Brian,
FYI, soft versions of the Viterbi decoder (named soft-input/soft-output
blocks) are already implemented in gr-trellis.
In addition a serially concatenated code, and corresponding turbo
decoder is implemented using these blocks in the corresponding
examples directory.
Achilleas
PS: I have mixed feelings about all this being implemented on the FPGA:
is this a software or a hardware radio?
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