Re: CCSDS BCH and CLTU coding

[WarMonkey]

CCSDS BCH(63,56) is a block code, take 7 bytes as input, 63bits as output. see details in ccsds 231 book.

On Wed, 9 Nov 2022 at 19:31, Yotam Rabin <rabinyotam@gmail.com> wrote:

Hi I have a couple of follow up questions:
1. What is the purpose of the   "Acq_samples" and "CLTU's" arguments used by the block?

2. I installed the OOT module on gnuradio 3.7, but it looks like gnuradio fails to import the module and I'm receiving an import error "no module named kcsa_swig" .
Do you know what I'm missing by any chance? 
Thanks, 

Yotam 

On Mon, Nov 7, 2022 at 12:11 PM Yotam Rabin <rabinyotam@gmail.com> wrote:

Great, thanks! 

On Mon, Nov 7, 2022 at 11:55 AM WarMonkey <luoshumymail@gmail.com> wrote:

Reuse the function and build your OOT module.

On Mon, 7 Nov 2022 at 17:54, Yotam Rabin <rabinyotam@gmail.com> wrote:

Thank you, I see that the library is built for gnuradio 3.7, is there a ported version for 3.8 by any chance? 

On Sat, Nov 5, 2022 at 6:39 AM WarMonkey <luoshumymail@gmail.com> wrote:

Check this out

https://github.com/opensatellite/KS-1Q/blob/master/host/gr-kcsa-ks1q/lib/halfduplex_tc_impl.cc#L195

Yotam Rabin <rabinyotam@gmail.com> 于2022年11月3日周四 21:50写道：

Hi everyone! 
I'm trying to design a gnuradio based ccsds transmitter using the ccsds 231.0-b TC standard.
My design requires the use of BCH (63,56) code and the encapsulation of the data inside the CLTU packet.  

Does anyone have any experience with this in gnuradio ? I wasn't able to find any implementations of such coding. 

Any help would be greatly appreciated
Thanks,

Yotam