Re: [Discuss-gnuradio] The GSoC project on LDPC codes.

[Miklos Maroti]

Dear Manu,

Do you have any performance numbers on your LDPC decoder? I could not
find any info, even in your presentation. Do you have also a BER
figure, or even better would be some technical report. I would love to
get some sense on the performance of your implementation.

Best,
Miklos

On Tue, Nov 5, 2013 at 6:15 PM, Manu T S <address@hidden> wrote:
> Dear Max,
>
> You are correct. It is a bug. Now I'm wondering why I didn't get any
> segmentation faults.
>
> Probably I didn't get any segmentation faults because, after i = M - 1, EOF
> has reached.
>
> Thanks for the correction.
>
>
> On Tue, Nov 5, 2013 at 9:14 PM, ikjtel <address@hidden> wrote:
>>
>> Greetings
>>
>> I was very interested in this project for possible application to the op25
>> project, since P25 uses several FEC codes
>> including RS and other block codes.  I've brought up the gr-ldpc library
>> and have a few questions.  Due to the hateful YAhoo mail composer, I'm
>> hesitant to post lengthy emails to the general list with no opportunity for
>> preview prior to hitting SEND, so I'll try breaking up the list of questions
>> into several posts, one per question...
>>
>> First question: I was getting lots of errors, seg faults, aborts, and
>> other misbehavior from the code, which were traced to an apparent bug in
>> alist.cc, all of which cleared up when I applied the following patch:
>>
>> --- ../../repo/gr-ldpc/lib/alist.cc     2013-10-18 10:25:47.508781061
>> -0400
>> +++ ./alist.cc  2013-11-05 11:21:03.879972116 -0500
>> @@ -123,7 +123,7 @@
>>      }
>>
>>      // Parse indices with non zero entries in ith row
>> -    for (int row = 0; row < N; row++) {
>> +    for (int row = 0; row < M; row++) {
>>          std::getline(file, line);
>>          ss << line;
>>          for (int entry = 0; entry < num_mlist[row]; entry++) {
>>
>> Can you confirm, is this really a bug?
>>
>> Thanks and Best
>>
>> Max
>
>
>
>
> --
> Manu T S
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>