Re: [Discuss-gnuradio] use of CCSDS 27 encoder-decoder blocks

[Tom Rondeau]

On Fri, Jan 1, 2016 at 3:17 AM, Hitesh Kasera <address@hidden> wrote:

Hi everyone,

I am trying to use ccsds 27 encoder-decoder to transmit some data. The decoded data is not same as transmitted. As a source i am transmitting ones and zeros but after decoding sometimes i am receiving values which are greater than 1.  i am not able to recognize where am i going wrong. if anyone has any idea please tell me. i have attached both grc file and png image of my flow graph.

Best Regards,

Hitesh

Changing the problem a bit, I'd recommend moving away from the CCSDS encoder/decoder blocks and using the FEC API blocks, instead. See:

http://gnuradio.org/doc/doxygen/page_fec.html

The CC Encoder and CC Decoder are basically the CCSDS codes (you might have to swap the two polynomials; I always forget off the top of my head which is called which code here).

Tom