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Add power control to AM (power on/off per sample)

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This commit is contained in:
Andreas Eversberg
2019-12-05 21:57:23 +01:00
parent 150a77b69d
commit 4af2dca10d
4 changed files with 10 additions and 8 deletions
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6
src/radio/radio.c
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@@ -546,12 +546,12 @@ int radio_tx(radio_t *radio, float *baseband, int signal_num)
/* prepare baseband */
memset(baseband, 0, sizeof(float) * 2 * signal_num);
memset(signal_power, 1, signal_num);
/* filter audio (remove DC, remove high frequencies, pre-emphasis)
* and modulate */
switch (radio->modulation) {
case MODULATION_FM:
memset(signal_power, 1, signal_num);
pre_emphasis(&radio->fm_emphasis[0], signal_samples[0], signal_num);
clipper_process(signal_samples[0], signal_num);
if (radio->stereo) {
@@ -577,14 +577,14 @@ int radio_tx(radio_t *radio, float *baseband, int signal_num)
/* also clip to prevent overshooting after audio filtering */
clipper_process(signal_samples[0], signal_num);
iir_process(&radio->tx_am_bw_limit, signal_samples[0], signal_num);
am_modulate_complex(&radio->am_mod, signal_samples[0], signal_num, baseband);
am_modulate_complex(&radio->am_mod, signal_samples[0], signal_power, signal_num, baseband);
break;
case MODULATION_AM_USB:
case MODULATION_AM_LSB:
/* also clip to prevent overshooting after audio filtering */
clipper_process(signal_samples[0], signal_num);
iir_process(&radio->tx_am_bw_limit, signal_samples[0], signal_num);
am_modulate_complex(&radio->am_mod, signal_samples[0], signal_num, baseband);
am_modulate_complex(&radio->am_mod, signal_samples[0], signal_power, signal_num, baseband);
break;
default:
break;