BRPI0513696A - filtragem no domìnio da freqüência para melhorar estimação de canal em sistemas multiportadoras - Google Patents
filtragem no domìnio da freqüência para melhorar estimação de canal em sistemas multiportadorasInfo
- Publication number
- BRPI0513696A BRPI0513696A BRPI0513696-2A BRPI0513696A BRPI0513696A BR PI0513696 A BRPI0513696 A BR PI0513696A BR PI0513696 A BRPI0513696 A BR PI0513696A BR PI0513696 A BRPI0513696 A BR PI0513696A
- Authority
- BR
- Brazil
- Prior art keywords
- channel estimation
- carrier
- carriers
- function
- frequency domain
- 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
-
- 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
- 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
-
- 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
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
FILTRAGEM NO DOMìNIO DA FREQüêNCIA PARA MELHORAR ESTIMAçãO DE CANAL EM SISTEMAS MULTIPORTADORAS Um sistema de estimação de canal compreende um componente de filtragem que gradua seletivamente uma pluralidade de portadoras como uma função da localização da pluralidade de portadoras dentro de uma banda de freqüência, em que a pluralidade de portadoras compreende pelo menos uma portadora de dados e pelo menos uma portadora de pilotos. Um componente em seguida extrapola uma observação da pelo menos uma portadora de pilotos, em que um canal é estimado como uma função da observação extrapolada. A graduação das portadoras facilita a redução do efeito de formação de ruído associado à estimação de canal. O componente de filtragem pode ser utilizado em um transmissor e/ou em um receptor e pode ser ativado e/ou desativado como uma função do tipo de pacote de dados detectado.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US58981704P | 2004-07-20 | 2004-07-20 | |
US11/022,360 US7616711B2 (en) | 2004-07-20 | 2004-12-22 | Frequency domain filtering to improve channel estimation in multicarrier systems |
PCT/US2005/024613 WO2006019709A1 (en) | 2004-07-20 | 2005-07-11 | Frequency domain filtering to improve channel estimation in multicarrier systems |
Publications (1)
Publication Number | Publication Date |
---|---|
BRPI0513696A true BRPI0513696A (pt) | 2008-05-13 |
Family
ID=35058177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0513696-2A BRPI0513696A (pt) | 2004-07-20 | 2005-07-11 | filtragem no domìnio da freqüência para melhorar estimação de canal em sistemas multiportadoras |
Country Status (13)
Country | Link |
---|---|
US (1) | US7616711B2 (pt) |
EP (1) | EP1774740A1 (pt) |
JP (1) | JP2008507902A (pt) |
KR (3) | KR100940057B1 (pt) |
AU (1) | AU2005275340A1 (pt) |
BR (1) | BRPI0513696A (pt) |
CA (1) | CA2574796A1 (pt) |
IL (1) | IL180826A0 (pt) |
MX (1) | MX2007000864A (pt) |
NO (1) | NO20070901L (pt) |
RU (1) | RU2373659C2 (pt) |
TW (1) | TW200629825A (pt) |
WO (1) | WO2006019709A1 (pt) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7616711B2 (en) * | 2004-07-20 | 2009-11-10 | Qualcomm Incorporated | Frequency domain filtering to improve channel estimation in multicarrier systems |
US8432803B2 (en) * | 2004-07-21 | 2013-04-30 | Qualcomm Incorporated | Method of providing a gap indication during a sticky assignment |
