Document Type and Number:
Japanese Patent JPS6244448
Kind Code:
B2
Abstract:
A method of and apparatus for determining during an initial training period the initial values of the coefficients of a transversal equalizer in a data transmission system in which the transmission channel creates frequency shift. The received periodic training sequence is modulated by a time-domain window signal whose Fourier transform exhibits a relatively flat central peak and has comparatively low values in the vicinity of those frequencies which are a multiple of the inverse of the period of the transmitted sequence, and the discrete Fourier transform Wk of the modulated signal is computed. The values of the coefficients of the equalizer are obtained by computing the inverse discrete Fourier transform of the ratio Fk=Zk/Wk, where Zk is the discrete Fourier transform of the transmitted sequence.
Inventors:
MISHERU CHOOKE
Application Number:
JP7564577A
Publication Date:
September 21, 1987
Filing Date:
June 27, 1977
Export Citation:
Assignee:
INTAANASHONARU BIJINESU MASHIINZU CORP
International Classes:
H03H15/00; H03H19/00; H04B3/06; H04B3/10; H04L25/03