Viterbi decoder with the pipeline processing function

Details Viterbi decoder with the pipeline processing function Viterbi decoder with the pipeline processing function

H - Electricity

03

M

354/68

H03M 3/04 (2006.01) H03M 7/36 (2006.01) H03M 13/41 (2006.01)

Patent

CA 1248236

VITERBI DECODER WITH THE PIPELINE PROCESSING FUNCTION ABSTRACT OF THE DISCLOSURE A Viterbi decoder with a pipeline processing function for decoding a received code sequence trans- ferred from an encoder, including: correlation deter- mining circuit for calculating correlation between a received code sequence and each of a plurality of pre- determined code sequences of known allowable transitions; and selecting circuits operatively receiving the cor- relations for selecting one of the predetermined code sequences as the maximum likelihood transition. The selected one of the predetermined code sequences has the maximum correlation among the correlations. A decoded code sequence is obtained from the selected one of the predetermined code sequences. The correlation deter- mining circuit includes: a plurality of new correlation determining circuits each for determining a new correl- ation based on newly received code sequence and an already calculated correlation between the already received code sequence and one of the predetermined code sequences; and comparing circuit for comparing, simul- taneously with the determination of the new correlations, already calculated correlations between the already received code sequence and the predetermined code sequences, so as to output a path selecting data. The selecting circuits selects, in response to the selecting data, one of the predetermined code sequences as the maximum likelihood sequence with respect to the code sequence generated by the encoder.

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