SE9404356L - Method of OFDM reception for correction of frequency, time window, sampling clock and slow phase variations - Google Patents

Method of OFDM reception for correction of frequency, time window, sampling clock and slow phase variations

Info

Publication number
SE9404356L
SE9404356L SE9404356A SE9404356A SE9404356L SE 9404356 L SE9404356 L SE 9404356L SE 9404356 A SE9404356 A SE 9404356A SE 9404356 A SE9404356 A SE 9404356A SE 9404356 L SE9404356 L SE 9404356L
Authority
SE
Sweden
Prior art keywords
correction
frequency
time window
sampling clock
phase error
Prior art date
Application number
SE9404356A
Other languages
Swedish (sv)
Other versions
SE9404356D0 (en
SE504787C2 (en
Inventor
Staffan Nystroem
Erik Stare
Maarten Rignell
Goeran Roth
Brian Loennroth
Vidar Ringset
Original Assignee
Hd Divine Ab
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 Hd Divine Ab filed Critical Hd Divine Ab
Priority to SE9404356A priority Critical patent/SE504787C2/en
Publication of SE9404356D0 publication Critical patent/SE9404356D0/en
Priority to CN95196802A priority patent/CN1170486A/en
Priority to AU42751/96A priority patent/AU4275196A/en
Priority to KR1019970703823A priority patent/KR980700750A/en
Priority to PCT/SE1995/001413 priority patent/WO1996019056A1/en
Priority to JP8518667A priority patent/JPH10510958A/en
Publication of SE9404356L publication Critical patent/SE9404356L/en
Publication of SE504787C2 publication Critical patent/SE504787C2/en

Links

Classifications

    • 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
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • 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
    • H04L27/2657—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
    • H04L27/2668—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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Television Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The present invention relates to a method for correction of frequency, time window error, sampling clock and phase error at OFDM-receivers. The information which is transmitted in a signal which includes several carriers in digital form, includes consecutive frames comprising a number of symbols. In respective frames at least one up-chirp and one down-chirp is arranged. Correction of the frequency is made based on analysis of the up- and down-chirps. Further the main focus of the weighted impulse response is determined. The position of the main focus is used for correction of the time window and the sampling clock. Further the vectors from the location of the received carriers are registred in relation to their ideal location in a matrix. The angles between the received vector and the ideally located vector are determined and are weighed together with regard to the amplitude of the transmission function at the frequency of the carrier and the distance of the vector to the origin of coordinates. An average is after that made of the weighed angle distances. The obtained average is used for correction of the phase error. Further, the knowledge of the obtained phase error and previous phase errors is used for estimation of the coming phase error in the following reception.
SE9404356A 1994-12-14 1994-12-14 Method of OFDM reception for correction of frequency, time window, sampling clock and slow phase variations SE504787C2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE9404356A SE504787C2 (en) 1994-12-14 1994-12-14 Method of OFDM reception for correction of frequency, time window, sampling clock and slow phase variations
CN95196802A CN1170486A (en) 1994-12-14 1995-11-27 Method at OFDM-reception for correction of frequency, time window, sampling clock, and slow phase variation
AU42751/96A AU4275196A (en) 1994-12-14 1995-11-27 Method at ofdm-reception for correction of frequency, time window, sampling clock and slow phase variations
KR1019970703823A KR980700750A (en) 1994-12-14 1995-11-27 OFDM-RECEPTION FOR CORRECTION OF FREQUENCY, TIME WINDOW, SAMPLING CLOCK AND SLOW PHASE VARIATIONS
PCT/SE1995/001413 WO1996019056A1 (en) 1994-12-14 1995-11-27 Method at ofdm-reception for correction of frequency, time window, sampling clock and slow phase variations
JP8518667A JPH10510958A (en) 1994-12-14 1995-11-27 Method for correcting frequency, time window, sampling clock and gradual phase fluctuation in OFDM reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9404356A SE504787C2 (en) 1994-12-14 1994-12-14 Method of OFDM reception for correction of frequency, time window, sampling clock and slow phase variations

Publications (3)

Publication Number Publication Date
SE9404356D0 SE9404356D0 (en) 1994-12-14
SE9404356L true SE9404356L (en) 1996-06-15
SE504787C2 SE504787C2 (en) 1997-04-28

Family

ID=20396337

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9404356A SE504787C2 (en) 1994-12-14 1994-12-14 Method of OFDM reception for correction of frequency, time window, sampling clock and slow phase variations

Country Status (6)

