DE60038047D1 - Hogonalen frequenzmultiplexübertragungssystem durch analyse der nebenzipfel von pilotträgern - Google Patents
Hogonalen frequenzmultiplexübertragungssystem durch analyse der nebenzipfel von pilotträgernInfo
- Publication number
- DE60038047D1 DE60038047D1 DE60038047T DE60038047T DE60038047D1 DE 60038047 D1 DE60038047 D1 DE 60038047D1 DE 60038047 T DE60038047 T DE 60038047T DE 60038047 T DE60038047 T DE 60038047T DE 60038047 D1 DE60038047 D1 DE 60038047D1
- Authority
- DE
- Germany
- Prior art keywords
- analysis
- transmission system
- multiplex transmission
- side pipes
- pilot carriers
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 title 1
- 239000000969 carrier Substances 0.000 title 1
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
- 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
- H04L27/2662—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
- H04L27/2649—Demodulators
- H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0044—Control loops for carrier regulation
- H04L2027/0063—Elements of loops
- H04L2027/0065—Frequency error detectors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Discrete Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/471,457 US6628735B1 (en) | 1999-12-22 | 1999-12-22 | Correction of a sampling frequency offset in an orthogonal frequency division multiplexing system |
US471457 | 1999-12-22 | ||
PCT/US2000/034620 WO2001047204A1 (en) | 1999-12-22 | 2000-12-20 | Correction of a sampling frequency offset in an orthogonal frequency division multiplexing system by sidelobe analysis of pilot subcarriers |
Publications (2)
Publication Number | Publication Date |
---|---|
DE60038047D1 true DE60038047D1 (de) | 2008-03-27 |
DE60038047T2 DE60038047T2 (de) | 2009-02-05 |
Family
ID=23871705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE60038047T Expired - Lifetime DE60038047T2 (de) | 1999-12-22 | 2000-12-20 | Korrektur eines abtastfrequenzfehlers in einem orthogonalen frequenzmultiplexübertragungssystem durch analyse der nebenzipfel von pilotträgern |
Country Status (10)
Country | Link |
---|---|
US (1) | US6628735B1 (de) |
EP (1) | EP1245104B1 (de) |
JP (1) | JP4808888B2 (de) |
KR (1) | KR100736062B1 (de) |
CN (1) | CN1264321C (de) |
AU (1) | AU2442301A (de) |
BR (1) | BR0016599A (de) |
DE (1) | DE60038047T2 (de) |
MX (1) | MXPA02006269A (de) |
WO (1) | WO2001047204A1 (de) |
Families Citing this family (67)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6539063B1 (en) * | 1999-02-18 | 2003-03-25 | Ibiquity Digital Corporation | System and method for recovering symbol timing offset and carrier frequency error in an OFDM digital audio broadcast system |
US6928047B1 (en) * | 1999-09-11 | 2005-08-09 | The University Of Delaware | Precoded OFDM systems robust to spectral null channels and vector OFDM systems with reduced cyclic prefix length |
WO2001048492A1 (en) * | 1999-12-23 | 2001-07-05 | Agilent Technologies Inc. A Delaware Corporation | Minimizing windowing effects in particular for signal recovery |
US6847693B1 (en) * | 2000-05-16 | 2005-01-25 | 3Com Corporation | Method and device providing data derived timing recovery for multicarrier communications |