US8477710B2 (en) * | 2004-07-21 | 2013-07-02 | Qualcomm Incorporated | Method of providing a gap indication during a sticky assignment |
US8891349B2 (en) | 2004-07-23 | 2014-11-18 | Qualcomm Incorporated | Method of optimizing portions of a frame |
JP4264550B2 (ja) * | 2005-11-15 | 2009-05-20 | ソニー株式会社 | 受信装置並びにチャネル推定装置 |
JP4802763B2 (ja) * | 2006-02-28 | 2011-10-26 | カシオ計算機株式会社 | Ofdm信号受信装置、ofdm信号受信方法及び地上波デジタル放送受信装置 |
WO2007103183A2 (en) * | 2006-03-01 | 2007-09-13 | Interdigital Technology Corporation | Method and apparatus for channel estimation in an orthogonal frequency division multiplexing system |
JP4946159B2 (ja) | 2006-05-09 | 2012-06-06 | 富士通株式会社 | 無線送信方法及び無線受信方法並びに無線送信装置及び無線受信装置 |
EP1881662A1 (de) * | 2006-07-18 | 2008-01-23 | Siemens Aktiengesellschaft | Filtereinstellung abhängig von Nachbarbandbelegung |
US7889799B2 (en) * | 2006-08-02 | 2011-02-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for OFDM channel estimation |
EP2070372A2 (en) * | 2006-08-21 | 2009-06-17 | Interdigital Technology Corporation | Resource allocation, scheduling, and signaling for grouping real time services |
KR100874919B1 (ko) * | 2007-03-12 | 2008-12-19 | 삼성전자주식회사 | 샘플링 오프셋 추정 장치 및 샘플링 오프셋 추정 방법 |
US7830984B2 (en) * | 2007-03-30 | 2010-11-09 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | OFDM/OFDMA channel estimation |
US7881392B2 (en) * | 2007-03-30 | 2011-02-01 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | OFDM/OFDMA timing synchronization using non-consecutive pilot subcarrier assignment |
CN101542999B (zh) * | 2007-04-27 | 2012-11-07 | 松下电器产业株式会社 | 信号判定装置及信号判定方法 |
EP2187552A4 (en) * | 2007-08-28 | 2012-10-03 | Sharp Kk | COMMUNICATION APPARATUS |
US7813437B2 (en) * | 2007-09-13 | 2010-10-12 | Beceem Communications Inc. | Estimating frequency offset at a subscriber station receiver |
KR20090116602A (ko) * | 2008-05-06 | 2009-11-11 | 한국전자통신연구원 | 레인징 및 망 진입의 동시 수행 방법 |
WO2010047852A2 (en) * | 2008-06-03 | 2010-04-29 | Thomson Licensing Llc | Method and apparatus for determining channels in a signal |
US8412203B2 (en) * | 2008-10-31 | 2013-04-02 | Avaya Inc. | Next generation cell phone |
US8676965B2 (en) * | 2009-07-30 | 2014-03-18 | Hewlett-Packard Development Company, L.P. | Tracking high-level network transactions |
US10461963B2 (en) * | 2017-06-01 | 2019-10-29 | Silicon Laboratories Inc. | Two-dimensional filtering of pilots and carriers for OFDM channel estimation |
Family Cites Families (32)
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US4320399A (en) * | 1980-10-09 | 1982-03-16 | Westinghouse Electric Corp. | Microwave pulse spectrum control |
US5479447A (en) * | 1993-05-03 | 1995-12-26 | The Board Of Trustees Of The Leland Stanford, Junior University | Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines |
US5802105A (en) | 1994-11-30 | 1998-09-01 | Qualcomm Incorporated | Method and apparatus for testing a digital communication channel |
US6141317A (en) * | 1996-08-22 | 2000-10-31 | Tellabs Operations, Inc. | Apparatus and method for bandwidth management in a multi-point OFDM/DMT digital communications system |
US6618352B1 (en) * | 1998-05-26 | 2003-09-09 | Matsushita Electric Industrial Co., Ltd. | Modulator, demodulator, and transmission system for use in OFDM transmission |
