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LDPC Decoder source code

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m_llaa

m_llaa

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ldpc source code

Hi
I have a urgent need to LDPC decoder source code for SPA(Sum Product) or BP(Belif Propagation) algorithm.
I wrote 1 in matlab but its result doesnt match to some famous papers.
thanks

m_llaa@yahoo.com
 

Thanks
I think that link to mathwork is useful
I will test it
 

Hi to every one
I tested it. I compare my resualts by results in
"Low-Density Parity-Check Codes Based on Finite Geometries: A Rediscovery and New Results" by Shu Lin and Fossorier and Yu Khu
I simulate (255,175) EG LDPC. my BER in 1 dB and 2dB is the same to that paper but the difference in 3dB is large. (see attachment)

Please help me to simulate some LDPC code.
Regards
M.Lari
 

3dB - you might be forgetting the factor of "2" in the noise variance calculation.
 

Hi
No, I dont forget power 2.
also the difference is more than 3 dB, it is about 8 dB
 

m_llaa said:
Hi to every one
I tested it. I compare my resualts by results in
"Low-Density Parity-Check Codes Based on Finite Geometries: A Rediscovery and New Results" by Shu Lin and Fossorier and Yu Khu
I simulate (255,175) EG LDPC. my BER in 1 dB and 2dB is the same to that paper but the difference in 3dB is large. (see attachment)

Please help me to simulate some LDPC code.
Regards
M.Lari
Click to expand...

Hi ,
Is it a textbook or paper.
Can you post it here.
Do u have the code for it.
 

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