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Re: commBCHEncoder/commBCHDecoder
Posted:
Jul 4, 2011 1:50 AM
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"Leonardo O. Iheme" <obina.iheme@yahoo.com> wrote in message <iuckg0$7o3$1@newscl01ah.mathworks.com>...
> "Spiros" wrote in message <ieikf0$s16$1@fred.mathworks.com>...
> > Hi to all,
> > This question is considered with the use of Communications
> > Toolbox/Blockset.
> >
> > I am trying to write a m-file that uses the comm.BCHEncoder/comm.Decoder in MATLAB R2010b for the DVB-T2 (DVB-S2 are the same) standard?.
> >
> > In the DVB-S.2 model in Simulink the compiler doesn't complaint for any LDPC rate and everything seems OK.
> > In my code,if I try to use comm.BCHEncoder with any code rate other than 1/2 again everything is OK.
> > When I try Kbch=32208 and Nbch=32400,
> > I get an error:The values for N and K do not produce a valid narrow-sense BCH code.
> >
> > %-----------------BCH encoding.... --------------------------------------
> > %
> > % Constrution of BCH_Encoder and BCH_Decoder
> > N_BCH=32400;
> > K_BCH=32208;
> > BBFrame=round(rand(32208,1));
> > BCH_Encoder=comm.BCHEncoder('CodewordLength',N_BCH,'MessageLength',K_BCH,'GeneratorPolynomial',g);
> > BCH_Decoder=comm.BCHDecoder('CodewordLength',N_BCH,'MessageLength',K_BCH,'GeneratorPolynomial',g);
> >
> > BCHFrame=step(BCH_Encoder
> > Where BBframe is a random 32400 binary vector, and g the generator polynomial exactly the same as in the Simulink model DVB.S2 (can be found under "dvb stuct".
> > P.S. I also tried to use the PrimitivePolynomial with no success.
> >
> > Hope for help
> > kindly regards Spiros
>
> Hello Spiros,
>
> I am faced with the same problem could you please help me out.
> Your help will be appreciated.
> Thanks a lot
Figured it out myself and solved it. Thanks
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