diff options
| author | Sylvain Munaut <tnt@246tNt.com> | 2016-10-30 20:30:32 +0100 |
|---|---|---|
| committer | Sylvain Munaut <tnt@246tNt.com> | 2019-08-31 08:15:37 +0200 |
| commit | 90526bca2ebdc9709d50fb94ee41662980643b36 (patch) | |
| tree | 1fa71b42adeb8561bef8d5a194587baf8c0bcb69 | |
| parent | 8d51afb9392a66da74588e26121882d283453a6b (diff) | |
gmr1_rx: FCCH SNR computation improvement
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
| -rw-r--r-- | src/gmr1_rx.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/src/gmr1_rx.c b/src/gmr1_rx.c index 716bd63..a62b3a1 100644 --- a/src/gmr1_rx.c +++ b/src/gmr1_rx.c @@ -678,22 +678,16 @@ fcch_multi_process(struct chan_desc *cd, fcch_multi_cb_t cb) return rv; } - /* Compute SNR (comparing energy with neighboring CICH) */ + /* Compute SNR */ win_map(win, cd->bcch, - base_align + mtoa[i] + toa + 5 * cd->sps, - (117 - 10) * cd->sps - ); - - e_fcch = burst_energy(win); - - win_map(win, cd->bcch, - base_align + mtoa[i] + toa + (5 + 117) * cd->sps, - (117 - 10) * cd->sps + base_align + mtoa[i] + toa, + fcch_type->len * cd->sps ); - e_cich = burst_energy(win); - - snr = e_fcch / e_cich; + rv = gmr1_fcch_snr(fcch_type, win, cd->sps, -(cd->freq_err + freq_err), &snr); + if (rv) { + fprintf(stderr, "[!] Error during FCCH SNR estimation (%d)\n", rv); + } /* Check against strongest */ if (i==0) { |