US7058141B1 (en) * | 2000-06-02 | 2006-06-06 | Nec Usa, Inc. | MLSE decoding of PRS type inter-bin interference in receiver-end windowed DMT system |
US6687309B1 (en) * | 2000-09-29 | 2004-02-03 | Agilent Technologies, Inc. | System for estimating carrier frequencies of quadrature amplitude modulated signals having high symbol rates |
US20020176519A1 (en) * | 2001-03-08 | 2002-11-28 | Alain Chiodini | Coarse frequency offset estimation |
US20020172183A1 (en) * | 2001-05-17 | 2002-11-21 | Josef Eichinger | Method and device for transmitting data in radio channels with strong multipath propagation and increased data volume in a radio communication system |
ES2188370B1 (es) * | 2001-05-21 | 2004-10-16 | Diseño De Sistemas En Silicio, S.A. | Procedimiento para la sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto a multipunto con modulacion ofdm. |
US7394864B2 (en) * | 2001-07-06 | 2008-07-01 | Conexant, Inc. | Mixed waveform configuration for wireless communications |
US7088787B2 (en) * | 2001-09-24 | 2006-08-08 | Atheros Communications, Inc. | Post-FFT scaling to reduce multiple effects |
US7020180B2 (en) * | 2001-10-04 | 2006-03-28 | Qualcomm Inc. | Method and apparatus for acquiring pilots over code space and frequency errors in a CDMA communication system |
US7116731B2 (en) * | 2002-06-03 | 2006-10-03 | Vixs, Inc. | Method and apparatus for adjusting symbol timing and/or symbol positioning of a receive burst of data within a radio receiver |
US7227835B2 (en) * | 2002-06-27 | 2007-06-05 | Thomson Licensing | Method and apparatus for adjacent channel interference reduction in an orthogonal frequency division multiplexing (OFDM) receiver |
US7453792B2 (en) * | 2002-11-14 | 2008-11-18 | Edgewater Computer Systems, Inc. | Receiver architecture for pilot based OFDM systems |
ES2212744B2 (es) * | 2003-01-10 | 2005-03-16 | Diseño De Sistemas En Silicio, S.A. | Procedimiento de sincronizacion en el dominio del tiempo y de la frecuencia de multiples equipos en un sistema de transmision con modulacion ofdm. |
JP4109556B2 (ja) * | 2003-01-31 | 2008-07-02 | 松下電器産業株式会社 | Ofdm信号の衝突位置検出装置、ofdm受信装置及びofdm信号の衝突位置検出方法及びofdm受信方法 |
CN100378463C (zh) * | 2003-03-19 | 2008-04-02 | 株式会社爱得万测试 | 一种检波装置和方法 |
DE10321743B4 (de) * | 2003-05-14 | 2005-07-07 | Infineon Technologies Ag | Verbesserte Kanaldecodierung bei der Mehrträger-Signalübertragung durch DC-Offset- und Trägerfrequenz-Offset-abhängige Gewichtung von Zuverlässigkeitsinformationen |
US8121213B2 (en) * | 2003-07-25 | 2012-02-21 | Panasonic Corporation | Modulation device, demodulation device, modulation method and demodulation method |
US7254204B2 (en) * | 2003-08-05 | 2007-08-07 | Afa Technologies, Inc. | Method and system for OFDM symbol timing synchronization |
US20050047537A1 (en) * | 2003-08-29 | 2005-03-03 | Ting-Yuan Cheng | Method and system of signal path tracking |
GB0327041D0 (en) * | 2003-11-21 | 2003-12-24 | Roke Manor Research | Apparatus and methods |
