Re: [Discuss-gnuradio] How to decode the convolutional code in the GRC

[Ben Reynwar]

You probably want to use the trellis_viterbi_combined block.

The documentation for the trellis blocks is in
gnuradio/gr-trellis/doc/gr-trellis.xml.
(if you have xmlto installed then an html file is also built.)

Ben

2011/3/10 intermilan <address@hidden>:
> Hi all:
>       Now I want to use the Trellis_encoder block in the GRC to make an
> example for the convolutional code.In my opinion, I use Trellis_encoder to
> produce the convolutional code,  then make the convolutional code through
> the modulator and demodulator(such as DPSK), finally use some block to
> decode the convolutional code to get the original data.But after the data
> get out the demodulator,I do not know how to decode it.
>      Here is the flow graph I used:
>
> vector_source->throttle->Packed_to_Unpacked->Trellis_encoder->Packet_encoder->DPSK_mod->DPSK_demod->Packet_decoder->?
>     Can anyone tell me which block I should use after the Packet_decoder to
> decode the convolutional code?
>
>
> Thank you in advance.
>
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