公开(公告)号：CA961117A

公开(公告)日：1975-01-14

申请号：CA130470

申请日：1971-12-20

Applicant: IBM

Inventor： SHA RICHARD T ,  TANG DONALD T

IPC: H04L25/03

Abstract: An automatic equalizer with extremely fast convergence is disclosed. The weight setting procedure or algorithm is basically an iterative operation which can be conveniently expressed by cascaded equalizers. One form of the apparatus utilized consists of a plurality of equalizer stages which have their tap settings changed after successive iterations (the first iteration adjusts the first equalizer stage, the second iteration adjusts the second equalizer stage and so on) such that after n iterations a given initial distortion D is reduced to at most D2 . The algorithm involved and the method of operating the equalizer is also disclosed.