Hi everyone, I want to implement convolutional coding using the trellis block. I don't want to use any modulation scheme or anything else after the encoder. The flow graph I want is shown below
vector source---->trellis encoder----> viterbi or any decoder------->sink Part of the code is shown below ---------------------------------------------------------------------------- src_d = (1,0,1,0,0,0,1,1,0,0,1) sorc = gr.vector_source_b (src_d) //source encoder = trellis.encoder_bs(f,0) //encoder s2f= gr.short_to_float() dec=trellis.viterbi_s(f,len(src_d),0,-1) //decoder dst = gr.vector_sink_s () //sink tb.connect (sorc,encoder,s2f,dec,dst) return(dst.data()) ---------------------------------------------------------------------------- When I run the above flow graph I get nothing just empty, ( ), list. I am using "awgn1o2_4.fsm" file. I got the correct result after encoder. I can't use the trellis.metric or trellis.viterbi_combined_X to implement decoder as I am not using any modulation :( . Can anybody please help me in this ?? Regards Smith
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