A hardware viterbi decoder of punctured codes is commonly implemented in such a way:
- A depuncturer, which transforms the input stream into the stream which looks like an original (non punctured) stream with ERASE marks at the places where bits were erased.
- A basic viterbi decoder understanding these ERASE marks (that is, not using them for branch metric calculation).
Read more about this topic: Viterbi Decoder
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