KR100861672B1 - 멀티캐리어 신호의 보호 구간을 이용하는 채널 추정 - Google Patents
멀티캐리어 신호의 보호 구간을 이용하는 채널 추정 Download PDFInfo
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- KR100861672B1 KR100861672B1 KR1020057007688A KR20057007688A KR100861672B1 KR 100861672 B1 KR100861672 B1 KR 100861672B1 KR 1020057007688 A KR1020057007688 A KR 1020057007688A KR 20057007688 A KR20057007688 A KR 20057007688A KR 100861672 B1 KR100861672 B1 KR 100861672B1
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- prefixes
- prefix
- vector
- division multiplexing
- orthogonal frequency
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- 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
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
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- 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
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- 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
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- 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
- H04L25/0238—Channel estimation using blind estimation
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- 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
- H04L25/024—Channel estimation channel estimation algorithms
- H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
-
- 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
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
-
- 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
- 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
- H04L27/2675—Pilot or known symbols
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
Claims (16)
- 직교 주파수 분할 다중('OFDM')을 이용하는 통신 방법으로서,보호 구간(guard interval)들로서의 프리픽스들(prefixes)을 상기 비트 스트림들에 삽입하는 단계,상기 송신기로부터 수신기로 상기 OFDM 심볼들을 송신하는 단계,
- 제 1 항에 있어서, 상기 채널 임펄스 응답()을 추정하는 단계는, 수신된 프리픽스 신호 변환()을 생성하기 위해, 상기 프리픽스들 중 하나( 내지 중 하나)에 대응하는 상기 수신된 신호 성분들 및 상기 프리픽스들 중 후속하는 하나( 내지 중 하나)에 대응하는 상기 수신된 신호 성분들을 포함하는 제 1 벡터()에 대해 푸리에 변환을 행하는 단계, 공지된 프리픽스 변환()을 생성하기 위해 상기 프리픽스들( 내지 , 내지 ) 의 대응하는 성분들의 상기 공지된 값들을 포함하는 제 2 벡터()에 대해 푸리에 변환을 행하는 단계, 및 상기 공지된 프리픽스 변환()에 의해 상기 수신된 프리픽스 신호 변환()의 성분별 제산(component-by-component division)을 행하는 단계를 포함하는, 직교 주파수 분할 다중을 이용하는 통신 방법.
- 제 8 항에 있어서, 상기 프리픽스들은 가중 계수들(, )에 의해 승산된 상기 심볼들과 공통인 벡터()를 포함하며, 상기 가중 계수들은 심볼마다 다르지만 주어진 벡터의 상기 원소들은 동일한 가중 계수에 의해 승산되고, 상기 프리픽스들 중 상기 하나( 내지 중 하나) 및 상기 프리픽스들 중 상기 후속하는 하나( 내지 중 하나)에 대응하는 상기 수신된 신호 성분들은 상기 수신된 프리픽스 신호 변환()을 생성하기 위해 합산하고 상기 푸리에 변환을 행하기 전에 상기 가중 계수(, )의 각각의 값에 의해 가중되는, 직교 주파수 분할 다중을 이용하는 통신 방법.
- 제 8 항에 있어서, 상기 푸리에 변환들은 차원이고, 여기서 는 상기 프리픽스들( 내지 )의 크기이고 은 상기 프리픽스들 사이의 상기 OFDM 신호들의 크기이며, 상기 제 1 벡터()는 크기 의 상기 수신된 프리픽스 신호 변환()을 생성하기 위해, 크기의 제로값 벡터()에 의해 증대된 상기 프리픽스들 중 상기 하나(내지 중 하나) 및 상기 프리픽스들 중 상기 후속하는 하나( 내지 중 하나)에 대응하는 상기 수신된 신호 성분들의 상기 합을 포함하고, 상기 제 2 벡터()는 크기 의 상기 공지된 프리픽스 변환()을 생성하기 위해, 크기 의 상기 제로값 벡터()에 의해 증대된 상기 프리픽스들( 내지 , 내지 )의 상기 공지된 성분들을 포함하는, 직교 주파수 분할 다중을 이용하는 통신 방법.
- 제 1 항에 있어서, 상기 비트 스트림들을 복조하는 단계는, 후속 연산들에 대하여 호환성의 차원들(compatible demensions)을 얻기 위하여, 제로들로 상기 연산자 행렬들(operator matirices) 및 상기 수신된 신호 행렬을 패딩하는 단계, 상기 채널 임펄스 응답 추정 행렬과 상기 공지된 프리픽스 값 행렬을 승산하는 단계, 및 상기 수신된 신호 행렬로부터 상기 결과를 감산하는 단계를 포함하는, 직교 주파수 분할 다중을 이용하는 통신 방법.
