BR0008375A - Sistema e processo para recuperar um desvio de temporização de sìmbolo e erro de frequência portadora de um sinal multiplexado por divisão de frequência ortogonal - Google Patents
Sistema e processo para recuperar um desvio de temporização de sìmbolo e erro de frequência portadora de um sinal multiplexado por divisão de frequência ortogonalInfo
- Publication number
- BR0008375A BR0008375A BR0008375-5A BR0008375A BR0008375A BR 0008375 A BR0008375 A BR 0008375A BR 0008375 A BR0008375 A BR 0008375A BR 0008375 A BR0008375 A BR 0008375A
- Authority
- BR
- Brazil
- Prior art keywords
- signal
- circuit
- ofdm
- symbol
- frequency error
- Prior art date
Links
Classifications
-
- 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
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
-
- 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
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
-
- 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
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2673—Details of algorithms characterised by synchronisation parameters
- H04L27/2676—Blind, i.e. without using known symbols
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Radio Transmission System (AREA)
Abstract
"SISTEMA E PROCESSO PARA RECUPERAR UM DESVIO DE TEMPORIZAçãO DE SìMBOLO E ERRO DE FREQuêNCIA PORTADORA DE UM SINAL MULTIPLEXADO POR DIVISãO DE FREQuêNCIA ORTOGONAL". O sistema para recuperar desvio de temporização de sìmbolo e erro de freq³ência portadora de um sinal multiplexado por divisão de freq³ência ortogonal (OFDM) inclui um circuito receptor para receber um sinal modulado OFDM representando uma série de sìmbolos OFDM, e prover um sinal recebido a uma saída do mesmo. Um circuito gerador de pico é incluído para gerar um sinal tendo uma pluralidade de picos de sinal representando posições delimitadoras de símbolo para cada símbolo OFDM recebido, onde cada um dos picos de sinal é gerado responsivo a uma correspondência de amplitude e fase produzida entre as partes dianteira e traseira de cada um dos símbolos OFDM recebidos. O sistema inclui um circuito para otimizar a faculdade de detecção de pico de sinal, que inclui um circuito para aditivamente superpor e a seguir filtrar os picos de sinal, para produzir um pico de sinal otimizado dotado de uma relação de sinal para ruído aperfeiçoada. Um circuito para estabelecer uma posição temporal indicativa da posição delimitadora de símbolo a partir de pelo menos um dos picos de sinal otimizado emitido pelo módulo de otimização de sinal é também provido. Outrossim, um circuito para recuperar o erro de freq³ência portadora de sinal OFDM recebida correspondente à posição temporal é incluído.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR122014017040A BR122014017040B1 (pt) | 1999-02-18 | 2000-02-17 | sistema e processo para recuperar um desvio de temporização de símbolo e erro de frequência portadora de um sinal multiplexado por divisão de frequência ortogonal |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/252959 | 1999-02-18 | ||
US09/252,959 US6539063B1 (en) | 1999-02-18 | 1999-02-18 | System and method for recovering symbol timing offset and carrier frequency error in an OFDM digital audio broadcast system |
PCT/US2000/004062 WO2000049782A2 (en) | 1999-02-18 | 2000-02-17 | A system and method for recovering symbol timing offset and carrier frequency error |
Publications (2)
Publication Number | Publication Date |
---|---|
BR0008375A true BR0008375A (pt) | 2001-11-06 |
BRPI0008375B1 BRPI0008375B1 (pt) | 2017-11-21 |
Family
ID=22958273
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR122014017040A BR122014017040B1 (pt) | 1999-02-18 | 2000-02-17 | sistema e processo para recuperar um desvio de temporização de símbolo e erro de frequência portadora de um sinal multiplexado por divisão de frequência ortogonal |
BRPI0008375-5A BRPI0008375B1 (pt) | 1999-02-18 | 2000-02-17 | System and process for recovering a symbol timer defrost and frequency error carrier of a multiplexed sign by ortogonal frequency division |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR122014017040A BR122014017040B1 (pt) | 1999-02-18 | 2000-02-17 | sistema e processo para recuperar um desvio de temporização de símbolo e erro de frequência portadora de um sinal multiplexado por divisão de frequência ortogonal |
Country Status (11)
Country | Link |
---|---|
US (2) | US6539063B1 (pt) |
EP (1) | EP1155545A2 (pt) |
JP (1) | JP2002537729A (pt) |
KR (1) | KR100682162B1 (pt) |
CN (1) | CN1138378C (pt) |
AU (1) | AU770957B2 (pt) |
BR (2) | BR122014017040B1 (pt) |
CA (2) | CA2362029A1 (pt) |
MX (1) | MXPA01008333A (pt) |
RU (1) | RU2232479C2 (pt) |
WO (1) | WO2000049782A2 (pt) |
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-
1999
- 1999-02-18 US US09/252,959 patent/US6539063B1/en not_active Expired - Lifetime
-
2000
- 2000-02-17 CN CNB008052697A patent/CN1138378C/zh not_active Expired - Lifetime
- 2000-02-17 CA CA002362029A patent/CA2362029A1/en not_active Abandoned
- 2000-02-17 RU RU2001125494/09A patent/RU2232479C2/ru not_active IP Right Cessation
- 2000-02-17 AU AU30003/00A patent/AU770957B2/en not_active Ceased
- 2000-02-17 BR BR122014017040A patent/BR122014017040B1/pt not_active IP Right Cessation
- 2000-02-17 CA CA002663122A patent/CA2663122A1/en not_active Abandoned
- 2000-02-17 BR BRPI0008375-5A patent/BRPI0008375B1/pt not_active IP Right Cessation
- 2000-02-17 MX MXPA01008333A patent/MXPA01008333A/es active IP Right Grant
- 2000-02-17 KR KR1020017010528A patent/KR100682162B1/ko not_active IP Right Cessation
- 2000-02-17 EP EP00908707A patent/EP1155545A2/en not_active Withdrawn
- 2000-02-17 JP JP2000600408A patent/JP2002537729A/ja active Pending
- 2000-02-17 WO PCT/US2000/004062 patent/WO2000049782A2/en active IP Right Grant
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2002
- 2002-10-23 US US10/278,316 patent/US6891898B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2002537729A (ja) | 2002-11-05 |
EP1155545A2 (en) | 2001-11-21 |
CA2362029A1 (en) | 2000-08-24 |
CA2663122A1 (en) | 2000-08-24 |
CN1138378C (zh) | 2004-02-11 |
BRPI0008375B1 (pt) | 2017-11-21 |
CN1351787A (zh) | 2002-05-29 |
BR122014017040B1 (pt) | 2016-12-27 |
AU770957B2 (en) | 2004-03-11 |
KR20010108236A (ko) | 2001-12-07 |
AU3000300A (en) | 2000-09-04 |
WO2000049782A3 (en) | 2001-03-08 |
KR100682162B1 (ko) | 2007-02-12 |
US6891898B2 (en) | 2005-05-10 |
MXPA01008333A (es) | 2003-06-06 |
WO2000049782A2 (en) | 2000-08-24 |
RU2232479C2 (ru) | 2004-07-10 |
US6539063B1 (en) | 2003-03-25 |
US20030053550A1 (en) | 2003-03-20 |
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