| 摘要 |
For a Viterbi decoder, it is proposed to combine the butterfly structures of the corresponding trellis diagram in pairs in such a way that for each butterfly structure pair, the destination states of the two butterfly structures in the trellis diagram at the same time form starting states for two other butterfly structures. After the determination of the path metrics of the destination states of the two butterfly structures of a butterfly structure pair, in each case the path metrics of those two destination states of this butterfly structure pair which are the same time form starting states of another butterfly structure are then stored in the form of a common memory word.
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