WO2002041518A3 - System and method for compensating for frequency offset - Google Patents

System and method for compensating for frequency offset Download PDF

Info

Publication number
WO2002041518A3
WO2002041518A3 PCT/SE2001/002524 SE0102524W WO0241518A3 WO 2002041518 A3 WO2002041518 A3 WO 2002041518A3 SE 0102524 W SE0102524 W SE 0102524W WO 0241518 A3 WO0241518 A3 WO 0241518A3
Authority
WO
WIPO (PCT)
Prior art keywords
frequency offset
estimate
data signals
data
compensating
Prior art date
Application number
PCT/SE2001/002524
Other languages
French (fr)
Other versions
WO2002041518A2 (en
Inventor
Lars Lindbom
Kamibz Zangi
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to AU2002214506A priority Critical patent/AU2002214506A1/en
Publication of WO2002041518A2 publication Critical patent/WO2002041518A2/en
Publication of WO2002041518A3 publication Critical patent/WO2002041518A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/01—Reducing phase shift
    • 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
    • H04L2027/003—Correction of carrier offset at baseband only
    • 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
    • H04L2027/0038—Correction of carrier offset using an equaliser
    • H04L2027/0042—Correction of carrier offset using an equaliser the equaliser providing the offset correction per se
    • 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
    • H04L2027/0053—Closed loops
    • H04L2027/0055—Closed loops single phase

Abstract

The present invention is directed toward an automatic frequency control system for compensating for frequency offset of received data signals in a radio frequency communication system. A reference sample index for the data to be compensated is first determined as a function of the transmission channel and known training data. A scaled phase error estimate is calculated along with a time-varying filter parameter. From the scaled phase error estimate and the filter parameter, a frequency offset estimate and a phase drift estimate are calculated. The system proceeds through the time-indexed, received data signals until the entire received batch of data signals has been processed, and the corresponding compensated soft data has been output.
PCT/SE2001/002524 2000-11-15 2001-11-13 System and method for compensating for frequency offset WO2002041518A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002214506A AU2002214506A1 (en) 2000-11-15 2001-11-13 System and method for compensating for frequency offset

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/711,910 US6798853B1 (en) 2000-11-15 2000-11-15 System and method for compensating for frequency offset
US09/711,910 2000-11-15

Publications (2)

Publication Number Publication Date
WO2002041518A2 WO2002041518A2 (en) 2002-05-23
WO2002041518A3 true WO2002041518A3 (en) 2002-07-25

Family

ID=24859999

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/002524 WO2002041518A2 (en) 2000-11-15 2001-11-13 System and method for compensating for frequency offset

Country Status (3)

Country Link
US (1) US6798853B1 (en)
AU (1) AU2002214506A1 (en)
WO (1) WO2002041518A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7123670B2 (en) * 2001-09-24 2006-10-17 Atheros Communications, Inc. Fine frequency offset estimation and calculation and use to improve communication system performance
CN100438518C (en) * 2002-05-13 2008-11-26 义隆电子股份有限公司 Radio communication coding and decoding method using variable length signal to express digital data
WO2005099093A1 (en) * 2004-03-30 2005-10-20 Itron, Inc. Frequency shift compensation, such as for use in a wireless meter reading environment
US7822069B2 (en) * 2006-05-22 2010-10-26 Qualcomm Incorporated Phase correction for OFDM and MIMO transmissions
US8155600B2 (en) * 2007-12-03 2012-04-10 Texas Instruments Incorporated Digital communication using an inexpensive reference crystal
US8160503B2 (en) * 2009-02-27 2012-04-17 Research In Motion Limited Method and system for characterizing a radio channel of a wireless network using variability of synchronization
TWI440340B (en) * 2009-12-04 2014-06-01 Mstar Semiconductor Inc Signal processing system and method thereof
US8958506B2 (en) 2013-02-25 2015-02-17 Itron, Inc. FSK/MSK decoder
US9077487B2 (en) 2013-02-25 2015-07-07 Itron, Inc. Radio to support channel plans of arbitrary width and/or spacing
US9252998B2 (en) * 2013-02-25 2016-02-02 Itron, Inc. Radio to detect and compensate for frequency misalignment
US9426680B2 (en) 2013-02-25 2016-08-23 Itron, Inc. Real-time radio spectrum assessment engine
US9014307B2 (en) 2013-02-25 2015-04-21 Itron, Inc. Radio to analog-to-digital sample rate decoupled from digital subsystem
US9992124B2 (en) 2015-10-09 2018-06-05 Itron, Inc. Multi-channel decoder architecture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536687A2 (en) * 1991-10-07 1993-04-14 Nippon Telegraph And Telephone Corporation Method and apparatus for demodulation with adaptive phase control in quasicoherent detection
US5732111A (en) * 1995-12-06 1998-03-24 Rockwell International Corporation Frequency error compensation for direct sequence spread spectrum systems
EP1063826A1 (en) * 1999-06-25 2000-12-27 Sony International (Europe) GmbH Carrier recovery means in digital quadrature receivers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5233633A (en) * 1991-06-28 1993-08-03 Motorola, Inc. Automatic frequency control by an adaptive filter
US5909470A (en) * 1996-10-11 1999-06-01 Arraycomm, Inc. Method and apparatus for decision directed demodulation using antenna arrays and spatial processing
US6202075B1 (en) * 1998-12-07 2001-03-13 Lucent Technologies, Inc. Second order LMS tap update algorithm with high tracking capability

