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Topic: commBCHEncoder/commBCHDecoder
Replies: 35   Last Post: Oct 13, 2014 2:17 AM

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Bahman

Posts: 9
Registered: 4/12/11
Re: commBCHEncoder/commBCHDecoder
Posted: Aug 22, 2012 8:06 AM
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"Ed MrTz" wrote in message <k12c08$sbt$1@newscl01ah.mathworks.com>...
> "Bahman " <bahmanazarbad@yahoo.com> wrote in message <k0hsbu$1kd$1@newscl01ah.mathworks.com>...
> > "Fulus " <case28@gmail.com> wrote in message <k0g2j4$ar5$1@newscl01ah.mathworks.com>...
> > > > Hi dear
> > > >
> > > > is your bbframe a row vector?
> > > > because error indicates that it is a column vector,try it inverted (BBframe')

> > >
> > > Hello,
> > >
> > > yeah you right, I nverted it and it runs without errors now however, it still isnt function as it suppose to because as I go higher in Eb/No my BER isnt going lower but is actually increasing by a tiny amount. That is the Decoder is still introducing errors.

> >
> > Hi dear
> > you need to be careful about the noise you are introducing to awgn as well as noise variance you need to set in demodulator

>
> Hi Everyone!
>
> I hope that someone could help me, even.
>
> I had the sames problems with BCH and LDPC Enc/Dec to make it run......but at the end I can solved.
>
> Now, my problem is that when I use (without add a AWGN channel and modulation) encoder and decoder of BCH (in raw)......its returns 0 errors between the original msg and received/decoded msg. But its not so when I use LDPC (in raw) because I get to many errors (original msg - decoded msg).
>
> Do you know why? I attach the code that I use:
> H=dvbs2ldpc(1/4);
> enc = fec.ldpcenc(H);
>
> dec = fec.ldpcdec(H);
> dec.DecisionType = 'Hard decision';
> dec.OutputFormat = 'Information part';
> dec.NumIterations = 50;
>
> msg = randi([0 1],1,enc.NumInfoBits);
> codeword = encode(enc,msg);
>
> decodedmsg = decode(dec, codeword);



>
> % Compare with original message
> disp(['Number of bits incorrectly decoded = ' ...
> num2str(nnz(decodedmsg-msg))]);
>
> THANXXXX

DEAR WHERE IS YOUR TRANSMISSION CHANNEL??????
BAHMAN


Date Subject Author
12/18/10
Read commBCHEncoder/commBCHDecoder
Spiros
12/20/10
Read Re: commBCHEncoder/commBCHDecoder
Ethem
12/20/10
Read Re: commBCHEncoder/commBCHDecoder
Spiros
3/2/11
Read Re: commBCHEncoder/commBCHDecoder
Adam
3/4/11
Read Re: commBCHEncoder/commBCHDecoder
Spiros
4/12/11
Read Re: commBCHEncoder/commBCHDecoder
Bahman
4/15/11
Read Re: commBCHEncoder/commBCHDecoder
Spiros
6/2/11
Read Re: commBCHEncoder/commBCHDecoder
allice
5/22/11
Read Re: commBCHEncoder/commBCHDecoder
Ratty
4/12/11
Read Re: commBCHEncoder/commBCHDecoder
Bahman
6/23/12
Read Re: commBCHEncoder/commBCHDecoder
Fulus
6/23/12
Read Re: commBCHEncoder/commBCHDecoder
Fulus
6/24/12
Read Re: commBCHEncoder/commBCHDecoder
Bahman
6/25/12
Read Re: commBCHEncoder/commBCHDecoder
Fulus
7/2/12
Read Re: commBCHEncoder/commBCHDecoder
Fulus
7/3/12
Read Re: commBCHEncoder/commBCHDecoder
Bahman
7/15/12
Read Re: commBCHEncoder/commBCHDecoder
Fulus
7/16/12
Read Re: commBCHEncoder/commBCHDecoder
Bahman
7/16/12
Read Re: commBCHEncoder/commBCHDecoder
Fulus
7/17/12
Read Re: commBCHEncoder/commBCHDecoder
Bahman
8/14/12
Read Re: commBCHEncoder/commBCHDecoder
Fulus
8/14/12
Read Re: commBCHEncoder/commBCHDecoder
Bahman
8/15/12
Read Re: commBCHEncoder/commBCHDecoder
Fulus
8/16/12
Read Re: commBCHEncoder/commBCHDecoder
Bahman
8/22/12
Read Re: commBCHEncoder/commBCHDecoder
Ed MrTz
8/22/12
Read Re: commBCHEncoder/commBCHDecoder
Bahman
8/22/12
Read Re: commBCHEncoder/commBCHDecoder
Ethem Sozer
8/25/12
Read Re: commBCHEncoder/commBCHDecoder
Ed MrTz
12/29/12
Read Re: commBCHEncoder/commBCHDecoder
Ed MrTz
5/14/11
Read Re: commBCHEncoder/commBCHDecoder
Akilan
6/28/11
Read Re: commBCHEncoder/commBCHDecoder
Leonardo O. Iheme
7/4/11
Read Re: commBCHEncoder/commBCHDecoder
Leonardo O. Iheme
12/7/11
Read Re: commBCHEncoder/commBCHDecoder
Brian
12/7/11
Read Re: commBCHEncoder/commBCHDecoder
Brian
4/19/14
Read Re: commBCHEncoder/commBCHDecoder
ibrahemsami100@gmail.com
10/13/14
Read Re: commBCHEncoder/commBCHDecoder
sofiasankaran91@gmail.com

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