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srsLTE
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Proper normalization to noise power estimation in chest_dl

This commit is contained in:
Ismael Gomez 2018-02-08 20:58:43 +01:00
parent 7ae186d499
commit c429f3031f
1 changed files with 8 additions and 4 deletions
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12
lib/src/phy/ch_estimation/chest_dl.c
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@ -282,10 +282,14 @@ static float estimate_noise_pilots(srslte_chest_dl_t *q, uint32_t port_id, srslt
/* Compute average power. Normalized for filter len 3 using matlab */
float norm = 1;
if (q->smooth_filter_len == 3) {
float a = q->smooth_filter[0];
float norm3 = 6.143*a*a+0.04859*a-0.002774;
norm /= norm3;
if (q->average_subframe) {
norm = 32;
} else {
if (q->smooth_filter_len == 3) {
float a = q->smooth_filter[0];
float norm3 = 6.143*a*a+0.04859*a-0.002774;
norm /= norm3;
}
}
float power = norm*q->cell.nof_ports*srslte_vec_avg_power_cf(q->tmp_noise, nref);
return power;