Attention is currently required from: fixeria, pespin. laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-bts/+/27778 )

Change subject: osmo-bts-trx: amr_loop: do not miss C/I samples ......................................................................

Patch Set 2: Code-Review+1

(1 comment)

File src/osmo-bts-trx/amr_loop.c:

https://gerrit.osmocom.org/c/osmo-bts/+/27778/comment/e72f2908_f369bc53 PS1, Line 53: if (mi != chan_state->dl_cmr)

This is a good question, and it applies to the MS/BS power loops too. […]

I would expect the C/I ratio to stay more or less the same, no matter which codec mode is used. C/I _should_ reflect the raw carrier to interference ratio, irrespective of the channel coding we are using. Or am Igetting this wrong?

Similarly, BER is the raw bit error rate (not affected by coding changes) while RBER (residual BER) is the amount of remaining bit errors after convolutional decoding.