公开(公告)号：CA2158014A1

公开(公告)日：1994-12-22

申请号：CA2158014

申请日：1993-06-14

Applicant: IBM

Inventor： CHEVILLAT PIERRE ,  ELEFTHERIOU EVANGELOS ,  MAIWALD DIETRICH

IPC: G11B20/14 ,  G11B5/09 ,  G11B20/10 ,  H04L25/03 ,  H04L25/497

Abstract: The present application makes use of a novel adaptive noise-predictive parti al-response equalization scheme for channels (30) exhibiting spectral nulls and/or near nulls. The noise-predictive partial re sponse (PR) equalizer employed in the different embodime nts of the present invention consists of a linear PR equalizer (32) which shapes the channel response to a predetermined partial-respons e function, followed by a linear predictor. This scheme modifies the output se quence of said linear partial-response equalizer (32) by whitening the total distortion, i.e. by whitening the noise components and t he residual interference components at said linear PR eq ualizer output, thereby achieving the best possible signal-to-noise ratio (SNR) befo re detection.