CA2208626A1 - Synchronization method and system for a digital receiver - Google Patents
Synchronization method and system for a digital receiverInfo
- Publication number
- CA2208626A1 CA2208626A1 CA002208626A CA2208626A CA2208626A1 CA 2208626 A1 CA2208626 A1 CA 2208626A1 CA 002208626 A CA002208626 A CA 002208626A CA 2208626 A CA2208626 A CA 2208626A CA 2208626 A1 CA2208626 A1 CA 2208626A1
- Authority
- CA
- Canada
- Prior art keywords
- synchronization
- frequency offset
- carrier frequency
- obtaining
- symbol
- 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.)
- Granted
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
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
- H04L27/266—Fine or fractional frequency offset determination and 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
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe 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
- H04L27/2659—Coarse or integer frequency offset determination and 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
- H04L27/2655—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
- H04L27/26—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
Abstract
A synchronization system and method for obtaining frame, carrier, and sampling synchronization of an input OFDM modulated digital signal having a pseudoperiodic second symbol. The system includes an apparatus for obtaining frame synchronization, and the apparatus includes an envelope detector to detect the first symbol of the input signal, and a differentiator connected to the envelope detector to detect the second symbol. The differentiator includes a first filter having a transfer function H(z) = (1 + Z-1) and a second filter having a transfer function Hp(z) = (1 - Z-n/2 + Z-n - Z-3n/2), where n equals to a number of samples in the input signal. Synchronization of the carrier frequency offset is obtained by first obtaining the fractional carrier frequency offset, and then obtaining the integral carrier frequency offset through a matched filtering process. Sampling frequency synchronization is obtained through the matched filtering process for determining integral carrier frequency offset.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/872,671 | 1997-06-11 | ||
US08/872,671 US6058101A (en) | 1997-06-11 | 1997-06-11 | Synchronization method and system for a digital receiver |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2208626A1 true CA2208626A1 (en) | 1998-12-11 |
CA2208626C CA2208626C (en) | 2002-03-05 |
Family
ID=25360079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002208626A Expired - Lifetime CA2208626C (en) | 1997-06-11 | 1997-06-23 | Synchronization method and system for a digital receiver |
Country Status (5)
Country | Link |
---|---|
US (1) | US6058101A (en) |
EP (2) | EP0884878B1 (en) |
CA (1) | CA2208626C (en) |
DE (2) | DE69736866T2 (en) |
TW (1) | TW431098B (en) |
Families Citing this family (67)
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ATE232034T1 (en) * | 1996-09-02 | 2003-02-15 | St Microelectronics Nv | IMPROVEMENTS IN, OR RELATING TO, MULTI CARRIER TRANSMISSION SYSTEMS |
DE19653261A1 (en) * | 1996-12-20 | 1998-06-25 | Alsthom Cge Alcatel | Synchronous digital message transmission system, control device, network element and central clock generator |
KR100238047B1 (en) * | 1997-02-25 | 2000-01-15 | 윤종용 | Carrier frequency synchronization method and apparatus of quadrature frequecy division multiplexing transfer system |
JP3568180B2 (en) * | 1997-06-12 | 2004-09-22 | 株式会社日立国際電気 | Data transmission equipment |