Country Link
JP (1) JPH10510958A (en)
KR (1) KR980700750A (en)
CN (1) CN1170486A (en)
AU (1) AU4275196A (en)
SE (1) SE504787C2 (en)
WO (1) WO1996019056A1 (en)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997007620A1 (en) * 1995-08-16 1997-02-27 Philips Electronics N.V. Transmission system with improved symbol processing
US5885470A (en) * 1997-04-14 1999-03-23 Caliper Technologies Corporation Controlled fluid transport in microfabricated polymeric substrates
GB9614712D0 (en) * 1996-07-12 1996-09-04 Roke Manor Research Improvements in or relating to radio receivers
FI102231B (en) * 1996-09-16 1998-10-30 Nokia Technology Gmbh Method for adjusting symbol synchronization and sampling rate in a device receiving OFDM modulated transmissions and a device implementing the method
JP3479418B2 (en) * 1996-10-18 2003-12-15 アルパイン株式会社 Receiver for digital audio broadcasting
EP0859494A3 (en) * 1997-02-17 2000-08-23 Matsushita Electric Industrial Co., Ltd. Synchronisation of the local oscillator in multicarrier systems
EP1933516A3 (en) * 1997-05-02 2009-03-04 LSI Logic Corporation Demodulating video broadcast signals
FR2765058B1 (en) * 1997-06-24 2000-09-01 Thomson Csf METHOD AND DEVICE FOR FREQUENTIAL CORRECTION IN VARIABLE CARRIER FREQUENCY MODULATION AND SEVERAL SUB-CARRIERS
US6104767A (en) * 1997-11-17 2000-08-15 Telefonaktiebolaget Lm Ericsson Method and apparatus for estimating a frequency offset
DE69819673T2 (en) * 1998-01-19 2004-09-30 Victor Company of Japan, Ltd., Yokohama Arrangement for symbol synchronization in an OFDM transmission system using the properties of a communication channel
JP2933080B1 (en) * 1998-04-24 1999-08-09 日本電気株式会社 Reception synchronizer using chirp signal
US6396866B1 (en) * 1998-05-01 2002-05-28 Trw Inc. Symmetric chirp communications acquisition method and apparatus
US6370397B1 (en) * 1998-05-01 2002-04-09 Telefonaktiebolaget Lm Ericsson (Publ) Search window delay tracking in code division multiple access communication systems
US6731622B1 (en) 1998-05-01 2004-05-04 Telefonaktiebolaget Lm Ericsson (Publ) Multipath propagation delay determining means using periodically inserted pilot symbols
US6304619B1 (en) * 1998-07-01 2001-10-16 Zenith Electronics Corporation Receiver synchronizer
US6418158B1 (en) 1998-11-24 2002-07-09 Hughes Electronics Corporation Synchronization in mobile satellite systems using dual-chirp waveform
WO2000031898A1 (en) * 1998-11-24 2000-06-02 Hughes Electronics Corporation Acquisition mechanism for a mobile satellite system
US7245930B1 (en) 1998-11-24 2007-07-17 Hughes Network Systems, Llc Acquisition mechanism for a mobile satellite system
JP3335933B2 (en) * 1998-11-30 2002-10-21 株式会社東芝 OFDM demodulator
EP1011234A1 (en) * 1998-12-18 2000-06-21 Sony International (Europe) GmbH Synchronisation of a RF receiver using chirp signals with a passive correlator
JP2000253428A (en) * 1999-03-03 2000-09-14 Hitachi Ltd Receiver and reception method
EP1039713B1 (en) * 1999-03-26 2006-05-31 Nec Corporation Reduction of delay in multicarrier receivers
EP1041790B1 (en) 1999-03-30 2004-11-24 Nec Corporation Symbol timing recovery for OFDM demodulator
DE60029687T2 (en) 1999-06-22 2007-10-18 Matsushita Electric Industrial Co., Ltd., Kadoma Symbol clock synchronization in multi-carrier receivers
US6628697B1 (en) * 1999-10-21 2003-09-30 Cisco Technology, Inc. Subscriber unit ranging in a point to multipoint system
JP3773388B2 (en) * 2000-03-15 2006-05-10 三菱電機株式会社 Clock signal regeneration circuit and clock signal regeneration method
US7177343B1 (en) * 2000-05-17 2007-02-13 Zenith Electronics Corporation Compound chirp and synchronizer for using same
US6954644B2 (en) 2000-12-04 2005-10-11 Telefonaktiebolaget Lm Ericsson (Publ) Using geographical coordinates to determine mobile station time position for synchronization during diversity handover
US6980803B2 (en) 2000-12-04 2005-12-27 Telefonaktiebolaget Lm Ericsson (Publ) Using statistically ascertained position for starting synchronization searcher during diversity handover
US6907245B2 (en) 2000-12-04 2005-06-14 Telefonaktiebolaget Lm Ericsson (Publ) Dynamic offset threshold for diversity handover in telecommunications system
US6799193B2 (en) * 2000-12-15 2004-09-28 Maxim Integrated Products, Inc. Fully digital symbol synchronization technique
US6778622B2 (en) * 2000-12-18 2004-08-17 Schlumberger Technology Corporation Estimating timing error in samples of a discrete multitone modulated signal
US7142502B2 (en) * 2001-08-30 2006-11-28 Intel Corporation Technique for continuous OFDM demodulation
WO2005041514A1 (en) * 2003-10-18 2005-05-06 Technische Universität Dresden Method for synchronisation on transmission of ofdm signals
JP4445839B2 (en) * 2004-11-18 2010-04-07 パイオニア株式会社 OFDM signal receiver and reception method
FR2894097B1 (en) 2005-11-25 2008-01-11 Thales Sa MODEM AND METHOD FOR TRANSMITTING DATA IN A MEDIUM PARTICULARLY SUCH AS AIR AND WATER
FR2924884B1 (en) * 2007-12-11 2009-12-04 Eads Secure Networks REDUCTION OF INTERFERENCES IN AN ORTHOGONAL FREQUENCY-DISTRIBUTED SIGNAL
TW201145918A (en) 2009-12-27 2011-12-16 Maxlinear Inc Methods and apparatus for synchronization in multiple-channel communication systems
EP2429101A1 (en) * 2010-09-08 2012-03-14 University College Cork-National University of Ireland, Cork Multi-carrier system and method for use in an optical network
CN102970034B (en) * 2012-12-05 2014-11-05 天津光电通信技术有限公司 High precision local oscillation output method used for short-wave receiver radio frequency module
CN105007136A (en) * 2014-04-23 2015-10-28 中兴通讯股份有限公司 Method and device for measuring wireless channel response of TD-LTE system
EP3002884B1 (en) * 2014-09-30 2018-04-18 Semtech Corporation Wireless communication method
JP6580289B2 (en) * 2017-05-12 2019-09-25 三菱電機株式会社 Wireless communication device
DE102017220828A1 (en) * 2017-11-22 2019-05-23 Robert Bosch Gmbh Method and system for suppressing an interference signal in the detection of a chirp signal
CN115333160A (en) * 2022-09-13 2022-11-11 国网福建省电力有限公司 Microgrid robust frequency control method based on wind turbine generator and electric automobile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9020170D0 (en) * 1990-09-14 1990-10-24 Indep Broadcasting Authority Orthogonal frequency division multiplexing
DE4128713A1 (en) * 1991-08-29 1993-03-04 Daimler Benz Ag METHOD AND ARRANGEMENT FOR MEASURING THE CARRIER FREQUENCY STORAGE IN A MULTI-CHANNEL TRANSMISSION SYSTEM
DE4310031C2 (en) * 1993-03-27 1997-07-17 Grundig Emv Method for correcting the phase and amplitude of a broadband received signal using reference signals

