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MXPA04006829A - Aparato y metodo para determinar pesos de combinador y relaciones de probabilidad log para simbolos transmitidos en un sistema de comunicacion inalambrico. - Google Patents

Aparato y metodo para determinar pesos de combinador y relaciones de probabilidad log para simbolos transmitidos en un sistema de comunicacion inalambrico.

Info

Publication number
MXPA04006829A
MXPA04006829A MXPA04006829A MXPA04006829A MXPA04006829A MX PA04006829 A MXPA04006829 A MX PA04006829A MX PA04006829 A MXPA04006829 A MX PA04006829A MX PA04006829 A MXPA04006829 A MX PA04006829A MX PA04006829 A MXPA04006829 A MX PA04006829A
Authority
MX
Mexico
Prior art keywords
likelihood ratios
log
wireless communication
communication system
symbols transmitted
Prior art date
Application number
MXPA04006829A
Other languages
English (en)
Inventor
Jesus Fernandez Corbaton Ivan
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 MXPA04006829A publication Critical patent/MXPA04006829A/es

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
    • H04B1/711—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
    • 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
    • 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
    • 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

Se presentan aqui metodos y aparatos para determinar las relaciones de probabilidad log (LLR) para simbolos de codigo. Los simbolos de piloto y codigo son transmitidos sobre canales de diversidad, los cuales pueden ser modelados como un sistema que varia lentamente con el tiempo. Se deriva una formulacion para un vector de ganancia multitrayectoria basada en el modelo que varia lentamente con el tiempo. El vector de ganancia multitrayectoria es entonces resuelto usando procedimientos iterativos (550). Usando el vector de ganancia multitrayectoria resuelto, se calculan las LLR para simbolos de codigo.
MXPA04006829A 2002-01-15 2003-01-07 Aparato y metodo para determinar pesos de combinador y relaciones de probabilidad log para simbolos transmitidos en un sistema de comunicacion inalambrico. MXPA04006829A (es)

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
MXPA04006829A true MXPA04006829A (es) 2004-10-11

Family

ID=21965028

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA04006829A MXPA04006829A (es) 2002-01-15 2003-01-07 Aparato y metodo para determinar pesos de combinador y relaciones de probabilidad log para simbolos transmitidos en un sistema de comunicacion inalambrico.

Country Status (14)

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

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WO2004055286A2 (en) * 2002-12-13 2004-07-01 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
WO2005125250A1 (en) 2004-06-22 2005-12-29 Nortel Networks Limited Soft handoff in ofdma system
US7668226B2 (en) 2005-02-23 2010-02-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for estimating gain offsets for amplitude-modulated communication signals
US7609754B2 (en) * 2005-08-30 2009-10-27 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for received communication signal processing
US7590167B2 (en) * 2005-08-30 2009-09-15 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for QAM demodulation in a generalized rake receiver
KR100895183B1 (ko) * 2006-02-03 2009-04-24 삼성전자주식회사 무선통신 시스템을 위한 주변 셀 간섭의 제거를 위한송수신 방법 및 장치
KR101489773B1 (ko) * 2007-02-28 2015-02-04 가부시키가이샤 엔티티 도코모 이동통신 시스템, 기지국 장치 및 방법
US8127216B2 (en) 2007-11-19 2012-02-28 Seagate Technology Llc Reduced state soft output processing
US20090132894A1 (en) * 2007-11-19 2009-05-21 Seagate Technology Llc Soft Output Bit Threshold Error Correction
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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Publication number Priority date Publication date Assignee Title
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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Also Published As

Publication number Publication date
JP4130632B2 (ja) 2008-08-06
EP1474887A1 (en) 2004-11-10
US20030133520A1 (en) 2003-07-17
DE60325336D1 (de) 2009-01-29
AU2003216045A1 (en) 2003-07-30
JP2005515698A (ja) 2005-05-26
TWI319667B (en) 2010-01-11
WO2003061180A1 (en) 2003-07-24
KR20040070313A (ko) 2004-08-06
CN1640047A (zh) 2005-07-13
KR100956460B1 (ko) 2010-05-07
CA2473233A1 (en) 2003-07-24
CN100369402C (zh) 2008-02-13
TW200307411A (en) 2003-12-01
ATE418195T1 (de) 2009-01-15
US6901103B2 (en) 2005-05-31
HK1077432A1 (en) 2006-02-10
EP1474887B1 (en) 2008-12-17
BR0306895A (pt) 2004-12-14

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