BR0007325A - Sistema de acesso múltiplo de divisão de código e método de operação com aquisição e processamento aperfeiçoado do sinal - Google Patents

Sistema de acesso múltiplo de divisão de código e método de operação com aquisição e processamento aperfeiçoado do sinal

Info

Publication number
BR0007325A
BR0007325A BR0007325-3A BR0007325A BR0007325A BR 0007325 A BR0007325 A BR 0007325A BR 0007325 A BR0007325 A BR 0007325A BR 0007325 A BR0007325 A BR 0007325A
Authority
BR
Brazil
Prior art keywords
signal
processing
signal acquisition
correlation matrix
acquisition
Prior art date
Application number
BR0007325-3A
Other languages
English (en)
Portuguese (pt)
Inventor
R Michael Buehrer
Shang-Chien Liu
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 BR0007325A publication Critical patent/BR0007325A/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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
    • 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
    • H04B1/7103—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
    • H04B1/71052—Joint detection techniques, e.g. linear detectors using decorrelation matrix
    • 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
    • H04B2201/70707—Efficiency-related aspects

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
BR0007325-3A 1999-12-07 2000-11-29 Sistema de acesso múltiplo de divisão de código e método de operação com aquisição e processamento aperfeiçoado do sinal BR0007325A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/455,947 US6549565B1 (en) 1999-12-07 1999-12-07 Code division multiple access system and method of operation with improved signal acquisition and processing

Publications (1)

Publication Number Publication Date
BR0007325A true BR0007325A (pt) 2001-08-07

Family

ID=23810848

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0007325-3A BR0007325A (pt) 1999-12-07 2000-11-29 Sistema de acesso múltiplo de divisão de código e método de operação com aquisição e processamento aperfeiçoado do sinal

Country Status (9)

Country Link
US (1) US6549565B1 (enExample)
EP (1) EP1107468A3 (enExample)
JP (1) JP3980263B2 (enExample)
KR (1) KR100757696B1 (enExample)
CN (1) CN1299199A (enExample)
AU (1) AU7203100A (enExample)
BR (1) BR0007325A (enExample)
CA (1) CA2326934A1 (enExample)
ID (1) ID27524A (enExample)

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US6940840B2 (en) 1995-06-30 2005-09-06 Interdigital Technology Corporation Apparatus for adaptive reverse power control for spread-spectrum communications
ZA965340B (en) 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US6885652B1 (en) 1995-06-30 2005-04-26 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US7020111B2 (en) * 1996-06-27 2006-03-28 Interdigital Technology Corporation System for using rapid acquisition spreading codes for spread-spectrum communications
US6697350B2 (en) * 1995-06-30 2004-02-24 Interdigital Technology Corporation Adaptive vector correlator for spread-spectrum communications
US6788662B2 (en) 1995-06-30 2004-09-07 Interdigital Technology Corporation Method for adaptive reverse power control for spread-spectrum communications
US7929498B2 (en) 1995-06-30 2011-04-19 Interdigital Technology Corporation Adaptive forward power control and adaptive reverse power control for spread-spectrum communications
US6831905B1 (en) 1995-06-30 2004-12-14 Interdigital Technology Corporation Spread spectrum system assigning information signals to message-code signals
US7123600B2 (en) 1995-06-30 2006-10-17 Interdigital Technology Corporation Initial power control for spread-spectrum communications
US7072380B2 (en) * 1995-06-30 2006-07-04 Interdigital Technology Corporation Apparatus for initial power control for spread-spectrum communications
AU2915201A (en) * 1999-12-30 2001-07-16 Morphics Technology, Inc. A fast initial acquisition and search device for a spread spectrum communicationsystem
FR2804560B1 (fr) * 2000-01-31 2006-08-04 Commissariat Energie Atomique Procede de radiocommunications amrc avec codes d'acces et recepteur correspondant
JP3805205B2 (ja) * 2000-04-06 2006-08-02 株式会社エヌ・ティ・ティ・ドコモ Ｃｄｍａセルラ方式における通信品質測定方法およびその装置
EP1158695B1 (en) * 2000-05-23 2008-08-06 NTT DoCoMo, Inc. Space multiplex radio communication method and apparatus
US8611311B2 (en) 2001-06-06 2013-12-17 Qualcomm Incorporated Method and apparatus for canceling pilot interference in a wireless communication system
JP3914424B2 (ja) * 2001-11-30 2007-05-16 速 松永 行列・逆行列を利用した変調・復調装置
FI20020953A0 (fi) 2002-05-21 2002-05-21 Nokia Corp Kanavaestimointi hajaspektrijärjestelmässä
KR100465297B1 (ko) * 2002-07-25 2005-01-13 엘지전자 주식회사 어레이 안테나를 이용한 무선통신시스템의 신호 수신 방법
US7746967B2 (en) * 2003-04-30 2010-06-29 Intel Corporation Beam-former and combiner for a multiple-antenna system
JP4259964B2 (ja) * 2003-09-12 2009-04-30 富士通株式会社 ＭＩＸＲ機能を有するＲａｋｅ受信機
EP1668786B1 (en) * 2003-09-23 2012-08-22 Nxp B.V. Initial synchronization for receivers
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
US8422955B2 (en) 2004-12-23 2013-04-16 Qualcomm Incorporated Channel estimation for interference cancellation
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
US9954574B2 (en) 2014-11-17 2018-04-24 Wichita State University Spreading sequence system for full connectivity relay network
CN115436976B (zh) * 2022-09-20 2025-12-16 中国星网网络应用有限公司 一种多天线卫星导航信号捕获方法、装置及设备

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Publication number Priority date Publication date Assignee Title
US4894842A (en) 1987-10-15 1990-01-16 The Charles Stark Draper Laboratory, Inc. Precorrelation digital spread spectrum receiver
US5488629A (en) 1993-02-17 1996-01-30 Matsushita Electric Industrial Co., Ltd. Signal processing circuit for spread spectrum communications
JP3181440B2 (ja) 1993-07-30 2001-07-03 松下通信工業株式会社 Ｃｄｍａ方式通信装置
JP2749780B2 (ja) 1994-09-30 1998-05-13 株式会社エイ・ティ・アール人間情報通信研究所 適応化型相互相関装置
US5568473A (en) 1994-12-08 1996-10-22 Comsat Corporation Method and apparatus for simple and efficient interference cancellation for chip synchronized CDMA
FI97583C (fi) * 1995-02-02 1997-01-10 Nokia Mobile Phones Ltd Tiedonsiirtomenetelmä, lähetin ja vastaanotin
EP0770289B1 (en) 1995-05-12 2002-11-27 Koninklijke Philips Electronics N.V. A direct-sequence spread spectrum communication system, a primary radio station, and a secondary radio station
US5918154A (en) 1995-08-23 1999-06-29 Pcs Wireless, Inc. Communications systems employing antenna diversity
US5872776A (en) 1995-11-22 1999-02-16 Yang; Lin-Lang Signal detection and interference cancellation based on simplified matrix inversion for CDMA applications
FI101659B (fi) * 1996-07-12 1998-07-31 Nokia Mobile Phones Ltd Viiveen estimointimenetelmä ja vastaanotin
US5822380A (en) 1996-08-12 1998-10-13 Ericsson Inc. Apparatus and method for joint channel estimation
US5870378A (en) 1996-08-20 1999-02-09 Lucent Technologies Inc. Method and apparatus of a multi-code code division multiple access receiver having a shared accumulator circuits
US5905721A (en) 1996-09-26 1999-05-18 Cwill Telecommunications, Inc. Methods for channel estimation and signal detection of CDMA signals
US5832044A (en) 1996-09-27 1998-11-03 Elvino S. Sousa Transmitter antenna diversity and fading-resistant modulation for wireless communication systems
US5848105A (en) 1996-10-10 1998-12-08 Gardner; William A. GMSK signal processors for improved communications capacity and quality

Also Published As

Publication number Publication date
JP3980263B2 (ja) 2007-09-26
EP1107468A2 (en) 2001-06-13
KR100757696B1 (ko) 2007-09-13
CN1299199A (zh) 2001-06-13
EP1107468A3 (en) 2004-01-02
JP2001211104A (ja) 2001-08-03
US6549565B1 (en) 2003-04-15
AU7203100A (en) 2001-06-14
KR20010062214A (ko) 2001-07-07
CA2326934A1 (en) 2001-06-07
ID27524A (id) 2001-04-12

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Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]
B15K Others concerning applications: alteration of classification

Ipc: H04B 1/7075 (2011.01), H04B 1/7105 (2011.01), H04B