Also Published As

Publication number Publication date
SE9404356D0 (en) 1994-12-14
JPH10510958A (en) 1998-10-20
SE504787C2 (en) 1997-04-28
WO1996019056A1 (en) 1996-06-20
KR980700750A (en) 1998-03-30
AU4275196A (en) 1996-07-03
CN1170486A (en) 1998-01-14

Similar Documents

Publication Publication Date Title
SE9404356D0 (en) Method of OFDM reception for correction of frequency, time window, sampling clock and slow phase variations
SU514581A3 (en) Method for correcting phase jitter
CN1097928C (en) Transmission system with improved symbol processing
US4030033A (en) Method and apparatus for transmitting messages to and from remote locations
US4559606A (en) Arrangement to provide an accurate time-of-arrival indication for a received signal
FR2428946A1 (en) METHOD AND DEVICE FOR INITIALIZING AN ADAPTIVE EQUALIZER FROM AN UNKNOWN DATA SIGNAL IN A TRANSMISSION SYSTEM USING QUADRATURE AMPLITUDE MODULATION
EP1751580A1 (en) High precision surveillance system by means of multilateration of secondary surveillance radar (ssr) signals
EA199800064A1 (en) METHOD AND DEVICE FOR DETERMINING A SIGNAL LEVEL IN A COMMUNICATION SYSTEM WITH AN EXTENDED SPECTRUM WITH A VARIABLE DATA SPEED
KR970025649A (en) Method and apparatus for implementing antenna diversity for direct sequence spread spectrum receiver
CN101490660A (en) Improved precision CORDIC processor
US3750178A (en) Radio location detection system
ATE78641T1 (en) ECHO COMPENSATION.
KR870010712A (en) Device for regenerating channel clock information and data recovery device having same
SE0101174L (en) Method and signal transmitters for noise modulated remote measurement and group antenna systems including signal transmitters
JPS61198079A (en) Device for detecting amplitude of discontinuous phase introduced to reception signal at some moment
US4559607A (en) Arrangement to provide an accurate time-of-arrival indication for a plurality of received signals
US4325068A (en) Loran-C signal processor
KR970004386A (en) Spread Spectrum Communication System for Error Compensation of Carrier Frequency
CN102353967B (en) Apparatus, methods and computer program products for signal acquisition using common demodulation templates
CN108594277A (en) A kind of phase difference determines method, apparatus, electronic equipment and storage medium
CN101133573A (en) Mobile wireless communication apparatus, and channel estimation value calculating method
US20150204982A1 (en) Fast fix using perfect reference in a satellite-based positioning system
US4138680A (en) Selective sampling method
CN1474196A (en) High precision anti-multipath narrow band correlated distance detecting system in radio positioning
FR2375773A1 (en) ADAPTIVE PHASE DETECTION METHOD AND DEVICE

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 9404356-9

Format of ref document f/p: F