BR0116978A - Método de estimativa de canal de desvanecimento em sistema cdma e aparelho para o mesmo - Google Patents

Método de estimativa de canal de desvanecimento em sistema cdma e aparelho para o mesmo

Info

Publication number
BR0116978A
BR0116978A BR0116978-5A BR0116978A BR0116978A BR 0116978 A BR0116978 A BR 0116978A BR 0116978 A BR0116978 A BR 0116978A BR 0116978 A BR0116978 A BR 0116978A
Authority
BR
Brazil
Prior art keywords
channel
fading
prediction
mobile station
fading channel
Prior art date
Application number
BR0116978-5A
Other languages
English (en)
Inventor
Jiang Li
Yu Jin
Sheng Liu
Original Assignee
Huawei Tech Co Ltd
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 Huawei Tech Co Ltd filed Critical Huawei Tech Co Ltd
Publication of BR0116978A publication Critical patent/BR0116978A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/025—Channel estimation channel estimation algorithms using least-mean-square [LMS] method
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • 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
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Error Detection And Correction (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

"MéTODO DE ESTIMATIVA DE CANAL DE DESVANECIMENTO EM SISTEMA CDMA E APARELHO PARA O MESMO". Um método para estimar o canal de desvanecimento plano em um sistema de comunicação de acesso múltiplo de divisão de código e um aparelho da mesma, é implementado pelo emprego de uma técnica de prognóstico avançada adaptativa baseada no filtro de treliça adaptativo, e na técnica de detecção de probabilidade máxima do algoritmo de Viterbi, o filtro de treliça adaptativo sendo usado para diagnosticar o desvanecimento de canal baseado no critério LS, o algoritmo de Viterbi sendo provido pela técnica de detecção de probabilidade máxima baseada no valor de desvanecimento de canal diagnosticado, e a estimativa final e decisão para transmissão de sinais podem ser obtidas. Quando está operando em um canal de desvanecimento rápido, os resultados da estimativa de canal e a decisão de seq³ência da invenção são precisos. Ele trilha as mudanças rapidamente, e supera o efeito do desvanecimento rápido devido a velocidade aumentada da estação móvel; desse modo os requerimentos da velocidade móvel e a performance de recepção correspondente pela terceira geração da comunicação móvel podem ser satisfeitos.
BR0116978-5A 2001-04-16 2001-04-16 Método de estimativa de canal de desvanecimento em sistema cdma e aparelho para o mesmo BR0116978A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2001/000556 WO2002091643A1 (en) 2001-04-16 2001-04-16 Estimation method of flat fading channel in cdma communication system and apparatus for the same

Publications (1)

Publication Number Publication Date
BR0116978A true BR0116978A (pt) 2004-06-29

Family

ID=32514434

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0116978-5A BR0116978A (pt) 2001-04-16 2001-04-16 Método de estimativa de canal de desvanecimento em sistema cdma e aparelho para o mesmo

Country Status (8)

Country Link
US (1) US7277472B2 (pt)
EP (1) EP1383263B1 (pt)
CN (1) CN1110163C (pt)
AT (1) ATE308835T1 (pt)
BR (1) BR0116978A (pt)
DE (1) DE60114670T2 (pt)
ES (1) ES2252249T3 (pt)
WO (1) WO2002091643A1 (pt)