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536687A2 (en) * 1991-10-07 1993-04-14 Nippon Telegraph And Telephone Corporation Method and apparatus for demodulation with adaptive phase control in quasicoherent detection
US5732111A (en) * 1995-12-06 1998-03-24 Rockwell International Corporation Frequency error compensation for direct sequence spread spectrum systems
EP1063826A1 (en) * 1999-06-25 2000-12-27 Sony International (Europe) GmbH Carrier recovery means in digital quadrature receivers

Also Published As

Publication number Publication date
WO2002041518A2 (en) 2002-05-23
AU2002214506A1 (en) 2002-05-27
US6798853B1 (en) 2004-09-28

Similar Documents

Publication Publication Date Title
WO2002041518A3 (en) System and method for compensating for frequency offset
WO2001056239A3 (en) Clock synchronization, frequency synchronization, channel sounder and equalizer for ofdm using pilots equidistant in the frequency domain
AU2001262857A1 (en) A receiver
WO2005101839A3 (en) Shifted channel characteristics for mitigating co-channel interference
WO2002101341A3 (en) Receiver having integrated spectral analysis capability
WO2004095718A3 (en) Automatic frequency control processing in multi-channel receivers
EP1233508A3 (en) Intermediate frequency planning in radio transmitters and receivers
EP0622910A3 (en) Time diversity transmission system for the reduction of adjacent channel interference in mobile telephone systems
WO2002015502A3 (en) Adaptive linear equalisation for walsh-modulated
DE60043778D1 (en) METHOD FOR DETERMINING RADIO SIGNAL CHANGE AND USE THIS INFORMATION FOR IMPROVEMENTING SIGNALS
AU6743596A (en) Receiving method and receiver
EP0529421A3 (en) Method and apparatus for measuring carrier frequency offset in a multichannel communications system
WO1997023962A3 (en) Method and apparatus for intersymbol interference reduction using array processing of diversity signals
AU2003240165A1 (en) Improving the performance of a receiver in interfering conditions
EP0996261A3 (en) Method and system for rapid synchronization of a point to multipoint communication system
EP0991134A3 (en) Antenna alignment system
WO2004100589A3 (en) Data transmission method
ATE288599T1 (en) METHOD AND SYSTEM FOR AUTOMATIC DELAY DETECTION AND RECEIVER ADJUSTMENT FOR A SYNCHRONOUS BUS INTERFACE
EP1113633A3 (en) Apparatus and method for channel estimation in a radio communication system
AU2003240168A1 (en) Reception of signals in a device comprising a transmitter
AU2002235904A1 (en) Doppler shift and spread estimation method and apparatus
AU4137500A (en) Method for controlling transmission power
TW355892B (en) An apparatus and a method for a telecommunication system
WO2001076263A3 (en) Adjustment of power control rate in a radio communication system
WO2001028150A3 (en) Method and apparatus for eliminating the effects of frequency offsets in a digital communication system

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP