BR0314342A - Estimativa de canal para sistemas de comunicação - Google Patents
Estimativa de canal para sistemas de comunicaçãoInfo
- Publication number
- BR0314342A BR0314342A BR0314342-2A BR0314342A BR0314342A BR 0314342 A BR0314342 A BR 0314342A BR 0314342 A BR0314342 A BR 0314342A BR 0314342 A BR0314342 A BR 0314342A
- Authority
- BR
- Brazil
- Prior art keywords
- communication systems
- channel estimation
- channel
- decoded
- data packet
- 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
- 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
- H04L25/0236—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols using estimation of the other symbols
-
- 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
- H04B1/76—Pilot transmitters or receivers for control of transmission or for equalising
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/10—Polarisation diversity; Directional diversity
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Error Detection And Correction (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
"ESTIMATIVA DE CANAL PARA SISTEMAS DE COMUNICAçãO". Uma estimativa de canal aperfeiçoada é descrita. Em uma modalidade, a estimativa de canal inicial é realizada utilizando-se a seq³ência de dados de treinamento conhecida. O pacote de dados recebido é demodulado com base nas estimativas de canal inicial, deintercalado e decodificado. Os dados decodificados são então novamente codificados, intercalados e modulados para gerar símbolos de treinamento adicionais para atualização das estimativas de canal por todo o pacote de dados recebido.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US40896802P | 2002-09-04 | 2002-09-04 | |
US10/651,625 US20040165683A1 (en) | 2002-09-04 | 2003-08-28 | Channel estimation for communication systems |
PCT/US2003/027803 WO2004030233A1 (en) | 2002-09-04 | 2003-09-04 | Channel estimation for communication systems |
Publications (1)
Publication Number | Publication Date |
---|---|
BR0314342A true BR0314342A (pt) | 2005-08-09 |
Family
ID=32045217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR0314342-2A BR0314342A (pt) | 2002-09-04 | 2003-09-04 | Estimativa de canal para sistemas de comunicação |
Country Status (9)
Country | Link |
---|---|
US (1) | US20040165683A1 (pt) |
EP (1) | EP1535404A4 (pt) |
JP (1) | JP2005538659A (pt) |
KR (1) | KR20050057230A (pt) |
AU (2) | AU2003270328A1 (pt) |
BR (1) | BR0314342A (pt) |
CA (1) | CA2497739A1 (pt) |
RU (1) | RU2005109407A (pt) |
WO (1) | WO2004030233A1 (pt) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2393618B (en) * | 2002-09-26 | 2004-12-15 | Toshiba Res Europ Ltd | Transmission signals methods and apparatus |
KR100582906B1 (ko) * | 2003-12-27 | 2006-05-23 | 한국전자통신연구원 | 무선 랜 시스템을 위한 프리앰블 구성 방법 및 프레임동기 검출 방법 |
US7693032B2 (en) | 2004-02-13 | 2010-04-06 | Neocific, Inc. | Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback |
US20050220131A1 (en) * | 2004-03-31 | 2005-10-06 | Boris Ginzburg | Method and apparatus to multicast transmission |
US8484272B2 (en) * | 2004-08-20 | 2013-07-09 | Qualcomm Incorporated | Unified pulse shaping for multi-carrier and single-carrier waveforms |
US20070053454A1 (en) * | 2004-08-31 | 2007-03-08 | Manish Bhardwaj | Compensation method and apparatus in orthogonal frequency division multiplexing (OFDM) systems |
GB2424805B (en) * | 2005-03-30 | 2007-02-28 | Toshiba Res Europ Ltd | Efficient channel tracking in packet based OFDM systems |
US7403470B2 (en) * | 2005-06-13 | 2008-07-22 | Qualcomm Incorporated | Communications system, methods and apparatus |
US20080219360A1 (en) * | 2007-03-07 | 2008-09-11 | Motorola, Inc. | System and method for performing channel estimation using interpolation |
FR2915840B1 (fr) * | 2007-05-04 | 2009-07-24 | Eads Secure Networks Soc Par A | Decodage de symboles d'un signal repartis suivant des dimensions frequentielle et temporelle |
JP5249541B2 (ja) * | 2007-08-22 | 2013-07-31 | 株式会社モバイルテクノ | 伝搬路推定装置及び受信装置 |
KR101108707B1 (ko) * | 2008-11-26 | 2012-01-30 | 한국전자통신연구원 | 위치추적 시스템 및 위치추적 시스템용 통신신호 수신장치 및 위치계산방법 |
