BRPI0513697A - transmissão piloto e estimação de canal para múltiplos transmissores - Google Patents

transmissão piloto e estimação de canal para múltiplos transmissores

Info

Publication number
BRPI0513697A
BRPI0513697A BRPI0513697-0A BRPI0513697A BRPI0513697A BR PI0513697 A BRPI0513697 A BR PI0513697A BR PI0513697 A BRPI0513697 A BR PI0513697A BR PI0513697 A BRPI0513697 A BR PI0513697A
Authority
BR
Brazil
Prior art keywords
code
time
pilot
frequency
impulse response
Prior art date
Application number
BRPI0513697-0A
Other languages
English (en)
Inventor
Dhananjay Ashok Gore
Avneesh Agrawal
Tamer Kadous
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 BRPI0513697A publication Critical patent/BRPI0513697A/pt

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
    • 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
    • H04L25/0204—Channel estimation of multiple channels
    • 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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • 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
    • H04L25/0212—Channel estimation of impulse response
    • 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
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Transmitters (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

TRAMSMISSãO PILOTO E ESTIMAçãO DE CANAL PAPA MúLTIPLOS TRANSMISSõRES Cada transmissor recebe um código piloto de tempo apenas, um código piloto de freqüência apenas, ou um código piloto de tempo e freqüência para uso para a transmissão piloto. Os códigos piloto podem ser pseudo-aleatórios, ortogonais e/ou códigos de mudança cíclica. Para obter uma estimação de canal para um transmissor utilizando um código piloto de tempo e freqüência composto de um código de tempo apenas e um código de freqüência apenas, um receptor multiplica um conjunto de símbolos recebidos para cada período de símbolo por um conjunto de valores de código para o código de freqüência apenas para obter um conjunto de símbolos detectados e realiza uma IDFT no conjunto de símbolos detectados para obter uma estimação de resposta a impulso inicial. O receptor realiza a combinação de código nas múltiplas estimações de resposta a impulso inicial derivadas para múltiplos períodos de símbolo com o código de tempo apenas para obtenção de uma estimação de resposta a impulso final para o transmissor desejado. O receptor retém as primeiras L derivações de canal e zera as derivações de canal restantes, onde L é o comprimento de canal esperado.
BRPI0513697-0A 2004-07-22 2005-07-11 transmissão piloto e estimação de canal para múltiplos transmissores BRPI0513697A (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US59086404P 2004-07-22 2004-07-22
US11/022,146 US7418046B2 (en) 2004-07-22 2004-12-22 Pilot transmission and channel estimation for multiple transmitters
PCT/US2005/024612 WO2006019708A1 (en) 2004-07-22 2005-07-11 Pilot transmission and channel estimation for multiple transmitters

Publications (1)

Publication Number Publication Date
BRPI0513697A true BRPI0513697A (pt) 2008-05-13

Family

ID=35094088

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0513697-0A BRPI0513697A (pt) 2004-07-22 2005-07-11 transmissão piloto e estimação de canal para múltiplos transmissores

Country Status (13)

Country Link
US (2) US7418046B2 (pt)
EP (1) EP1774735A1 (pt)
JP (1) JP2008507901A (pt)
KR (1) KR100863469B1 (pt)
AR (1) AR050006A1 (pt)
AU (2) AU2005275339A1 (pt)
BR (1) BRPI0513697A (pt)
CA (1) CA2574795A1 (pt)
IL (1) IL180863A0 (pt)
MX (1) MX2007000859A (pt)
RU (1) RU2350030C2 (pt)
TW (1) TW200625883A (pt)
WO (1) WO2006019708A1 (pt)

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Also Published As

Publication number Publication date
CA2574795A1 (en) 2006-02-23
US7418046B2 (en) 2008-08-26
US20080112495A1 (en) 2008-05-15
TW200625883A (en) 2006-07-16
MX2007000859A (es) 2007-05-23
KR20070044033A (ko) 2007-04-26
AU2005275339A1 (en) 2006-02-23
RU2007106712A (ru) 2008-08-27
US20060018411A1 (en) 2006-01-26
AR050006A1 (es) 2006-09-20
KR100863469B1 (ko) 2008-10-16
EP1774735A1 (en) 2007-04-18
RU2350030C2 (ru) 2009-03-20
IL180863A0 (en) 2007-07-04
WO2006019708A1 (en) 2006-02-23
JP2008507901A (ja) 2008-03-13
AU2010200658A1 (en) 2010-03-11

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 7A ANUIDADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2158 DE 15/05/2012.