EP1641206A3 (de) | 2004-09-08 | 2007-01-03 | Tata Consultancy Services Limited | Sub-träger einer niedrigeren Modulationsordnung zur semi-blinden Kanalschätzung in einem OFDM System |
KR100651459B1 (ko) * | 2004-10-11 | 2006-11-29 | 삼성전자주식회사 | 디지털 방송 수신 기능을 구비한 휴대용 단말기에서디지털 방송 채널 등록 및 표시방법 |
US8019032B2 (en) * | 2005-02-04 | 2011-09-13 | Qualcomm Incorporated | Method and system for channel equalization |
KR100770924B1 (ko) * | 2005-02-04 | 2007-10-26 | 삼성전자주식회사 | 무선 통신 시스템에서 주파수 오차 보상 장치 및 방법 |
US8175123B2 (en) | 2005-03-10 | 2012-05-08 | Qualcomm Incorporated | Collection window positioning using time tracking information |
US8675631B2 (en) | 2005-03-10 | 2014-03-18 | Qualcomm Incorporated | Method and system for achieving faster device operation by logical separation of control information |
US8009775B2 (en) * | 2005-03-11 | 2011-08-30 | Qualcomm Incorporated | Automatic frequency control for a wireless communication system with multiple subcarriers |
KR100720582B1 (ko) * | 2005-03-14 | 2007-05-22 | 엘지전자 주식회사 | 디지털 방송 수신기의 동기 장치 및 그 방법 |
US9143305B2 (en) * | 2005-03-17 | 2015-09-22 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
WO2006117721A2 (en) * | 2005-05-02 | 2006-11-09 | Nxp B.V. | Receiver with adaptive strobe offset adjustment |
US7292166B2 (en) * | 2005-05-26 | 2007-11-06 | Advantest Corporation | Analog/digital converter and program therefor |
US20070058752A1 (en) * | 2005-07-29 | 2007-03-15 | Faraday Technology Corp. | Methods and systems for estimating sampling frequency offset of OFDM symbols |
US7808883B2 (en) * | 2005-08-08 | 2010-10-05 | Nokia Corporation | Multicarrier modulation with enhanced frequency coding |
KR100699490B1 (ko) * | 2005-08-22 | 2007-03-26 | 삼성전자주식회사 | 샘플링 주파수 오프셋 추정방법 및 이 방법이 적용되는ofdm 시스템 |
JP4398416B2 (ja) * | 2005-10-07 | 2010-01-13 | 株式会社エヌ・ティ・ティ・ドコモ | 変調装置、変調方法、復調装置、及び復調方法 |
US7623607B2 (en) | 2005-10-31 | 2009-11-24 | Qualcomm Incorporated | Methods and apparatus for determining timing in a wireless communication system |
US8948329B2 (en) | 2005-12-15 | 2015-02-03 | Qualcomm Incorporated | Apparatus and methods for timing recovery in a wireless transceiver |
US8023575B2 (en) * | 2006-06-13 | 2011-09-20 | Bandspeed, Inc. | Approach for spectrum analysis in a receiver |
DE602007000507D1 (de) * | 2007-02-14 | 2009-03-12 | Ntt Docomo Inc | Empfängergerät, Sendegerät und Kommunikationssystem zur Erfassung von Schmalbandinterferenz in einem Mehrträgerempfangssignal |
DE602007000566D1 (de) * | 2007-02-14 | 2009-04-02 | Ntt Docomo Inc | Empfängergerät zur Erfassung von Schmalbandinterferenz in einem Mehrträgerempfangssignal |
US8131218B2 (en) * | 2007-04-13 | 2012-03-06 | General Dynamics C4 Systems, Inc. | Methods and apparatus for wirelessly communicating signals that include embedded synchronization/pilot sequences |
GB0715462D0 (en) * | 2007-08-08 | 2007-09-19 | Cambridge Silicon Radio Ltd | FFT clock adjustment |
US8630365B2 (en) * | 2008-01-29 | 2014-01-14 | Lantiq Deutschland Gmbh | Transceiver for communicating over different media types |
US7865202B2 (en) * | 2008-02-27 | 2011-01-04 | Broadcom Corporation | Method and system for I/Q branch equalization in OFDM systems |
