Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi
I assume saving you do is for saving the ldpc parity check matrix file. This I am not aware of. Even I try to write a software which converts sparse matrix to alist format. When I do that sure I will mail you.
BTW I too get BER zero for higher SNRs , theoritically it is not. May be our H is...
Hi
I think the matrix you generate is not LDPC , ie it is not actually aprse. That is the reason u dont get BER=0. The best method is to get any .alist file from Mckay site as I said already. May be I can attach it for u.
Use alist2sparse to convert to sparse format. With this you would get BER...
Hi
You dont get perfect results (ber =0) if you use just modulation, but you can get it when you use channel coding. Try LDPC channel coding on QPSK modulated waveform
I am not sure about whether u can use cyclic code matrix for LDPC. But I can suggest you to get parity check matrix from Mackay and Neal site which is in alist format. This u can convert to sparse format rquired by matlab routine by alist2sparse which is also available online. This would work.
Banu
If any body has working on LLR decoding algorithm of LDPC using the code given in ecc.com please help me. It works only for one cycle or in other way it gives the same error rate from iteration one to iternation n.
Hi I had checked the code here. One thing is the decoder becomes success, but I see 4 to 5 bits differences between the original input and LDPC decoded output ?Why ?
Hi
Can anybody help me on quantization with LDPC coding ?. I do not understand the need of quantization after demodulation and before LDPC decoding. Please quote some good reference material on the same.
Thanx n Regards
Banu
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
