Bahman
Posts:
9
Registered:
4/12/11
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Re: commBCHEncoder/commBCHDecoder
Posted:
Jul 16, 2012 2:04 AM
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"Fulus " <case28@gmail.com> wrote in message <jtvqk3$pdo$1@newscl01ah.mathworks.com>...
> Hello,
>
> Thank you so much for the initialization you sent me, I have a better understanding now, the BCH is encoding well now. However, the LDPC is a bit of a problem. after the bchecoding the ldpc encoder returns that; ''Input must be a column vector of length K''. I then reshapes the output bchfec - xsym=reshape( bchfec,length( bchfec)/k,k);
>
> making it frame based column vectors of lenght N_BCH as input to the ldpc encoder. this now returns a diff error which I do not understand
>
> Error using LDPCEncoder/step
> Multichannel operation is not supported.
>
> Error in DVBS2_a (line 54)
> FECFrame=step(hEnc,xsym);
>
> I am looking into any method to "Split Multichannel Frame-Based Signals into Individual Signals". I have had little or no success on it. I kindly would love ur input on how to go about this.
>
> Thank you
Hi dear Fulus
There is no need to reshape only invert the out put of bch encoder
Suppose that the output of bch is this:
encodedData = step(EncoderBCH, data);
then you invert it
encodedData=encodedData';
then
codeword = encode(henc, encodedData);
codeword will be your LDPC FECFRAME
Bahman
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