US8379752B2 (en) * | 2008-03-19 | 2013-02-19 | General Dynamics C4 Systems, Inc. | Methods and apparatus for multiple-antenna communication of wireless signals with embedded synchronization/pilot sequences |
US8331420B2 (en) * | 2008-04-14 | 2012-12-11 | General Dynamics C4 Systems, Inc. | Methods and apparatus for multiple-antenna communication of wireless signals with embedded pilot signals |
US8290458B2 (en) * | 2008-06-30 | 2012-10-16 | Entropic Communications, Inc. | System and method for IQ imbalance estimation using loopback with frequency offset |
JP5294030B2 (ja) * | 2009-07-24 | 2013-09-18 | ソニー株式会社 | 受信装置および方法、並びにプログラム |
EP2290893A1 (de) | 2009-08-24 | 2011-03-02 | Nxp B.V. | Frequenzsynchronisierung in einem OFDM Empfänger durch sliding Fourier Transform |
KR101130659B1 (ko) * | 2009-08-25 | 2012-04-02 | 전자부품연구원 | Ofdm 신호 동기화 장치 및 방법 |
US8355466B2 (en) * | 2009-09-25 | 2013-01-15 | General Dynamics C4 Systems, Inc. | Cancelling non-linear power amplifier induced distortion from a received signal by moving incorrectly estimated constellation points |
US8744009B2 (en) * | 2009-09-25 | 2014-06-03 | General Dynamics C4 Systems, Inc. | Reducing transmitter-to-receiver non-linear distortion at a transmitter prior to estimating and cancelling known non-linear distortion at a receiver |
US8854945B2 (en) * | 2011-11-09 | 2014-10-07 | Qualcomm Incorporated | Enhanced adaptive gain control in heterogeneous networks |
US10050744B2 (en) * | 2012-03-16 | 2018-08-14 | Analog Devices, Inc. | Real-time I/Q imbalance correction for wide-band RF receiver |
CN103095638B (zh) * | 2012-12-19 | 2016-06-08 | 西安电子科技大学 | 一种多径衰落信道下ofdm***的采样频率偏移盲估算方法 |
US9281907B2 (en) | 2013-03-15 | 2016-03-08 | Analog Devices, Inc. | Quadrature error correction using polynomial models in tone calibration |
CN103248443B (zh) * | 2013-05-06 | 2015-04-29 | 宁波大学 | 时间异步且循环前缀长度已知情况下的ofdm频谱感知方法 |
CN103248441B (zh) * | 2013-05-06 | 2015-04-29 | 宁波大学 | 时间异步且循环前缀长度未知情况下的ofdm频谱感知方法 |
CN103248442B (zh) * | 2013-05-06 | 2015-04-29 | 宁波大学 | 一种时间同步情况下的ofdm信号频谱感知方法 |
KR102088622B1 (ko) * | 2013-11-13 | 2020-03-13 | 현대모비스 주식회사 | Adc의 주파수 오차 저장 장치 및 adc의 주파수 오차 보정 장치 |
US10701685B2 (en) * | 2014-03-31 | 2020-06-30 | Huawei Technologies Co., Ltd. | Method and apparatus for asynchronous OFDMA/SC-FDMA |
CN104618294B (zh) * | 2015-02-02 | 2018-10-09 | 四川九洲电器集团有限责任公司 | 基于训练序列的ofdm整数倍频偏快速估算方法及*** |
US9538537B1 (en) | 2015-08-11 | 2017-01-03 | Phasorlab, Inc. | Blind carrier synchronization method for OFDM wireless communication systems |
US10243682B2 (en) * | 2016-08-22 | 2019-03-26 | Phasorlab, Inc. | Time-domain and frequency-domain approach to frequency offset correction method for LTE SC-FDMA uplink |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5003552A (en) | 1989-11-20 | 1991-03-26 | Unisys Corporation | Carrier aided code tracking loop |
SG44771A1 (en) * | 1991-02-28 | 1997-12-19 | Philips Electronics Nv | System for broadcasting and receiving digital data receiver and transmitter for use in such system |
SE500986C2 (sv) | 1993-07-20 | 1994-10-17 | Telia Ab | Förfarande och anordning för synkronisering i digitalt transmissionssystem av typen OFDM |
