BR0113095A - Método e equipamento para a equalização adaptativa e linear para a modulação de cobertura walsh - Google Patents

Método e equipamento para a equalização adaptativa e linear para a modulação de cobertura walsh

Info

Publication number
BR0113095A
BR0113095A BR0113095-1A BR0113095A BR0113095A BR 0113095 A BR0113095 A BR 0113095A BR 0113095 A BR0113095 A BR 0113095A BR 0113095 A BR0113095 A BR 0113095A
Authority
BR
Brazil
Prior art keywords
chip
walsh
estimate
smooth
generate
Prior art date
Application number
BR0113095-1A
Other languages
English (en)
Inventor
John E Smee
Ahmad Jalali
Fuyun Ling
Mark Wallace
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 BR0113095A publication Critical patent/BR0113095A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • 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
    • 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
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
    • 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
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • 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
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03439—Fixed structures
    • H04L2025/03445—Time domain
    • H04L2025/03471—Tapped delay lines
    • H04L2025/03477—Tapped delay lines not time-recursive

Abstract

"MéTODO E EQUIPAMENTO PARA A EQUALIZAçãO ADAPTATIVA E LINEAR PARA A MODULAçãO DE COBERTURA WALSH". Um filtro receptor recebe sinais de um canal de comunicação. Os sinais recebidos correspondem às seq³ências de chip com cobertura Walsh originais transmitidas por um filtro transmissor através do canal de comunicação para o filtro receptor. Os sinais recebidos são processados por um equalizador para gerar uma estimativa suave das seq³ências de chip correspondentes às seq³ências de chip com cobertura Walsh originais. Um descobridor (decover) Walsh de N chip é então utilizado para gerar uma estimativa suave dos símbolos código correspondentes à estimativa suave das seq³ências de chip. Um número de fatiadores de símbolo é utilizado então, em paralelo, para produzir uma estimativa bruta dos símbolos código correspondentes à estimativa suave de símbolos código gerados pelo descobridor Walsh de N chip. Depois disso, um cobridor (cover) Walsh de N chip é utilizado como parte de um esquema para gerar uma estimativa bruta das seq³ências de chip correspondentes ã estimativa bruta dos símbolos código gerados pelos fatiadores de símbolo. A estimativa bruta das seq³ências de chips geradas com o auxílio do cobridor Walsh de N chip, e a estimativa suave das seq³ências de chip geradas pelo equalizador, são utilizadas para gerar um sinal de erro de modo de rastreamento para adaptar a resposta do equalizador aos sinais recebidos.
BR0113095-1A 2000-08-10 2001-08-01 Método e equipamento para a equalização adaptativa e linear para a modulação de cobertura walsh BR0113095A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/636,008 US6522683B1 (en) 2000-08-10 2000-08-10 Method and apparatus for adaptive linear equalization for walsh covered modulation
PCT/US2001/024138 WO2002015502A2 (en) 2000-08-10 2001-08-01 Adaptive linear equalisation for walsh-modulated

Publications (1)

Publication Number Publication Date
BR0113095A true BR0113095A (pt) 2003-09-16

Family

ID=24550024

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0113095-1A BR0113095A (pt) 2000-08-10 2001-08-01 Método e equipamento para a equalização adaptativa e linear para a modulação de cobertura walsh

Country Status (10)

Country Link
US (2) US6522683B1 (pt)
EP (1) EP1308008A2 (pt)
JP (1) JP2004507166A (pt)
KR (1) KR20030027019A (pt)
CN (1) CN1214584C (pt)
AU (1) AU2001277239A1 (pt)
BR (1) BR0113095A (pt)
HK (1) HK1060232A1 (pt)
TW (1) TW561746B (pt)
WO (1) WO2002015502A2 (pt)

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Also Published As

Publication number Publication date
HK1060232A1 (en) 2004-07-30
US6522683B1 (en) 2003-02-18
WO2002015502A2 (en) 2002-02-21
US7035316B2 (en) 2006-04-25
WO2002015502A3 (en) 2002-08-08
KR20030027019A (ko) 2003-04-03
JP2004507166A (ja) 2004-03-04
AU2001277239A1 (en) 2002-02-25
US20030123525A1 (en) 2003-07-03
TW561746B (en) 2003-11-11
CN1214584C (zh) 2005-08-10
EP1308008A2 (en) 2003-05-07
CN1461548A (zh) 2003-12-10

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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]