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MX9800853A - Des-extendedor adaptable. - Google Patents

Des-extendedor adaptable.

Info

Publication number
MX9800853A
MX9800853A MX9800853A MX9800853A MX9800853A MX 9800853 A MX9800853 A MX 9800853A MX 9800853 A MX9800853 A MX 9800853A MX 9800853 A MX9800853 A MX 9800853A MX 9800853 A MX9800853 A MX 9800853A
Authority
MX
Mexico
Prior art keywords
symbol
soft
error
spread spectrum
spectrum signal
Prior art date
Application number
MX9800853A
Other languages
English (en)
Other versions
MXPA98000853A (es
Inventor
Arthur Ross
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 MXPA98000853A publication Critical patent/MXPA98000853A/es
Publication of MX9800853A publication Critical patent/MX9800853A/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
    • 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
    • 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
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03617—Time recursive algorithms

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)
  • Noise Elimination (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Radio Transmission System (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un método y un aparato para des-extender de manera adaptable una señal de espectro extendido de secuencia directa. La señal de espectro extendido de secuencia directa se proporciona hacia el filtro transversal (101). La salida del filtro (101) se des-extiende mediante un des-extendedor (120) para proporcionar un símbolo suave determinado por el estimador de símbolo (122). El símbolo suave se proporciona hacia el circuito de decision (124) que genera una version de error corregido de los datos de símbolo suave, referidos como un símbolo duro. El valor de símbolo duro se substrae del símbolo suave mediante el substractor (126) para generar un símbolo de error. El símbolo de error se utiliza entonces para completar los valores de derivacion del filtro transversal por medio de un algoritmo LMS empleado por el adaptador de derivacion (103).
MX9800853A 1995-07-31 1996-07-31 Des-extendedor adaptable. MX9800853A (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/509,722 US5692006A (en) 1995-07-31 1995-07-31 Adaptive despreader
US08509722 1995-07-31
PCT/US1996/012531 WO1997005709A1 (en) 1995-07-31 1996-07-31 Adaptive despreader

Publications (2)

Publication Number Publication Date
MXPA98000853A MXPA98000853A (es) 1998-04-01
MX9800853A true MX9800853A (es) 1998-04-30

Family

ID=24027839

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9800853A MX9800853A (es) 1995-07-31 1996-07-31 Des-extendedor adaptable.

Country Status (17)

Country Link
US (1) US5692006A (es)
EP (1) EP0842568B1 (es)
JP (2) JP3241739B2 (es)
KR (1) KR19990036012A (es)
CN (1) CN1091554C (es)
AR (1) AR003021A1 (es)
AT (1) ATE279814T1 (es)
AU (1) AU6715896A (es)
BR (1) BR9609939A (es)
CA (1) CA2228131A1 (es)
DE (1) DE69633625T2 (es)
FI (1) FI980162A (es)
HK (1) HK1010952A1 (es)
MX (1) MX9800853A (es)
TW (1) TW322667B (es)
WO (1) WO1997005709A1 (es)
ZA (1) ZA966011B (es)

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Also Published As

Publication number Publication date
JP3241739B2 (ja) 2001-12-25
CA2228131A1 (en) 1997-02-13
HK1010952A1 (en) 1999-07-02
KR19990036012A (ko) 1999-05-25
CN1192830A (zh) 1998-09-09
DE69633625D1 (de) 2004-11-18
FI980162A0 (fi) 1998-01-26
EP0842568B1 (en) 2004-10-13
AR003021A1 (es) 1998-05-27
ATE279814T1 (de) 2004-10-15
AU6715896A (en) 1997-02-26
JPH11510343A (ja) 1999-09-07
TW322667B (es) 1997-12-11
WO1997005709A1 (en) 1997-02-13
DE69633625T2 (de) 2005-10-27
US5692006A (en) 1997-11-25
EP0842568A1 (en) 1998-05-20
FI980162A (fi) 1998-03-30
JP2001352277A (ja) 2001-12-21
BR9609939A (pt) 1999-06-08
CN1091554C (zh) 2002-09-25
ZA966011B (en) 1997-01-31

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