US6154443A (en) * | 1998-08-11 | 2000-11-28 | Industrial Technology Research Institute | FFT-based CDMA RAKE receiver system and method |
JP2000115116A (ja) * | 1998-10-07 | 2000-04-21 | Nippon Columbia Co Ltd | 直交周波数分割多重信号発生装置、直交周波数分割多重信号発生方法及び通信装置 |
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JP2001308760A (ja) * | 2000-04-27 | 2001-11-02 | Nec Eng Ltd | 受信装置 |
EP1162803A1 (en) * | 2000-06-05 | 2001-12-12 | Telefonaktiebolaget L M Ericsson (Publ) | Frequency tracking device and method for a receiver of a multi-carrier communication system |
KR100377969B1 (ko) * | 2000-07-10 | 2003-03-29 | 이용환 | 적응 채널 추정 장치를 이용한 직접시퀀스 확산대역시스템 수신 장치 |
US6967997B2 (en) * | 2000-08-02 | 2005-11-22 | Nortel Networks Limited | Multi-carrier connection initialization and symbol transmission |
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US7145940B2 (en) * | 2003-12-05 | 2006-12-05 | Qualcomm Incorporated | Pilot transmission schemes for a multi-antenna system |
US7411930B2 (en) * | 2003-12-17 | 2008-08-12 | Qualcomm, Incorporated | Apparatus and method for prioritized apportionment of transmission power in a multi-carrier terminal |
US7616711B2 (en) * | 2004-07-20 | 2009-11-10 | Qualcomm Incorporated | Frequency domain filtering to improve channel estimation in multicarrier systems |
-
2004
- 2004-12-22 US US11/022,360 patent/US7616711B2/en not_active Expired - Fee Related
-
2005
- 2005-07-11 KR KR1020097009456A patent/KR100940057B1/ko not_active IP Right Cessation
- 2005-07-11 KR KR1020087015380A patent/KR20080065006A/ko not_active Application Discontinuation
- 2005-07-11 BR BRPI0513696-2A patent/BRPI0513696A/pt not_active IP Right Cessation
- 2005-07-11 RU RU2007106082/09A patent/RU2373659C2/ru not_active IP Right Cessation
- 2005-07-11 WO PCT/US2005/024613 patent/WO2006019709A1/en active Application Filing
- 2005-07-11 CA CA002574796A patent/CA2574796A1/en not_active Abandoned
- 2005-07-11 JP JP2007522554A patent/JP2008507902A/ja active Pending
- 2005-07-11 KR KR1020097009452A patent/KR100940056B1/ko not_active IP Right Cessation
- 2005-07-11 EP EP05769255A patent/EP1774740A1/en not_active Withdrawn
- 2005-07-11 AU AU2005275340A patent/AU2005275340A1/en not_active Abandoned
- 2005-07-11 MX MX2007000864A patent/MX2007000864A/es not_active Application Discontinuation
- 2005-07-13 TW TW094123766A patent/TW200629825A/zh unknown
-
2007
- 2007-01-21 IL IL180826A patent/IL180826A0/en unknown
- 2007-02-16 NO NO20070901A patent/NO20070901L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CA2574796A1 (en) | 2006-02-23 |
KR20090051275A (ko) | 2009-05-21 |
TW200629825A (en) | 2006-08-16 |
NO20070901L (no) | 2007-04-18 |
JP2008507902A (ja) | 2008-03-13 |
US20060018393A1 (en) | 2006-01-26 |
KR100940056B1 (ko) | 2010-02-04 |
RU2007106082A (ru) | 2008-08-27 |
US7616711B2 (en) | 2009-11-10 |
RU2373659C2 (ru) | 2009-11-20 |
MX2007000864A (es) | 2007-04-18 |
AU2005275340A1 (en) | 2006-02-23 |
IL180826A0 (en) | 2007-06-03 |
KR20080065006A (ko) | 2008-07-10 |
KR100940057B1 (ko) | 2010-02-04 |
KR20090051783A (ko) | 2009-05-22 |
WO2006019709A1 (en) | 2006-02-23 |
EP1774740A1 (en) | 2007-04-18 |
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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. |