BR0306895A - Equipamento e método para determinar pesos de combinador e razões de verossimilhança para sìmbolos transmitidos em um sistema de comunicação sem fio - Google Patents

Equipamento e método para determinar pesos de combinador e razões de verossimilhança para sìmbolos transmitidos em um sistema de comunicação sem fio

Info

Publication number
BR0306895A
BR0306895A BR0306895-1A BR0306895A BR0306895A BR 0306895 A BR0306895 A BR 0306895A BR 0306895 A BR0306895 A BR 0306895A BR 0306895 A BR0306895 A BR 0306895A
Authority
BR
Brazil
Prior art keywords
likelihood ratios
equipment
wireless communication
communication system
symbols transmitted
Prior art date
Application number
BR0306895-1A
Other languages
English (en)
Inventor
Srikant Jayaraman
Ivan Jesus Fernandez-Corbaton
John E Smee
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 BR0306895A publication Critical patent/BR0306895A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • H04L1/005—Iterative decoding, including iteration between signal detection and decoding operation
    • 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
    • H04B1/7097—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
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • 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
    • H04B1/71057—Joint detection techniques, e.g. linear detectors using maximum-likelihood sequence estimation [MLSE]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Artificial Intelligence (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Error Detection And Correction (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

"EQUIPAMENTO E MéTODO PARA DETERMINAR PESOS DE COMBINADOR E RAZõES DE VEROSSIMILHANçA PARA SìMBOLOS TRANSMITIDOS EM UM SISTEMA DE COMUNICAçãO SEM FIO". São apresentados, nesta invenção, métodos e equipamentos para determinar razões de verossimilhança (LLRs) para símbolos de código. Os símbolos piloto e de código são transmitidos através de canais de diversidade, os quais podem ser modelados como um sistema lentamente variante no tempo. Uma formulação para um vetor de ganho de multipercurso é obtida nesta invenção com base no modelo lentamente variante no tempo. O vetor de ganho de multipercurso é então resolvido utilizando procedimentos iterativos (550). Ao utilizar o vetor de ganho de multipercurso resolvido, as LLRs são computadas para símbolos de código.
BR0306895-1A 2002-01-15 2003-01-07 Equipamento e método para determinar pesos de combinador e razões de verossimilhança para sìmbolos transmitidos em um sistema de comunicação sem fio BR0306895A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/050,399 US6901103B2 (en) 2002-01-15 2002-01-15 Determining combiner weights and log likelihood ratios for symbols transmitted on diversity channels
PCT/US2003/000497 WO2003061180A1 (en) 2002-01-15 2003-01-07 Apparatus and method for determining combiner weights and log-likelihood ratios for symbols transmitted in a wireless communication system

Publications (1)

Publication Number Publication Date
BR0306895A true BR0306895A (pt) 2004-12-14

Family

ID=21965028

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0306895-1A BR0306895A (pt) 2002-01-15 2003-01-07 Equipamento e método para determinar pesos de combinador e razões de verossimilhança para sìmbolos transmitidos em um sistema de comunicação sem fio

Country Status (14)

Country Link
US (1) US6901103B2 (pt)
EP (1) EP1474887B1 (pt)
JP (1) JP4130632B2 (pt)
KR (1) KR100956460B1 (pt)
CN (1) CN100369402C (pt)
AT (1) ATE418195T1 (pt)
AU (1) AU2003216045A1 (pt)
BR (1) BR0306895A (pt)
CA (1) CA2473233A1 (pt)
DE (1) DE60325336D1 (pt)
HK (1) HK1077432A1 (pt)
MX (1) MXPA04006829A (pt)
TW (1) TWI319667B (pt)
WO (1) WO2003061180A1 (pt)