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US7545849B1 (en) 2003-03-28 2009-06-09 Google Inc. Signal spectrum spreading and combining system and method
US8385470B2 (en) * 2000-12-05 2013-02-26 Google Inc. Coding a signal with a shuffled-Hadamard function
US8374218B2 (en) 2000-12-05 2013-02-12 Google Inc. Combining signals with a shuffled-hadamard function
US7453921B1 (en) * 2001-12-11 2008-11-18 Google Inc. LPC filter for removing periodic and quasi-periodic interference from spread spectrum signals
US7352833B2 (en) 2002-11-18 2008-04-01 Google Inc. Method and system for temporal autocorrelation filtering
US7437135B2 (en) 2003-10-30 2008-10-14 Interdigital Technology Corporation Joint channel equalizer interference canceller advanced receiver
US7400692B2 (en) 2004-01-14 2008-07-15 Interdigital Technology Corporation Telescoping window based equalization
DE102004026072B4 (de) * 2004-05-25 2007-02-15 Micronas Gmbh Verfahren und Vorrichtung zur bewegungskompensierten Rauschschätzung bei mobilen drahtlosen Übertragungssystemen
US20060072449A1 (en) * 2004-10-06 2006-04-06 Mark Kent Method and system for channel equalization
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US7471746B2 (en) * 2004-10-28 2008-12-30 Seagate Technology, Llc Whitening of data-dependent, non-stationary noise in an inter-symbol interference channel detector
EP1839418A1 (en) * 2005-01-12 2007-10-03 Nxp B.V. Method and apparatus for channel estimation
US7734466B2 (en) * 2005-06-20 2010-06-08 Motorola, Inc. Reduced complexity recursive least square lattice structure adaptive filter by means of limited recursion of the backward and forward error prediction squares
CN100466505C (zh) * 2006-03-28 2009-03-04 华为技术有限公司 实现高速下行链路分组调度的方法和装置
JP5105834B2 (ja) * 2006-11-17 2012-12-26 キヤノン株式会社 制御装置及びその制御方法、通信装置及びその制御方法、通信システム、及び、プログラム
CA2571385C (en) * 2006-12-18 2015-11-24 University Of Waterloo Adaptive channel prediction system and method
CN101257323B (zh) * 2008-04-19 2011-11-16 桂林电子科技大学 脉冲超宽带信号检测中分离多径和多址干扰的方法
US9021342B2 (en) * 2009-10-01 2015-04-28 Stmicroelectronics, Inc. Methods to improve ACS performance
CN101765161B (zh) * 2009-12-29 2015-08-12 中兴通讯股份有限公司 一种链路自适应方法及装置
CN102263717B (zh) * 2010-05-26 2014-03-12 北京创毅视讯科技有限公司 信号解调装置和信号解调方法
US9674718B2 (en) * 2012-08-09 2017-06-06 Telefonaktiebolaget Lm Ericsson (Publ) Microwave link control
US9167536B2 (en) * 2013-04-10 2015-10-20 Qualcomm Incorporated Method and apparatus for sir estimation using time multiplexed pilots and TPC commands
CN104378787B (zh) * 2014-11-26 2017-09-29 南京航空航天大学 基于扩展Prony算法的平坦快衰落长距离信道预测方法
US10135661B2 (en) * 2016-06-22 2018-11-20 Huawei Technologies Co., Ltd. Phase noise estimation and cancellation
CN107018097B (zh) * 2017-02-15 2020-02-28 浙江科技学院 一种无线光通信基于广义似然比检测原理的序列检测方法
CN107682115B (zh) * 2017-09-02 2020-09-22 中国人民解放军91388部队 基于ClassA海洋环境噪声模型的卷积码维特比软判决译码方法
CN109787664A (zh) * 2017-11-15 2019-05-21 索尼公司 用于无线通信系统的电子设备、方法、装置和存储介质
CN109274630B (zh) * 2018-11-29 2020-04-07 西安电子科技大学 抗频率选择性衰落的多载波信号矢量分集合并方法

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Also Published As

Publication number Publication date
DE60114670T2 (de) 2006-08-03
EP1383263B1 (en) 2005-11-02
CN1302125A (zh) 2001-07-04
US20060062284A1 (en) 2006-03-23
CN1110163C (zh) 2003-05-28
ES2252249T3 (es) 2006-05-16
DE60114670D1 (de) 2005-12-08
ATE308835T1 (de) 2005-11-15
EP1383263A1 (en) 2004-01-21
US7277472B2 (en) 2007-10-02
WO2002091643A1 (en) 2002-11-14
EP1383263A4 (en) 2005-01-12

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B15K Others concerning applications: alteration of classification

Free format text: A CLASSIFICACAO ANTERIOR ERA: H04J 13/00

Ipc: H04B 1/707 (2011.01), H04L 25/02 (2006.01), H04L 2

B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE ACORDO COM O ART .8O COMBINADO COM ART. 13 DA LPI

B12B Appeal against refusal [chapter 12.2 patent gazette]