comm.ViterbiDecoder with Trellis for HDL code generation

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Stefan
Stefan 2013-12-10
Hello, I want to use the comm.ViterbiDecoder in my design and want to generate HDL code out of my design. Unfortunatelly I get always error massages during the fixed point Types validation. It seems that poly2trellis is not supported for fixed point conversion. I tried to define the Trellis by my own, but 'struct' is also not supported for fixed point conversion. This is my code:
persistent hVitDec;
if isempty (hVitDec)
Trellis = poly2trellis(7,[133 171 145 133]);
hVitDec = comm.ViterbiDecoder('TrellisStructure',Trellis,...)
end
out_1 = step(hVitDec, c_in1);
Does someone know a workaround, so I can use the ViterbiDecoder with Trellis for HDL code generation? I'm using Matlab 2013a on Win7.
Thanks a lot, Stefan

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