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Add AM spectrum ZOOM x3/x4 with optimized x4 decimation (#3304)

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* Add AM spectrum zoom x3 and x4
* Optimize AM spectrum zoom x4 processing
* Fix AM spectrum zoom formatting
* Fix AM spectrum zoom header formatting
This commit is contained in:
Brumi-2021
2026-08-28 12:30:18 +02:00
committed by GitHub
parent 6e95288c1f
commit ee568ec774
15 changed files with 422 additions and 36 deletions
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firmware/baseband/proc_am_audio.cpp
+3 -3
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@@ -51,8 +51,8 @@ void NarrowbandAMAudio::execute(const buffer_c8_t& buffer) {
if (!spectrum_capture_active &&
spectrum_samples >= spectrum_interval_samples) {
spectrum_samples -= spectrum_interval_samples;
channel_spectrum.start_capture(spectrum_zoom_x2 ? 4 : 2);
spectrum_capture_active = true;
spectrum_capture_active =
channel_spectrum.start_capture(spectrum_decimation_factor);
}
if (spectrum_capture_active &&
@@ -146,7 +146,7 @@ void NarrowbandAMAudio::configure(const AMConfigureMessage& message) {
channel_filter_transition = message.channel_filter.transition_normalized * channel_filter_input_fs;
modulation_ssb = (int)message.modulation; // now sending by message , 3 types of AM demod : enum class Modulation : int32_t {DSB = 0, SSB = 1, SSB_FM = 2}
spectrum_zoom_x2 = message.channel_spectrum_decimation_factor == 2;
spectrum_decimation_factor = 2 * message.channel_spectrum_decimation_factor;
channel_spectrum.set_decimation_factor(1);
spectrum_interval_samples =
decim_0_output_fs / spectrum_rate_hz;