is the Viterbi decode for the AFS provided by Sylvain right?

Sylvain Munaut 246tnt at gmail.com
Thu Jul 26 09:23:34 UTC 2012


>  search some materials, find that the decode method of AFS convolutional
> code is different from the EFS`, it use RSC, and need SOVA(soft output
> viterbi algorithm). am i right?

No.

It _does_ use RSC (and the viterbi code in libosmocore supports RSC).
But that has nothing to do with SOVA and SOVA is _not_ required at
all.

AFAIK, the AMR code I sent a while is correct. Just to be sure I
attached the latest version I have. I haven't tested all the modes but
at least 12.2 and 10.2 should be correct.

Cheers,

    Sylvain
-------------- next part --------------
A non-text attachment was scrubbed...
Name: conv_tch_afs.c
Type: text/x-csrc
Size: 15081 bytes
Desc: not available
URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20120726/47f41dc4/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: conv_tch_afs.h
Type: text/x-chdr
Size: 625 bytes
Desc: not available
URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20120726/47f41dc4/attachment-0001.bin>


More information about the baseband-devel mailing list