公开(公告)号：JPH11234144A

公开(公告)日：1999-08-27

申请号：JP21189098

申请日：1998-07-09

Applicant: MOTOROLA INC

Inventor： THEODORE A TROST ,  TERRY M SCHAFFNER

IPC: H03M13/23 ,  H03K9/00 ,  H03M13/27 ,  H03M13/12 ,  H03M13/22

Abstract: PROBLEM TO BE SOLVED: To efficiently generate a re-encoding history data bit by convolution- encoding each data bit of a data clock to a branch word for transmission, fixing the required number of re-encoding history data bits based on the position of the decoded branch word and selecting the combination of the data bits for a previously decoded data bit sequence. SOLUTION: A most likely decoder 100 receives and decodes a matrix 102 interleaved with plural branch words. Each time of decoding one of the branch words, a composite data but is shifted into a sequence to generate a history data bit sequence as data 107. A re-encoding history data bit generator 101 selects the combination of data bits at a prescribed position within the history data bit sequence with respect to the position of a decoded data but finally shifted into the sequence, re-encodes the selected combination and outputs it as the re-encoding history data bit.