CA2103497A1 - Method and Apparatus for Synchronizing a Received Signal in a Digital Radio Communication System - Google Patents

Method and Apparatus for Synchronizing a Received Signal in a Digital Radio Communication System

Info

Publication number
CA2103497A1
CA2103497A1 CA2103497A CA2103497A CA2103497A1 CA 2103497 A1 CA2103497 A1 CA 2103497A1 CA 2103497 A CA2103497 A CA 2103497A CA 2103497 A CA2103497 A CA 2103497A CA 2103497 A1 CA2103497 A1 CA 2103497A1
Authority
CA
Canada
Prior art keywords
synchronization
synchronizing
signal
received signal
communication system
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
Application number
CA2103497A
Other languages
French (fr)
Other versions
CA2103497C (en
Inventor
Phillip David Rasky
James F. Kepler
Gregory Mark Chiasson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of CA2103497A1 publication Critical patent/CA2103497A1/en
Application granted granted Critical
Publication of CA2103497C publication Critical patent/CA2103497C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/713Spread spectrum techniques using frequency hopping
    • H04B1/7156Arrangements for sequence synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00Arrangements for synchronising receiver with transmitter
    • H04L7/04Speed or phase control by synchronisation signals
    • H04L7/041Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/042Detectors therefor, e.g. correlators, state machines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00Arrangements for synchronising receiver with transmitter
    • H04L7/04Speed or phase control by synchronisation signals
    • H04L7/041Speed or phase control by synchronisation signals using special codes as synchronising signal

Abstract

A method and apparatus is provided for synchronizing a received communication signal. A synchronization signal is derived from a received signal having a plurality of synchronization words. Each synchronization word has a predetermined number of synchronization symbols. The synchronization signal is filtered. The filtering is characterized by spacing each filter tap to correspond to synchronization word length increments. Synchronization information is generated which is based on a comparison of the filtered synchronization signal to a threshold. Finally, the synchronization information is output based on a confidence decision derived from the synchronization information.
CA002103497A 1992-12-07 1993-11-19 Method and apparatus for synchronizing a received signal in a digital radio communication system Expired - Fee Related CA2103497C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/988,572 US5428647A (en) 1992-12-07 1992-12-07 Method and apparatus for synchronizing a received signal in a digital radio communication system
US988,572 1992-12-07

Publications (2)

Publication Number Publication Date
CA2103497A1 true CA2103497A1 (en) 1994-06-08
CA2103497C CA2103497C (en) 1999-03-09

Family

ID=25534275

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002103497A Expired - Fee Related CA2103497C (en) 1992-12-07 1993-11-19 Method and apparatus for synchronizing a received signal in a digital radio communication system

Country Status (2)

Country Link
US (1) US5428647A (en)
CA (1) CA2103497C (en)

