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srsLTE
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AGC: Fixed gain hysteresis

This commit is contained in:
Xavier Arteaga 2019-05-14 16:45:54 +02:00 committed by Xavier Arteaga
parent 609e5cce2c
commit 5d792e7ebe
1 changed files with 3 additions and 5 deletions
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8
lib/src/phy/agc/agc.c
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@ -174,7 +174,6 @@ void srslte_agc_process(srslte_agc_t *q, cf_t *signal, uint32_t len) {
}
}
double gg = 1.0;
if (q->isfirst) {
q->y_out = y;
q->isfirst = false;
@ -182,10 +181,9 @@ void srslte_agc_process(srslte_agc_t *q, cf_t *signal, uint32_t len) {
if (q->frame_cnt == 0) {
q->y_out = (1-q->bandwidth) * q->y_out + q->bandwidth * y;
if (!q->lock) {
gg = expf(-0.5*q->bandwidth*logf(q->y_out/q->target));
q->gain *= gg;
}
INFO("AGC gain: %.2f (%.2f) y_out=%.3f, y=%.3f target=%.1f gg=%.2f\n", gain_db, gain_uhd_db, q->y_out, y, q->target, gg);
q->gain *= q->target / q->y_out;
}
INFO("AGC gain: %.2f (%.2f) y_out=%.3f, y=%.3f target=%.1f\n", gain_db, gain_uhd_db, q->y_out, y, q->target);
}
}
}