WO2002027956A3 - Method and system for estimating frequency offset and phase rotation correction in cdma systems - Google Patents

Method and system for estimating frequency offset and phase rotation correction in cdma systems Download PDF

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Publication number
WO2002027956A3
WO2002027956A3 PCT/CA2001/001247 CA0101247W WO0227956A3 WO 2002027956 A3 WO2002027956 A3 WO 2002027956A3 CA 0101247 W CA0101247 W CA 0101247W WO 0227956 A3 WO0227956 A3 WO 0227956A3
Authority
WO
WIPO (PCT)
Prior art keywords
frequency offset
correlation
phase rotation
function
rotation correction
Prior art date
Application number
PCT/CA2001/001247
Other languages
French (fr)
Other versions
WO2002027956A2 (en
Inventor
Xixian Chen
Xin Jin
Mohamed El-Tarhuni
Runbo Fu
Jeffrey Stanier
Neil Mcgowan
Wen Zhao
Original Assignee
Nortel Networks Ltd
Xixian Chen
Xin Jin
Mohamed El-Tarhuni
Runbo Fu
Jeffrey Stanier
Neil Mcgowan
Wen Zhao
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 Nortel Networks Ltd, Xixian Chen, Xin Jin, Mohamed El-Tarhuni, Runbo Fu, Jeffrey Stanier, Neil Mcgowan, Wen Zhao filed Critical Nortel Networks Ltd
Priority to EP01966908A priority Critical patent/EP1325564A2/en
Priority to AU2001287452A priority patent/AU2001287452A1/en
Publication of WO2002027956A2 publication Critical patent/WO2002027956A2/en
Publication of WO2002027956A3 publication Critical patent/WO2002027956A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7087—Carrier synchronisation aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop

Landscapes

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

Abstract

Methods and apparatus which estimate frequency offset estimation and correction in manner which is suitable in environments which may involve high speeds are provided. The invention provides a frequency offset correction apparatus/method adapted to estimate a frequency offset correction from a despread finger output sequence. The apparatus has a correlation function adapted to perform a correlation between an input sequence which is a function of the despread finger output sequence and a delayed version of the input sequence over an update period to produce a correlation output. Also, the apparatus has an instantaneous frequency offset determining function adapted to determine an instantaneous frequency offset as a function of the correlation output. _
PCT/CA2001/001247 2000-09-28 2001-09-07 Method and system for estimating frequency offset and phase rotation correction in cdma systems WO2002027956A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01966908A EP1325564A2 (en) 2000-09-28 2001-09-07 Method and system for estimating frequency offset and phase rotation correction in cdma systems
AU2001287452A AU2001287452A1 (en) 2000-09-28 2001-09-07 Method and system for estimating frequency offset and phase rotation correction in cdma systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67125400A 2000-09-28 2000-09-28
US09/671,254 2000-09-28

Publications (2)

Publication Number Publication Date
WO2002027956A2 WO2002027956A2 (en) 2002-04-04
WO2002027956A3 true WO2002027956A3 (en) 2002-10-03

Family

ID=24693747

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/001247 WO2002027956A2 (en) 2000-09-28 2001-09-07 Method and system for estimating frequency offset and phase rotation correction in cdma systems

Country Status (3)

Country Link
EP (1) EP1325564A2 (en)
AU (1) AU2001287452A1 (en)
WO (1) WO2002027956A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8331492B2 (en) * 2002-07-04 2012-12-11 Intel Mobile Communications GmbH Device and method for determining the deviation of the carrier frequency of a mobile radio device from the carrier frequency of a base station
US8457178B2 (en) 2007-03-26 2013-06-04 Qualcomm Incorporated Frequency offset estimator
CN111935050B (en) * 2020-06-17 2022-07-05 中国船舶重工集团公司第七一五研究所 Single carrier frequency domain equalization underwater acoustic communication system residual phase offset correction method based on phase search

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361276A (en) * 1993-09-13 1994-11-01 At&T Bell Laboratories All digital maximum likelihood based spread spectrum receiver
US5659573A (en) * 1994-10-04 1997-08-19 Motorola, Inc. Method and apparatus for coherent reception in a spread-spectrum receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361276A (en) * 1993-09-13 1994-11-01 At&T Bell Laboratories All digital maximum likelihood based spread spectrum receiver
US5659573A (en) * 1994-10-04 1997-08-19 Motorola, Inc. Method and apparatus for coherent reception in a spread-spectrum receiver

Also Published As

Publication number Publication date
AU2001287452A1 (en) 2002-04-08
EP1325564A2 (en) 2003-07-09
WO2002027956A2 (en) 2002-04-04

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