AR047592A1 - Un metodo para recuperar primer y segundo flujo de datos transmitidos en forma simultanea mediante un canal inalambrico en un sistema de comunicacion inalambrico y un aparato operable para dicho metodo. - Google Patents

Un metodo para recuperar primer y segundo flujo de datos transmitidos en forma simultanea mediante un canal inalambrico en un sistema de comunicacion inalambrico y un aparato operable para dicho metodo.

Info

Publication number
AR047592A1
AR047592A1 ARP050100428A ARP050100428A AR047592A1 AR 047592 A1 AR047592 A1 AR 047592A1 AR P050100428 A ARP050100428 A AR P050100428A AR P050100428 A ARP050100428 A AR P050100428A AR 047592 A1 AR047592 A1 AR 047592A1
Authority
AR
Argentina
Prior art keywords
symbols
channel estimate
flow
channel
transmitted simultaneously
Prior art date
Application number
ARP050100428A
Other languages
English (en)
Inventor
Ashok Mantravadi
Aamod Khandekar
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 AR047592A1 publication Critical patent/AR047592A1/es

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
    • H04L25/022—Channel estimation of frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/0026—Interference mitigation or co-ordination of multi-user interference
    • H04J11/0036—Interference mitigation or co-ordination of multi-user interference at the receiver
    • H04J11/004—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation
    • 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
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/3488—Multiresolution systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint

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)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Noise Elimination (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Para recuperar multiples flujos de datos transmitidos en forma simultánea, una primera estimacion de canal de deriva para el canal inalámbrico en base a símbolos piloto recibidos. La deteccion se realiza sobre símbolos de datos recibidos utilizando la primer estimacion de canal para obtener símbolos detectados para un primer flujo de datos. Estos símbolos detectados se decodifican para obtener un primer flujo de datos decodificado, el cual es recodificado para obtener símbolos remodulados. Una segunda estimacion de canal se deriva en base a los símbolos remodulados. El primer y segundo estimados de canal se combinan para obtener una tercera estimacion de canal que presenta una mayor calidad. La interferencia debida al primer flujo de datos se estima utilizando la tercer estimacion de canal y se cancela de los símbolos de datos recibidos. La deteccion se realiza sobre símbolos en los cuales se cancelo la interferencia utilizando la tercer estimacion de canal para obtener símbolos detectados para un segundo flujo de datos. Estos símbolos detectados se decodifican mas aun para obtener un segundo flujo de datos decodificado.
ARP050100428A 2004-02-05 2005-02-04 Un metodo para recuperar primer y segundo flujo de datos transmitidos en forma simultanea mediante un canal inalambrico en un sistema de comunicacion inalambrico y un aparato operable para dicho metodo. AR047592A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/773,646 US7701917B2 (en) 2004-02-05 2004-02-05 Channel estimation for a wireless communication system with multiple parallel data streams

Publications (1)

Publication Number Publication Date
AR047592A1 true AR047592A1 (es) 2006-01-25

Family

ID=34826811

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP050100428A AR047592A1 (es) 2004-02-05 2005-02-04 Un metodo para recuperar primer y segundo flujo de datos transmitidos en forma simultanea mediante un canal inalambrico en un sistema de comunicacion inalambrico y un aparato operable para dicho metodo.

Country Status (13)

Country Link
US (2) US7701917B2 (es)
EP (1) EP1719312A2 (es)
JP (1) JP4602995B2 (es)
KR (1) KR100893517B1 (es)
CN (1) CN1939018B (es)
AR (1) AR047592A1 (es)
AU (1) AU2005213126C1 (es)
BR (1) BRPI0507457A (es)
CA (1) CA2555397A1 (es)
IL (1) IL177294A0 (es)
RU (1) RU2332801C2 (es)
TW (1) TW200601755A (es)
WO (1) WO2005079031A2 (es)

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CN1939018B (zh) 2011-01-05
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RU2332801C2 (ru) 2008-08-27
US7701917B2 (en) 2010-04-20
BRPI0507457A (pt) 2007-07-03
US20100166118A1 (en) 2010-07-01
EP1719312A2 (en) 2006-11-08
IL177294A0 (en) 2006-12-10
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