MX9703356A - Unidad de desmodulacion de espectro extendido. - Google Patents

Unidad de desmodulacion de espectro extendido.

Info

Publication number
MX9703356A
MX9703356A MX9703356A MX9703356A MX9703356A MX 9703356 A MX9703356 A MX 9703356A MX 9703356 A MX9703356 A MX 9703356A MX 9703356 A MX9703356 A MX 9703356A MX 9703356 A MX9703356 A MX 9703356A
Authority
MX
Mexico
Prior art keywords
correlation level
path component
accordance
change
circuit
Prior art date
Application number
MX9703356A
Other languages
English (en)
Other versions
MXPA97003356A (es
Inventor
Takayuki Nakano
Original Assignee
Matsushita Electric Ind 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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of MX9703356A publication Critical patent/MX9703356A/es
Publication of MXPA97003356A publication Critical patent/MXPA97003356A/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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising
    • 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
    • H04B1/709—Correlator structure
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Un sistema de desmodulacion mejorado asigna un tiempo de recepcion para la desmodulacion de un componente de multiples trayectorias de una señal de transmision de acuerdo con una velocidad de cambio estimada de un nivel de correlacion de un componente de multiples trayectorias. Se proporciona un circuito de promediacion para determinar un nivel de correlacion promedio de un componente de multiples trayectorias de acuerdo con un intervalo de promediacion, en donde el intervalo de promediacion se determina de acuerdo con una velocidad de cambio estimada en el nivel de correlacion de un componente de multiples trayectorias. Se proporciona una unidad de representacion visual de velocidad de movimiento para determinar y desplegar una velocidad de movimiento relativa entre el transmisor y el receptor de acuerdo con una velocidad de cambio estimada del nivel de correlacion de un componente de multiples trayectorias. Se proporciona un circuito de prediccion del nivel de correlacion para predecir el nivel de correlacion de un componente de multiples trayectorias de acuerdo con mediciones pasadas del nivel de correlacion. Un circuito de asignacion de fase determina una asignacion del tiempo de recepcion de acuerdo con el nivel de correlacion estimado para desmodular un componente de multiples trayectorias de una señal de transmision por un circuito de desmodulacion.
MXPA/A/1997/003356A 1996-05-16 1997-05-08 Unidad de desmodulacion de espectro extendido MXPA97003356A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08648811 1996-05-16
US08/648,811 US5903596A (en) 1996-05-16 1996-05-16 Spread spectrum demodulation unit

Publications (2)

Publication Number Publication Date
MX9703356A true MX9703356A (es) 1997-11-29
MXPA97003356A MXPA97003356A (es) 1998-07-03

Family

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Also Published As

Publication number Publication date
EP0808031A2 (en) 1997-11-19
DE69736033D1 (de) 2006-07-20
CN1166733A (zh) 1997-12-03
US5903596A (en) 1999-05-11
CA2205352C (en) 2002-02-12
CN1144387C (zh) 2004-03-31
KR970078067A (ko) 1997-12-12
KR100415034B1 (ko) 2004-02-14
JPH1065578A (ja) 1998-03-06
EP0808031B1 (en) 2006-06-07
DE69736033T2 (de) 2006-12-14
JP3310194B2 (ja) 2002-07-29
CA2205352A1 (en) 1997-11-16
EP0808031A3 (en) 2001-01-17
IN191214B (es) 2003-10-11

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