Viterbi decoder

Details Viterbi decoder Viterbi decoder

1997-03-11

1999-03-09

Nguyen, Hoa T.

Excavating

G06F 1110

Patent

active

058810757

ABSTRACT:
A Viterbi decoder which operates a plurality of states at one time to thereby decode a plurality of channels at an increased speed. The decoder includes a branch metric calculating unit which receives convolutional data and calculates a plurality of branch metrics. A branch metric allocating unit allocates the plurality of branch metrics as even and odd branch metrics. A state metric storing unit stores a current state metric and allocates a plurality of state metrics as even and odd state metrics. First and second add-compare-select (ACS) units perform addition, comparison, and selection on the even branch and state metrics, and select paths having optimum distances. Third and fourth ACS units perform addition, comparison, and selection on the odd branch and state metrics, and select paths having optimum distances. A path tracing logic unit traces the path selection information selected in the first through fourth ACS units, and outputs decoded data. A path storing unit stores a path selection signal generated and selected in the path selection information controller.

REFERENCES:
patent: 5027374 (1991-06-01), Rossman
patent: 5408502 (1995-04-01), How
patent: 5414738 (1995-05-01), Bienz
patent: 5432803 (1995-07-01), Liu et al.

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