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AU2003302940A1 (en) * 2002-12-13 2004-07-09 G-P Gypsum Corporation Gypsum panel having UV-cured moisture resistant coating
DE10340397A1 (de) * 2003-09-02 2005-04-07 Siemens Ag §erfahren zum Übertragen von Signalen in einem Funkkommunikationssystem sowie entsprechende Sendestation und Empfangsstation
DE10341108A1 (de) * 2003-09-05 2005-04-07 Infineon Technologies Ag Verfahren und Vorrichtung zur Erzeugung von logarithmischen Wahrscheinlichkeitsverhältnissen bei Rake-Demodulatoren
CN101156322B (zh) 2004-06-22 2013-11-20 苹果公司 用于在无线通信网络中实现反馈的方法和系统
US7668226B2 (en) 2005-02-23 2010-02-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for estimating gain offsets for amplitude-modulated communication signals
US7590167B2 (en) * 2005-08-30 2009-09-15 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for QAM demodulation in a generalized rake receiver
US7609754B2 (en) * 2005-08-30 2009-10-27 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for received communication signal processing
KR100895183B1 (ko) * 2006-02-03 2009-04-24 삼성전자주식회사 무선통신 시스템을 위한 주변 셀 간섭의 제거를 위한송수신 방법 및 장치
CN101663849B (zh) * 2007-02-28 2013-01-23 株式会社Ntt都科摩 在移动通信系统中使用的基站装置、用户装置以及方法
US20090132894A1 (en) * 2007-11-19 2009-05-21 Seagate Technology Llc Soft Output Bit Threshold Error Correction
US8127216B2 (en) 2007-11-19 2012-02-28 Seagate Technology Llc Reduced state soft output processing
US8428547B2 (en) 2009-10-22 2013-04-23 Korea Advanced Institute Of Science And Technology Signaling in wireless communication systems
CN104639284B (zh) * 2015-01-05 2018-10-02 华为技术有限公司 一种译码处理方法及装置
US10212020B2 (en) * 2015-06-09 2019-02-19 Samsung Electronics Co., Ltd Apparatus and method for superposition transmissions
DE102016215640A1 (de) * 2016-08-19 2018-02-22 Robert Bosch Gmbh Verfahren, Sensor und Steuergerät zum Übertragen eines Datenpakets von einem Sensor zu einem Steuergerät

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US4901307A (en) 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5103459B1 (en) 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
US6396804B2 (en) * 1996-05-28 2002-05-28 Qualcomm Incorporated High data rate CDMA wireless communication system
US6006075A (en) * 1996-06-18 1999-12-21 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for transmitting communication signals using transmission space diversity and frequency diversity
JPH11266180A (ja) * 1998-03-18 1999-09-28 Fujitsu Ltd 無線基地局のアレーアンテナシステム
US6434203B1 (en) * 1999-02-26 2002-08-13 Qualcomm, Incorporated Memory architecture for map decoder
US6377607B1 (en) * 1999-05-13 2002-04-23 Qualcomm Incorporated System and method for performing accurate demodulation of turbo-encoded signals via pilot assisted coherent demodulation
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
US6594318B1 (en) * 1999-12-02 2003-07-15 Qualcomm Incorporated Method and apparatus for computing soft decision input metrics to a turbo decoder
JP4389373B2 (ja) * 2000-10-11 2009-12-24 ソニー株式会社 ２元巡回符号を反復型復号するための復号器
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US7170924B2 (en) * 2001-05-17 2007-01-30 Qualcomm, Inc. System and method for adjusting combiner weights using an adaptive algorithm in wireless communications system

Also Published As

Publication number Publication date
CA2473233A1 (en) 2003-07-24
HK1077432A1 (en) 2006-02-10
WO2003061180A1 (en) 2003-07-24
CN100369402C (zh) 2008-02-13
TW200307411A (en) 2003-12-01
ATE418195T1 (de) 2009-01-15
TWI319667B (en) 2010-01-11
DE60325336D1 (de) 2009-01-29
KR20040070313A (ko) 2004-08-06
EP1474887A1 (en) 2004-11-10
JP2005515698A (ja) 2005-05-26
JP4130632B2 (ja) 2008-08-06
US20030133520A1 (en) 2003-07-17
US6901103B2 (en) 2005-05-31
CN1640047A (zh) 2005-07-13
AU2003216045A1 (en) 2003-07-30
KR100956460B1 (ko) 2010-05-07
MXPA04006829A (es) 2004-10-11
EP1474887B1 (en) 2008-12-17

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