Discrete fourier transform equalizer and method

Details Discrete fourier transform equalizer and method Discrete fourier transform equalizer and method

Category

H - Electricity

Subcategory

04

Subsubcategory

B

CPC

354/138, 328/0.1

IPC codes

H04B 3/06 (2006.01) H04L 25/03 (2006.01)

Type

Patent

Patent number

CA 1101078

Description

ABSTRACT DISCRETE FOURIER TRANSFORM EQUALIZER AND METHOD A method of determining the initial values of the co- efficients of a transversal equalizer which includes the steps of: transmitting a periodic sequence such as a pseudo-random sequence over a transmission channel; modulating the received signal by means of a time-domain window whose Fourier transform exhibits a relatively flat central peak and has a low value in the vicinity of those frequencies which are multiples of the inverse of the period of the transmitted sequence, which low value may result, for example, from the existence of double zeros in the Fourier transform; calculating the discrete Fourier transform Wk of the signal so modulated; calculating the ratio Fk= Image where Zk is the discrete Fourier trans- form of the transmitted sequence; and calculating the inverse discrete Fourier transform of Fk, thereby deter- mining the value of the coefficients cn of the equalizer.

Application Number

282305

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