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JPH1155212A (en) * | 1997-07-31 | 1999-02-26 | Sony Corp | Digital information signal receiving device |
US6253347B1 (en) * | 1997-11-05 | 2001-06-26 | Hitachi America, Ltd. | Automatic synchronization circuit for trellis decoder |
EP2254300B1 (en) * | 1998-01-06 | 2013-05-15 | Mosaid Technologies Incorporated | Multicarrier modulation system with variable symbol rates |
US6876675B1 (en) * | 1998-02-06 | 2005-04-05 | Cisco Technology, Inc. | Synchronization in OFDM systems |
JPH11252038A (en) * | 1998-02-27 | 1999-09-17 | Sony Corp | Receiver for digital broadcasting |
WO1999053666A1 (en) * | 1998-04-14 | 1999-10-21 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Coarse frequency synchronisation in multicarrier systems |
US6259893B1 (en) * | 1998-11-03 | 2001-07-10 | Ibiquity Digital Corporation | Method and apparatus for reduction of FM interference for FM in-band on-channel digital audio broadcasting system |
FR2788907B1 (en) * | 1999-01-27 | 2001-04-13 | St Microelectronics Sa | GUARD INTERVAL GENERATION IN A DMT MODULATION TRANSMISSION |
US6074086A (en) * | 1999-04-26 | 2000-06-13 | Intellon Corporation | Synchronization of OFDM signals with improved windowing |
US6891792B1 (en) * | 1999-05-14 | 2005-05-10 | At&T Corp. | Method for estimating time and frequency offset in an OFDM system |
JP3675670B2 (en) * | 1999-05-27 | 2005-07-27 | パイオニア株式会社 | Receiver |
DE69922794T2 (en) * | 1999-06-16 | 2005-05-19 | Sony International (Europe) Gmbh | Optimized synchronization preamble structure for OFDM system |
US6807147B1 (en) | 1999-06-23 | 2004-10-19 | At&T Wireless Services, Inc. | Methods and apparatus for use in obtaining frame synchronization in an OFDM communication system |
KR100362571B1 (en) * | 1999-07-05 | 2002-11-27 | 삼성전자 주식회사 | Frequency offset compensation apparatus and method using pilot symbol in orthogonal frequency division multiplex system |
JP3190318B2 (en) * | 1999-07-07 | 2001-07-23 | 三菱電機株式会社 | Frequency error estimating apparatus and frequency error estimating method |
US6810074B1 (en) * | 1999-09-06 | 2004-10-26 | Samsung Electronics Co., Ltd. | Apparatus and method for detecting a received on-off keying signal in a CDMA mobile communication system |
DE10039902B4 (en) * | 2000-08-16 | 2011-04-28 | Rohde & Schwarz Gmbh & Co. Kg | Method for frequency and time synchronization of a receiver |
NZ506558A (en) * | 2000-08-25 | 2003-04-29 | Ind Res Ltd | A broadband indoor communication system using ofdm |
US6560303B1 (en) * | 2000-10-26 | 2003-05-06 | Comsat Corporation | Joint frame, carrier and clock synchronization scheme |
CN1141815C (en) * | 2000-12-18 | 2004-03-10 | 信息产业部电信传输研究所 | Frequency automatic corrector for CDMA multipath fading channel |
US7012881B2 (en) * | 2000-12-29 | 2006-03-14 | Samsung Electronic Co., Ltd. | Timing and frequency offset estimation scheme for OFDM systems by using an analytic tone |
NZ509688A (en) * | 2001-02-01 | 2003-06-30 | Ind Res Ltd | Maximum likelihood sychronisation (estimating time delay) for wireless digital communications system using a pilot symbol |
US6473420B1 (en) * | 2001-02-16 | 2002-10-29 | Harris Corporation | Wideband ranging process for frequency acquisition |
US8619922B1 (en) | 2002-02-04 | 2013-12-31 | Marvell International Ltd. | Method and apparatus for acquisition and tracking of orthogonal frequency division multiplexing symbol timing, carrier frequency offset and phase noise |
US7218691B1 (en) | 2001-03-05 | 2007-05-15 | Marvell International Ltd. | Method and apparatus for estimation of orthogonal frequency division multiplexing symbol timing and carrier frequency offset |