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US5625573A (en) * 1995-03-01 1997-04-29 Hughes Electronics Fast acquisition of GMSK-modulated signal for CDPD applications
US5671257A (en) * 1995-06-06 1997-09-23 Sicom, Inc. Symbol timing recovery based on complex sample magnitude
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JP3271504B2 (en) * 1996-02-02 2002-04-02 三菱電機株式会社 Frequency estimation circuit and AFC circuit using the same
KR100476897B1 (en) * 1996-03-26 2005-07-25 텔레폰악티에볼라겟엘엠에릭슨(펍) A method and an arrangement for receiving a symbol sequence
SE515911C2 (en) * 1996-03-26 2001-10-29 Ericsson Telefon Ab L M Method and apparatus for receiving a symbol sequence
US5960048A (en) * 1996-03-26 1999-09-28 Telefonaktiebolaget Lm Ericsson Method and an arrangement for receiving a symbol sequence
US5729577A (en) * 1996-05-21 1998-03-17 Motorola, Inc. Signal processor with improved efficiency
DE19639309B4 (en) * 1996-09-25 2013-12-05 Rohde & Schwarz Gmbh & Co. Kg Method for determining the time position of a synchronization sequence in a received data stream by means of frame synchronization
US5953327A (en) * 1996-10-29 1999-09-14 Stanford Telecommunications, Inc. Class of low cross correlation non-palindromic synchronization sequences for code tracking in synchronous multiple access communication systems
US5909447A (en) * 1996-10-29 1999-06-01 Stanford Telecommunications, Inc. Class of low cross correlation palindromic synchronization sequences for time tracking in synchronous multiple access communication systems
US6049576A (en) * 1996-10-29 2000-04-11 Stanford Telecommunications, Inc. Kronecker product code acquisition system
US6097770A (en) * 1996-10-31 2000-08-01 Lucent Technologies Inc. Frequency offset estimation for wireless systems based on channel impulse response
US5914981A (en) * 1997-02-24 1999-06-22 At&T Wireless Services Inc. Method to indicate synchronization lock of a remote station with a base station for a discrete multitone spread spectrum communications system
US5943375A (en) * 1997-02-06 1999-08-24 At&T Wireless Services Inc. Method to indicate synchronization lock of a remote station with a base station
WO1998035458A1 (en) * 1997-02-06 1998-08-13 At & T Wireless Services, Inc. Method of synchronizing a remote station with a base station in a discrete multitone spread spectrum communications system
IL120210A (en) * 1997-02-13 1999-12-31 Dspc Tech Ltd Synchronization system and method for digital communication systems
US5896425A (en) * 1997-02-24 1999-04-20 At&T Wireless Services Inc Non-uniformly spaced tones for synchronization waveform
US6373899B1 (en) 1997-06-30 2002-04-16 Spacenet, Inc. Combined preamble detection and information method for burst-type digital communication system
US6421399B1 (en) * 1998-03-05 2002-07-16 Agere Systems Guardian Corporation Frequency and phase estimation for MPSK signals
US6115370A (en) * 1998-05-26 2000-09-05 Nera Wireless Broadband Access As Method and system for protocols for providing voice, data, and multimedia services in a wireless local loop system
US6144645A (en) * 1998-05-26 2000-11-07 Nera Wireless Broadband Access As Method and system for an air interface for providing voice, data, and multimedia services in a wireless local loop system
US6131012A (en) * 1998-05-26 2000-10-10 Nera Wireless Broadband Access As Method and system for a micro-channel bank for providing voice, data, and multimedia services in a wireless local loop system
FR2782222B1 (en) * 1998-08-06 2002-05-17 Alsthom Cge Alkatel ESTIMATION OF FREQUENCY OFFSET FOR DEMODULATION OF A PACKET OF MODULATED PHASE SYMBOLS
US6618458B1 (en) * 1999-01-29 2003-09-09 Nec Corporation Method and apparatus for signal receiving synchronization
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
US8861622B2 (en) 1999-02-24 2014-10-14 Sony Deutschland Gmbh Transmitting apparatus and method for a digital telecommunication system
US6308076B1 (en) * 1999-03-23 2001-10-23 Ericsson Inc. Methods and systems for synchronization with multiple frequency offsets and known timing relationships
US6765956B1 (en) * 1999-04-28 2004-07-20 Texas Instruments Incorporated Multiple sampling frame synchronization in a wireline modem
US6608864B1 (en) * 1999-05-26 2003-08-19 3Com Corporation Method and apparatus for fault recovery in a decision feedback equalizer
US6987752B1 (en) * 1999-09-15 2006-01-17 Lucent Technologies Inc. Method and apparatus for frequency offset estimation and interleaver synchronization using periodic signature sequences
US6434129B1 (en) 1999-12-01 2002-08-13 Nera Wireless Broadband Access As Method and system for an air interface for providing voice, data, and multimedia services in a wireless local loop system
US7684465B1 (en) * 2000-01-21 2010-03-23 Texas Instruments Incorporated Frequency hopping communication protocol
US7349381B1 (en) * 2000-04-28 2008-03-25 Rockwell Collins Synchronization technique for spread spectrum frequency hopped data links and radios using the same
DE10024153A1 (en) * 2000-05-19 2001-11-22 Philips Corp Intellectual Pty Wireless network with capacity measurement has controller using channel associated with terminal to send instruction to transmit more data packets when level threshold exceeded
SE517039C2 (en) * 2000-05-31 2002-04-02 Bjoern Ottersten Device and method for channel interference suppression
KR100333818B1 (en) * 2000-08-16 2002-04-26 윤종용 Apparatus for detecting mode by using null symbols in digital audio receiver and method thereof
AU2001285129A1 (en) * 2000-08-21 2002-03-04 Efficient Channel Coding, Inc. Frequency-hopping receiver with clock and carrier recovery
US6799193B2 (en) * 2000-12-15 2004-09-28 Maxim Integrated Products, Inc. Fully digital symbol synchronization technique
US7106787B2 (en) * 2001-11-28 2006-09-12 Broadcom Corporation Acquisition matched filter for W-CDMA systems providing frequency offset robustness
US6912244B2 (en) * 2002-01-31 2005-06-28 Qualcomm Inc. Pilot frequency acquisition based on a window of data samples
US6792037B2 (en) * 2002-02-28 2004-09-14 Interdigital Technology Corporation Apparatus and method of searching for known sequences
US7039004B2 (en) * 2002-10-01 2006-05-02 Atheros Communications, Inc. Decision feedback channel estimation and pilot tracking for OFDM systems
US7756005B2 (en) * 2005-03-11 2010-07-13 Qualcomm Incorporated Coarse timing/frame acquisition of OFDM system using time division multiplexed pilot symbol
US7715505B2 (en) * 2005-07-28 2010-05-11 Itt Manufacturing Enterprises, Inc Adaptive synchronization enhancement technique for serial modulated waveforms
JP4922617B2 (en) * 2006-01-10 2012-04-25 富士通セミコンダクター株式会社 Synchronization determination method and synchronization determination apparatus
US8428152B2 (en) * 2006-12-15 2013-04-23 Amimon Ltd. Device, method and system of uplink communication between wireless video modules
JP4916962B2 (en) * 2007-06-26 2012-04-18 日本電波工業株式会社 Signal processor and radio
JP4655139B2 (en) * 2008-11-19 2011-03-23 トヨタ自動車株式会社 Mobile positioning device
GB2545489A (en) 2015-12-18 2017-06-21 Nordic Semiconductor Asa Radio communication

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US4291409A (en) * 1978-06-20 1981-09-22 The Mitre Corporation Spread spectrum communications method and apparatus
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722230A2 (en) * 1995-01-13 1996-07-17 Sony Corporation TDMA system receiver for intermittently receiving burst data
EP0722230A3 (en) * 1995-01-13 2000-07-12 Sony Corporation TDMA system receiver for intermittently receiving burst data

Also Published As

Publication number Publication date
US5428647A (en) 1995-06-27
CA2103497C (en) 1999-03-09

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Effective date: 20021119