Patent Number: 6,298,464

Title: Method and apparatus for maximum likelihood sequence detection

Abstract: In a Viterbi decoder, a branch metrics unit (51) receives samples and provides a branch metric to a first and second adder (54 and 55) that adds the branch metric to a first and second path metric from a path metrics memory (52). Concurrently, a comparator (56) compares the first and second path metrics and provides a select signal to a multiplexor (58) to select the output of the first or second adder (54 or 55). The selection signal is also provided to a path memory unit (33) which provides a detected symbol sequence. The output of the first or second adder (54 or 55) is selected by the multiplexor (58) and provided to the path metric memory (52) as an updated path metric.

Inventors: Tong; Mui-Chwee (Singapore, SG), Weiner; Nicholas (Bristol, GB)

Assignee: Motorola Inc.

International Classification: H03M 13/00 (20060101); H03M 13/41 (20060101); H03M 013/41 ()

Expiration Date: 10/02/2018