SE9001888D0 - PROCEDURES FOR DETERMINING THE BEGINNING VALUE FOR COEFFICIENTS FOR A TRANSFER EQUALIZER - Google Patents

PROCEDURES FOR DETERMINING THE BEGINNING VALUE FOR COEFFICIENTS FOR A TRANSFER EQUALIZER

Info

Publication number
SE9001888D0
SE9001888D0 SE9001888A SE9001888A SE9001888D0 SE 9001888 D0 SE9001888 D0 SE 9001888D0 SE 9001888 A SE9001888 A SE 9001888A SE 9001888 A SE9001888 A SE 9001888A SE 9001888 D0 SE9001888 D0 SE 9001888D0
Authority
SE
Sweden
Prior art keywords
equalizer
fourier transform
discrete fourier
coefficients
determining
Prior art date
Application number
SE9001888A
Other languages
Swedish (sv)
Other versions
SE9001888L (en
SE512594C2 (en
Inventor
K Oestman
Original Assignee
Nokia Data Systems
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 Nokia Data Systems filed Critical Nokia Data Systems
Publication of SE9001888D0 publication Critical patent/SE9001888D0/en
Publication of SE9001888L publication Critical patent/SE9001888L/en
Publication of SE512594C2 publication Critical patent/SE512594C2/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
    • H04L25/03044—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure using fractionally spaced delay lines or combinations of fractionally integrally spaced taps

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The invention relates to a method of determining the coefficients of a transversal equalizer used in the receiver of a data communication system by sending a known periodic data sequence (training sequence) over the communication channel, by calculating the discrete Fourier transform C(k) of the equalizer by means of the received data sequence either directly or through the discrete Fourier transform U(k) of the channel, and by calculating the coefficients of the equalizer by an inverse discrete Fourier transform from said discrete Fourier transform C(k) of the equalizer. In order that the coefficients could be calculated by means of a shorter training sequence, the method is characterized in that the number of the spectral components of the discrete Fourier transform of the equalizer or the channel is increased by interpolating intermediate components between the original spectral components before said calculation of the inverse discrete Fourier transform. <IMAGE>
SE9001888A 1989-05-29 1990-05-25 Method for determining initial values of coefficients for a transverse equalizer SE512594C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI892604A FI82337C (en) 1989-05-29 1989-05-29 Procedure for determining basic values for a transverse coefficient of coefficients

Publications (3)

Publication Number Publication Date
SE9001888D0 true SE9001888D0 (en) 1990-05-25
SE9001888L SE9001888L (en) 1990-11-30
SE512594C2 SE512594C2 (en) 2000-04-10

Family

ID=8528527

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9001888A SE512594C2 (en) 1989-05-29 1990-05-25 Method for determining initial values of coefficients for a transverse equalizer

Country Status (5)

Country Link
DE (1) DE4016947C2 (en)
FI (1) FI82337C (en)
FR (1) FR2647609B1 (en)
GB (1) GB2233863B (en)
SE (1) SE512594C2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320866A (en) * 1996-12-30 1998-07-01 Daewoo Electronics Co Ltd An equalization arrangement in which initial values which determine tap coefficients are adaptively chosen
DE19802193A1 (en) * 1998-01-22 1999-07-29 Daimler Benz Aerospace Ag Signal frequency estimation method for target range measurement in radar system
US7792184B2 (en) * 2003-04-24 2010-09-07 Qualcomm Incorporated Apparatus and method for determining coefficient of an equalizer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2337465A1 (en) * 1975-12-30 1977-07-29 Ibm France METHOD AND DEVICE FOR DETERMINING THE INITIAL VALUES OF THE COEFFICIENTS OF A COMPLEX TRANSVERSAL EQUALIZER
FR2358061A1 (en) * 1976-07-08 1978-02-03 Ibm France EQUALIZATION METHOD AND DEVICE USING THE FOURIER TRANSFORM

Also Published As

Publication number Publication date
GB2233863A (en) 1991-01-16
SE9001888L (en) 1990-11-30
GB2233863B (en) 1993-12-22
FI82337B (en) 1990-10-31
FR2647609A1 (en) 1990-11-30
DE4016947A1 (en) 1990-12-06
DE4016947C2 (en) 2002-08-01
SE512594C2 (en) 2000-04-10
FR2647609B1 (en) 1992-10-30
FI82337C (en) 1991-02-11
FI892604A0 (en) 1989-05-29
GB9011829D0 (en) 1990-07-18

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