-18 Optis Cellular Tech Llc método e aparelho para previsão de canal
CN103580721B (zh) * 2013-11-04 2015-12-02 复旦大学 一种复杂时变多径信道中多天线迭代多用户检测方法与装置
US20170170998A1 (en) * 2015-12-11 2017-06-15 Nokia Solutions And Networks Oy Pre-combiner interference removal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3122301B2 (ja) * 1994-03-02 2001-01-09 沖電気工業株式会社 空間ダイバーシチ受信装置
US5481572A (en) * 1994-08-02 1996-01-02 Ericsson Inc. Method of and apparatus for reducing the complexitiy of a diversity combining and sequence estimation receiver
US5680419A (en) * 1994-08-02 1997-10-21 Ericsson Inc. Method of and apparatus for interference rejection combining in multi-antenna digital cellular communications systems
US6006110A (en) * 1995-02-22 1999-12-21 Cisco Technology, Inc. Wireless communication network using time-varying vector channel equalization for adaptive spatial equalization
WO1997020400A1 (fr) * 1995-11-29 1997-06-05 Ntt Mobile Communications Network Inc. Appareil de reception en diversite et procede de commande
CA2180924C (en) * 1996-07-10 2003-04-08 Adnan Abu-Dayya Diversity path co-channel interference reduction
US6097773A (en) * 1997-05-22 2000-08-01 Nortel Networks Limited Co-channel interference reduction

Also Published As

Publication number Publication date
KR100317518B1 (ko) 2001-12-22
EP0978951A2 (en) 2000-02-09
EP0978951B1 (en) 2005-03-16
DE69924197D1 (de) 2005-04-21
CA2279471C (en) 2004-03-02
JP2000115028A (ja) 2000-04-21
US6301293B1 (en) 2001-10-09
JP3553426B2 (ja) 2004-08-11
KR20000016990A (ko) 2000-03-25
EP0978951A3 (en) 2003-09-17
CA2279471A1 (en) 2000-02-04
CN1278496C (zh) 2006-10-04
CN1247417A (zh) 2000-03-15
DE69924197T2 (de) 2006-03-23
AU4245199A (en) 2000-02-24

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]