DE10112773B4 (en) * | 2001-03-16 | 2012-09-20 | Rohde & Schwarz Gmbh & Co Kg | Method for frequency and time synchronization of an OFDM receiver |
US6868130B2 (en) * | 2001-04-25 | 2005-03-15 | Silicon Integrated Systems Corp. | Transmission mode detector for digital receiver |
KR20020082642A (en) * | 2001-04-25 | 2002-10-31 | 주식회사 호서텔넷 | Frame synchronizing detector and its method in ReFLEX transmission |
US6959050B2 (en) * | 2001-06-15 | 2005-10-25 | Motorola, Inc. | Method and apparatus for synchronizing an OFDM signal |
US7035364B2 (en) * | 2001-06-29 | 2006-04-25 | Motorola, Inc. | Digital receiver fast frequency and time acquisition system using a single synchronization word and method of using same |
US6985531B2 (en) * | 2001-07-13 | 2006-01-10 | Cyntrust Communications, Inc. | Dual domain differential encoder/decoder |
KR100807886B1 (en) * | 2001-09-24 | 2008-02-27 | 에스케이 텔레콤주식회사 | Receiver of orthogonal frequency division multiple system |
US7065171B1 (en) * | 2001-10-22 | 2006-06-20 | Cingular Wireless Ii, Llc | Method for synchronization of received signals |
KR100790114B1 (en) * | 2002-03-16 | 2007-12-31 | 삼성전자주식회사 | Adaptive pilot carrier allocation method and apparatus in an orthogonal frequency division multiple access system |
US8094591B1 (en) * | 2002-03-19 | 2012-01-10 | Good Technology, Inc. | Data carrier detector for a packet-switched communication network |
KR100553544B1 (en) * | 2002-08-31 | 2006-02-20 | 삼성탈레스 주식회사 | Method of frequency offset estimation and channel equalization in burst OFDM transmission system |
KR100492359B1 (en) * | 2002-09-18 | 2005-05-31 | 한기열 | Symbol timing detection apparatus of ofdm system |
ES2212744B2 (en) | 2003-01-10 | 2005-03-16 | Diseño De Sistemas En Silicio, S.A. | SYNCHRONIZATION PROCEDURE IN THE DOMAIN OF TIME AND FREQUENCY OF MULTIPLE EQUIPMENT IN A TRANSMISSION SYSTEM WITH OFDM MODULATION. |
JP4338532B2 (en) * | 2003-02-21 | 2009-10-07 | 富士通株式会社 | Communication device |
US7277457B2 (en) * | 2003-10-03 | 2007-10-02 | Motorola, Inc. | Sync bursts for frequency offset compensation |
KR100587310B1 (en) * | 2004-08-18 | 2006-06-08 | 엘지전자 주식회사 | Frequency recovery apparatus and DVB-H receiver |
KR100720546B1 (en) * | 2004-12-17 | 2007-05-22 | 엘지전자 주식회사 | Method and Apparatus for synchronization acquisition in Digital receiver |
US8488477B2 (en) * | 2006-06-16 | 2013-07-16 | Qualcomm Incorporated | Encoding information in beacon signals |
US7876863B2 (en) * | 2006-08-10 | 2011-01-25 | Cisco Technology, Inc. | Method and system for improving timing position estimation in wireless communications networks |
KR100770898B1 (en) * | 2006-09-29 | 2007-10-26 | 삼성전자주식회사 | Apparatus and method for estimating noise in a mobile communication system |
KR101405965B1 (en) * | 2007-06-25 | 2014-06-12 | 엘지전자 주식회사 | digital broadcasting system and data processing method |
KR101339424B1 (en) | 2007-07-16 | 2013-12-09 | 삼성전자주식회사 | method and apparatus of estimating sampling frequency offset, and sampling timing recovery loop having the apparatus |
US20090135799A1 (en) * | 2007-11-27 | 2009-05-28 | Harris Corporation | Wireless communications device including path searcher with common coherent correlator and related methods |
US7961816B2 (en) * | 2007-11-28 | 2011-06-14 | Industrial Technology Research Institute | Device for and method of signal synchronization in a communication system |
CN102246512B (en) * | 2008-12-11 | 2014-03-12 | Lg电子株式会社 | Method of transmitting and receiving signal and apparatus for transmitting and receiving signal |
KR101016946B1 (en) * | 2008-12-16 | 2011-02-28 | 한국과학기술원 | Apparatus for receiving t-dmb signal and the method of operating the same |
JP5515718B2 (en) * | 2009-12-17 | 2014-06-11 | 株式会社Jvcケンウッド | Wireless communication apparatus and wireless communication method |
TWI394026B (en) * | 2010-01-07 | 2013-04-21 | Richtek Technology Corp | Clock generator and interleaved phase clock synchronization apparauts and method using the clock generator |
CN102611907B (en) * | 2012-03-16 | 2014-04-09 | 清华大学 | Multi-resolution video in-situ filtering method and multi-resolution video in-situ filtering device |
CN103458495A (en) * | 2012-05-30 | 2013-12-18 | 富士通株式会社 | Signal synchronization method and signal synchronization device in carrier aggregation system |
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US9237002B2 (en) | 2014-01-30 | 2016-01-12 | Imagine Communications Corp. | Null-gating signal detection |
US9647719B2 (en) * | 2015-02-16 | 2017-05-09 | Federated Wireless, Inc. | Method, system, and apparatus for spectrum sensing of radar signals |
KR101811221B1 (en) * | 2016-02-17 | 2017-12-21 | 주식회사 이노와이어리스 | method for processing WCDMA signal timing offset for signal analyzing equipment |
CA3053276C (en) | 2017-08-10 | 2023-10-17 | Huawei Technologies Co., Ltd. | Transmitting device, receiving device and methods thereof |
CN114915316B (en) * | 2022-03-31 | 2023-03-24 | 中国人民解放军战略支援部队航天工程大学 | Band-limited direct sequence spread spectrum signal digital code tracking method based on frequency domain processing |
US11722980B1 (en) * | 2022-12-12 | 2023-08-08 | Ultralogic 6G, Llc | Guard-space timestamp point for precision synchronization in 5G and 6G |
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JPS5853352B2 (en) * | 1979-10-03 | 1983-11-29 | 日本電信電話株式会社 | speech synthesizer |
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US5444697A (en) * | 1993-08-11 | 1995-08-22 | The University Of British Columbia | Method and apparatus for frame synchronization in mobile OFDM data communication |
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JP3130752B2 (en) * | 1995-02-24 | 2001-01-31 | 株式会社東芝 | OFDM transmission receiving method and transmitting / receiving apparatus |
SE514986C2 (en) * | 1995-03-01 | 2001-05-28 | Telia Ab | Method and device for synchronization with OFDM systems |
GB2307155B (en) * | 1995-11-02 | 1999-09-15 | British Broadcasting Corp | Synchronisation of OFDM signals |
US5751777A (en) * | 1996-05-03 | 1998-05-12 | Symmetricom, Inc. | Multiple input frequency locked loop |
-
1997
- 1997-06-11 US US08/872,671 patent/US6058101A/en not_active Expired - Lifetime
- 1997-06-23 CA CA002208626A patent/CA2208626C/en not_active Expired - Lifetime
- 1997-08-01 DE DE69736866T patent/DE69736866T2/en not_active Expired - Lifetime
- 1997-08-01 EP EP97113328A patent/EP0884878B1/en not_active Expired - Lifetime
- 1997-08-01 DE DE69727792T patent/DE69727792T2/en not_active Expired - Lifetime
- 1997-08-01 EP EP04004148A patent/EP1434403B1/en not_active Expired - Lifetime
-
1998
- 1998-04-28 TW TW087106485A patent/TW431098B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
TW431098B (en) | 2001-04-21 |
DE69736866D1 (en) | 2006-12-07 |
CA2208626C (en) | 2002-03-05 |
DE69727792D1 (en) | 2004-04-01 |
DE69736866T2 (en) | 2007-03-01 |
EP0884878B1 (en) | 2004-02-25 |
EP1434403A1 (en) | 2004-06-30 |
US6058101A (en) | 2000-05-02 |
EP1434403B1 (en) | 2006-10-25 |
DE69727792T2 (en) | 2004-08-05 |
EP0884878A3 (en) | 2002-01-09 |
EP0884878A2 (en) | 1998-12-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20170623 |