- 삭제
- 삭제
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20020292730 EP1416689A1 (en) | 2002-10-31 | 2002-10-31 | Channel estimation using the guard interval of a multicarrier signal |
EP02292730.5 | 2002-10-31 |
Publications (2)
Publication Number | Publication Date |
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KR20050071651A KR20050071651A (ko) | 2005-07-07 |
KR100861672B1 true KR100861672B1 (ko) | 2008-10-07 |
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Application Number | Title | Priority Date | Filing Date |
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KR1020057007688A KR100861672B1 (ko) | 2002-10-31 | 2003-10-30 | 멀티캐리어 신호의 보호 구간을 이용하는 채널 추정 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7450490B2 (ko) |
EP (2) | EP1416689A1 (ko) |
JP (1) | JP4125722B2 (ko) |
KR (1) | KR100861672B1 (ko) |
CN (1) | CN1708965A (ko) |
AU (1) | AU2003303109A1 (ko) |
WO (1) | WO2004064344A1 (ko) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7400573B2 (en) * | 2003-04-29 | 2008-07-15 | Intel Corporation | Dynamic allocation of cyclic extension in orthogonal frequency division multiplexing systems |
JP2005191997A (ja) * | 2003-12-26 | 2005-07-14 | Sanyo Electric Co Ltd | 受信方法および装置 |
US8149685B2 (en) * | 2004-09-03 | 2012-04-03 | University Of South Florida | Covert OFDM transmission using cyclic prefix |
DE102004045075B4 (de) * | 2004-09-15 | 2015-06-03 | IAD Gesellschaft für Informatik, Automatisierung und Datenverarbeitung mbH | Verfahren und Vorrichtung zur Aussparung einstellbarer schmaler Frequenzbänder in einem breitbandigen Sendesignal |
US20060159187A1 (en) * | 2005-01-14 | 2006-07-20 | Haifeng Wang | System and method for utilizing different known guard intervals in single/multiple carrier communication systems |
US7551547B2 (en) * | 2005-01-28 | 2009-06-23 | At&T Intellectual Property I, L.P. | Delay restricted channel estimation for multi-carrier systems |
US7813383B2 (en) * | 2005-03-10 | 2010-10-12 | Qualcomm Incorporated | Method for transmission of time division multiplexed pilot symbols to aid channel estimation, time synchronization, and AGC bootstrapping in a multicast wireless system |
US7929620B2 (en) | 2005-12-08 | 2011-04-19 | Electronics And Telecommunications Research Institute | Blind channel estimation in an orthogonal frequency division multiplexing system |
US8315151B2 (en) * | 2006-01-18 | 2012-11-20 | St-Ericsson Sa | Radio communication system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US5113444A (en) * | 1990-09-05 | 1992-05-12 | Arnold Vobach | Random choice cipher system and method |
US5495432A (en) * | 1994-01-03 | 1996-02-27 | Industrial Technology Research Institute | Apparatus and method for sampling rate conversion |
CA2302289C (en) * | 1996-08-29 | 2005-11-08 | Gregory G. Raleigh | Spatio-temporal processing for communication |
US7027464B1 (en) * | 1999-07-30 | 2006-04-11 | Matsushita Electric Industrial Co., Ltd. | OFDM signal transmission scheme, and OFDM signal transmitter/receiver |
US20020048333A1 (en) * | 2000-05-25 | 2002-04-25 | Nadeem Ahmed | Joint detection in OFDM systems |
US9130810B2 (en) * | 2000-09-13 | 2015-09-08 | Qualcomm Incorporated | OFDM communications methods and apparatus |
US6369758B1 (en) * | 2000-11-01 | 2002-04-09 | Unique Broadband Systems, Inc. | Adaptive antenna array for mobile communication |
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2002
- 2002-10-31 EP EP20020292730 patent/EP1416689A1/en not_active Withdrawn
-
2003
- 2003-10-30 JP JP2004566049A patent/JP4125722B2/ja not_active Expired - Fee Related
- 2003-10-30 US US10/531,785 patent/US7450490B2/en not_active Expired - Fee Related
- 2003-10-30 CN CNA2003801024817A patent/CN1708965A/zh active Pending
- 2003-10-30 KR KR1020057007688A patent/KR100861672B1/ko active IP Right Grant
- 2003-10-30 EP EP03813028.2A patent/EP1559252B1/en not_active Expired - Lifetime
- 2003-10-30 AU AU2003303109A patent/AU2003303109A1/en not_active Abandoned
- 2003-10-30 WO PCT/EP2003/050767 patent/WO2004064344A1/en active Application Filing
Non-Patent Citations (2)
Title |
---|
OFDM with Trailing Zeros versus OFDM with Cyclic Prefix: Links, Comparisons and Application to the Hiperlan/2 System (B.Muquet. et al) |
Reduced Complexity Equalizers for Zero-padded OFDM Transmissions, (B. Muquet. et al) |
Also Published As
Publication number | Publication date |
---|---|
AU2003303109A1 (en) | 2004-08-10 |
US20060120275A1 (en) | 2006-06-08 |
KR20050071651A (ko) | 2005-07-07 |
WO2004064344A1 (en) | 2004-07-29 |
JP4125722B2 (ja) | 2008-07-30 |
EP1559252B1 (en) | 2015-06-17 |
JP2006506921A (ja) | 2006-02-23 |
EP1559252A1 (en) | 2005-08-03 |
US7450490B2 (en) | 2008-11-11 |
EP1416689A1 (en) | 2004-05-06 |
CN1708965A (zh) | 2005-12-14 |
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