AR003021A1 - Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro. - Google Patents

Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro.

Info

Publication number
AR003021A1
AR003021A1 ARP960103720A AR10372096A AR003021A1 AR 003021 A1 AR003021 A1 AR 003021A1 AR P960103720 A ARP960103720 A AR P960103720A AR 10372096 A AR10372096 A AR 10372096A AR 003021 A1 AR003021 A1 AR 003021A1
Authority
AR
Argentina
Prior art keywords
symbol
direct sequence
spectrum signal
spectrum
decreasing
Prior art date
Application number
ARP960103720A
Other languages
English (en)
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 AR003021A1 publication Critical patent/AR003021A1/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)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

El presente invento comprende un método y un aparato para des-extender en forma adaptable una senal de espectro extendido de secuencia directa. La senalde espectro extendido de secuencia directa se proporciona a un filtro transversal 101.La salida del filtro 101 es des-extendida por un des-extensor120 para obtener un símbolo blando determinado por un estimador de símbolos 122. El símbolo blando se proporciona a un circuito de decisión 124 que generauna versión con corrección deerrores de los datos del símbolo blando, denominada símbolo duro. El valor del símbolo duro se resta del símbolo blandopor sustractor 126 para generar un símbolo de error. Este símbolo de error se usa posteriormente para computar valores de derivación del filtro transversalpor medio de un algoritmo de medias cuadráticas mínimas (MCM) empleado por el adaptador de derivación 103.
ARP960103720A 1995-07-31 1996-07-24 Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro. AR003021A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/509,722 US5692006A (en) 1995-07-31 1995-07-31 Adaptive despreader

Publications (1)

Publication Number Publication Date
AR003021A1 true AR003021A1 (es) 1998-05-27

Family

ID=24027839

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP960103720A AR003021A1 (es) 1995-07-31 1996-07-24 Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro.

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
AU6715896A (en) 1997-02-26
BR9609939A (pt) 1999-06-08
WO1997005709A1 (en) 1997-02-13
JP2001352277A (ja) 2001-12-21
FI980162A (fi) 1998-03-30
CA2228131A1 (en) 1997-02-13
DE69633625T2 (de) 2005-10-27
MX9800853A (es) 1998-04-30
HK1010952A1 (en) 1999-07-02
CN1192830A (zh) 1998-09-09
TW322667B (es) 1997-12-11
EP0842568A1 (en) 1998-05-20
EP0842568B1 (en) 2004-10-13
JPH11510343A (ja) 1999-09-07
ATE279814T1 (de) 2004-10-15
US5692006A (en) 1997-11-25
CN1091554C (zh) 2002-09-25
JP3241739B2 (ja) 2001-12-25
ZA966011B (en) 1997-01-31
FI980162A0 (fi) 1998-01-26
DE69633625D1 (de) 2004-11-18
KR19990036012A (ko) 1999-05-25

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