KR101278031B1 (ko) | 2008-12-22 | 2013-06-21 | 한국전자통신연구원 | 병렬 자동 주파수 오프셋 추정장치 및 방법 |
EP2341678A1 (en) * | 2010-01-05 | 2011-07-06 | Panasonic Corporation | Signaling of resource assignments in cross-carrier scheduling scenarios |
US8774222B2 (en) * | 2011-02-10 | 2014-07-08 | Electronics And Telecommunications Research Institute | Method for generating and transmitting frame in a wireless local area network and apparatus for supporting the same |
GB2512394A (en) * | 2013-03-28 | 2014-10-01 | Sony Corp | Transmitter and method of transmitting |
DE102018206132B4 (de) * | 2018-04-20 | 2019-11-21 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Decodergestützte iterative Kanalschätzung |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5329547A (en) * | 1993-03-11 | 1994-07-12 | Motorola, Inc. | Method and apparatus for coherent communication in a spread-spectrum communication system |
CN1082757C (zh) * | 1994-06-22 | 2002-04-10 | Ntt移动通信网株式会社 | 用于数字通信接收机的相干检测器和相干检测方法 |
US5687198A (en) * | 1996-01-04 | 1997-11-11 | Motorola, Inc. | Channel estimation in a communication system |
US5822380A (en) * | 1996-08-12 | 1998-10-13 | Ericsson Inc. | Apparatus and method for joint channel estimation |
US6125136A (en) * | 1997-12-31 | 2000-09-26 | Sony Corporation | Method and apparatus for demodulating trellis coded direct sequence spread spectrum communication signals |
US6487255B1 (en) * | 1998-08-31 | 2002-11-26 | Ericsson Inc. | Information generation for coherent demodulation of differentially encoded signals |
EP0994570A1 (en) * | 1998-10-12 | 2000-04-19 | Sony International (Europe) GmbH | Spread spectrum channel estimator with inter-path interference cancellation |
US6587517B1 (en) * | 1998-12-23 | 2003-07-01 | Nortel Networks Limited | Multi-stage receiver |
US6452917B1 (en) * | 1999-04-08 | 2002-09-17 | Qualcomm Incorporated | Channel estimation in a CDMA wireless communication system |
US6614857B1 (en) * | 1999-04-23 | 2003-09-02 | Lucent Technologies Inc. | Iterative channel estimation and compensation based thereon |
US6585717B1 (en) * | 1999-06-15 | 2003-07-01 | Cryocath Technologies Inc. | Deflection structure |
JP2001069117A (ja) * | 1999-08-31 | 2001-03-16 | Matsushita Electric Ind Co Ltd | Ofdm通信装置及び伝搬路推定方法 |
JP3492565B2 (ja) * | 1999-09-13 | 2004-02-03 | 松下電器産業株式会社 | Ofdm通信装置および検波方法 |
FI113721B (fi) * | 1999-12-15 | 2004-05-31 | Nokia Corp | Menetelmä ja vastaanotin kanavaestimaatin iteratiiviseksi parantamiseksi |
US6625236B1 (en) * | 2000-02-08 | 2003-09-23 | Ericsson Inc. | Methods and systems for decoding symbols by combining matched-filtered samples with hard symbol decisions |
US7099267B2 (en) * | 2001-08-23 | 2006-08-29 | Dsp Group Inc. | Enhanced frequency domain equalization in OFDM communication |
-
2003
- 2003-08-28 US US10/651,625 patent/US20040165683A1/en not_active Abandoned
- 2003-09-04 EP EP03752014A patent/EP1535404A4/en not_active Withdrawn
- 2003-09-04 AU AU2003270328A patent/AU2003270328A1/en not_active Abandoned
- 2003-09-04 WO PCT/US2003/027803 patent/WO2004030233A1/en active Application Filing
- 2003-09-04 KR KR1020057003864A patent/KR20050057230A/ko not_active Application Discontinuation
- 2003-09-04 BR BR0314342-2A patent/BR0314342A/pt not_active IP Right Cessation
- 2003-09-04 CA CA002497739A patent/CA2497739A1/en not_active Abandoned
- 2003-09-04 JP JP2004540049A patent/JP2005538659A/ja active Pending
- 2003-09-04 RU RU2005109407/09A patent/RU2005109407A/ru not_active Application Discontinuation
-
2009
- 2009-06-26 AU AU2009202588A patent/AU2009202588A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20040165683A1 (en) | 2004-08-26 |
RU2005109407A (ru) | 2006-01-27 |
AU2003270328A1 (en) | 2004-04-19 |
EP1535404A4 (en) | 2008-06-25 |
WO2004030233A1 (en) | 2004-04-08 |
KR20050057230A (ko) | 2005-06-16 |
AU2009202588A1 (en) | 2009-07-16 |
JP2005538659A (ja) | 2005-12-15 |
EP1535404A1 (en) | 2005-06-01 |
CA2497739A1 (en) | 2004-04-08 |
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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 8A 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 2160 DE 29/05/2012. |