US5444697A (en) | 1993-08-11 | 1995-08-22 | The University Of British Columbia | Method and apparatus for frame synchronization in mobile OFDM data communication |
JP3041175B2 (ja) | 1993-11-12 | 2000-05-15 | 株式会社東芝 | Ofdm同期復調回路 |
US5710792A (en) | 1993-12-15 | 1998-01-20 | Ntt Mobile Communications Network, Inc. | Adaptive equalizer |
US5774450A (en) | 1995-01-10 | 1998-06-30 | Matsushita Electric Industrial Co., Ltd. | Method of transmitting orthogonal frequency division multiplexing signal and receiver thereof |
JP3130752B2 (ja) | 1995-02-24 | 2001-01-31 | 株式会社東芝 | Ofdm伝送受信方式及び送受信装置 |
SE514986C2 (sv) | 1995-03-01 | 2001-05-28 | Telia Ab | Metod och anordning för synkronisering vid OFDM-system |
JP3145003B2 (ja) | 1995-03-23 | 2001-03-12 | 株式会社東芝 | 直交周波数分割多重伝送方式とその送信装置および受信装置 |
US5537121A (en) | 1995-04-28 | 1996-07-16 | Trimble Navigation Limited | Carrier phase multipath reduction technique |
JP3079950B2 (ja) | 1995-06-20 | 2000-08-21 | 松下電器産業株式会社 | 直交周波数分割多重変調信号の受信装置及び伝送方法 |
US5790516A (en) | 1995-07-14 | 1998-08-04 | Telefonaktiebolaget Lm Ericsson | Pulse shaping for data transmission in an orthogonal frequency division multiplexed system |
JPH09130362A (ja) | 1995-10-30 | 1997-05-16 | Sony Corp | 受信装置および受信方法 |
US5764630A (en) | 1996-03-25 | 1998-06-09 | Stanford Telecommunications, Inc. | Forward link carrier recovery in an OCDMA spread spectrum communication system without a pilot tone |
US5732113A (en) | 1996-06-20 | 1998-03-24 | Stanford University | Timing and frequency synchronization of OFDM signals |
JP3726857B2 (ja) | 1997-05-02 | 2005-12-14 | ソニー株式会社 | 受信装置および受信方法 |
KR100265735B1 (ko) * | 1997-11-25 | 2000-09-15 | 윤종용 | Fft윈도우위치복원과샘플링클럭제어가연동되는ofdm수신장치및그방법 |
-
1999
- 1999-12-22 US US09/471,457 patent/US6628735B1/en not_active Expired - Fee Related
-
2000
- 2000-12-20 EP EP00988191A patent/EP1245104B1/de not_active Expired - Lifetime
- 2000-12-20 MX MXPA02006269A patent/MXPA02006269A/es active IP Right Grant
- 2000-12-20 WO PCT/US2000/034620 patent/WO2001047204A1/en active IP Right Grant
- 2000-12-20 BR BR0016599-9A patent/BR0016599A/pt not_active IP Right Cessation
- 2000-12-20 DE DE60038047T patent/DE60038047T2/de not_active Expired - Lifetime
- 2000-12-20 JP JP2001547814A patent/JP4808888B2/ja not_active Expired - Fee Related
- 2000-12-20 CN CNB008190267A patent/CN1264321C/zh not_active Expired - Fee Related
- 2000-12-20 KR KR1020027008070A patent/KR100736062B1/ko not_active IP Right Cessation
- 2000-12-20 AU AU24423/01A patent/AU2442301A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
MXPA02006269A (es) | 2004-10-15 |
EP1245104A1 (de) | 2002-10-02 |
KR100736062B1 (ko) | 2007-07-06 |
JP2003518826A (ja) | 2003-06-10 |
JP4808888B2 (ja) | 2011-11-02 |
WO2001047204A1 (en) | 2001-06-28 |
WO2001047204A8 (en) | 2001-10-11 |
CN1264321C (zh) | 2006-07-12 |
KR20020062371A (ko) | 2002-07-25 |
EP1245104B1 (de) | 2008-02-13 |
CN1435037A (zh) | 2003-08-06 |
BR0016599A (pt) | 2002-09-10 |
DE60038047T2 (de) | 2009-02-05 |
US6628735B1 (en) | 2003-09-30 |
AU2442301A (en) | 2001-07-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |