Re: Fec issues...

[Nicholas Long]

That fixed it...  thank you so much.

I had never used volk_profile before.

A couple questions:

what is the difference between generic and spiral?

I had not run volk profile previously, what instructions are used by default?

Thanks again for the help,

Nick

On Thu, Mar 11, 2021, 12:47 Tim Huggins <huggins.timothy@yahoo.com> wrote:

Nick,

It sounds like you are experiencing this issue: https://github.com/gnuradio/gnuradio/issues/3376

Try the solution mentioned:

Run volk_profile, then inspect ~/.volk/volk_config. Find the line that starts with:

volk_8u_x4_conv_k7_r2_8u

and make sure, it ends with spiral spiral (or generic generic or a mix thereof)

      volk_8u_x4_conv_k7_r2_8u spiral spiral

and see if that helps.

Tim

On Thursday, March 11, 2021, 1:33:59 PM EST, Nicholas Long <nicholaslong94@gmail.com> wrote:

Hi all, so I am trying to get the convolutional encoder from gr-fec to work, but I seem to be missing something as I am having issues... 

Specifically I am looking at cc encoder/decoder definition and fec extended encoder/decoder.

However when I try the example fecapi_cc_decoders the output of encoding seems wrong... And after decoding does not match with the original bitstream.

Any thoughts on what I'm missing?

Thanks, 

Nick