Adding_WFM_AM_mode_to_Audio_App (#2644)

* Adding_WFM_AM_mode_to_Audio_App
* more precise values for cos and sin theta, fix sen_theta to sin_theta
* fix sen_theta to sin_theta
This commit is contained in:
Brumi-2021 2025-05-05 17:48:01 +02:00 committed by GitHub
parent bd781ce37b
commit 4342f5c0ee
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GPG key ID: B5690EEEBB952194
18 changed files with 448 additions and 49 deletions

View file

@ -114,6 +114,26 @@ WFMOptionsView::WFMOptionsView(
};
}
/* WFMAMAptOptionsView *******************************************************/
WFMAMAptOptionsView::WFMAMAptOptionsView(
Rect parent_rect,
const Style* style)
: View{parent_rect} {
set_style(style);
add_children({
&label_config,
&options_config,
});
freqman_set_bandwidth_option(WFMAM_MODULATION, options_config); // adding the common message from freqman.cpp to the options_config
options_config.set_by_value(receiver_model.wfmam_configuration());
options_config.on_change = [this](size_t, OptionsField::value_t n) {
receiver_model.set_wfmam_configuration(n);
};
}
/* AMFMAptOptionsView *********************************************************/
AMFMAptOptionsView::AMFMAptOptionsView(
@ -415,6 +435,12 @@ void AnalogAudioView::on_show_options_modulation() {
text_ctcss.hidden(true);
break;
case ReceiverModel::Mode::WFMAudioAMApt:
widget = std::make_unique<WFMAMAptOptionsView>(options_view_rect, Theme::getInstance()->option_active);
waterfall.show_audio_spectrum_view(true);
text_ctcss.hidden(true);
break;
case ReceiverModel::Mode::AMAudioFMApt:
widget = std::make_unique<AMFMAptOptionsView>(this, options_view_rect, Theme::getInstance()->option_active);
waterfall.show_audio_spectrum_view(false);
@ -462,7 +488,10 @@ void AnalogAudioView::update_modulation(ReceiverModel::Mode modulation) {
case ReceiverModel::Mode::WidebandFMAudio:
image_tag = portapack::spi_flash::image_tag_wfm_audio;
break;
case ReceiverModel::Mode::AMAudioFMApt: // TODO pending to update it.
case ReceiverModel::Mode::WFMAudioAMApt:
image_tag = portapack::spi_flash::image_tag_wfm_audio;
break;
case ReceiverModel::Mode::AMAudioFMApt:
image_tag = portapack::spi_flash::image_tag_am_audio;
break;
case ReceiverModel::Mode::SpectrumAnalysis:
@ -501,7 +530,10 @@ void AnalogAudioView::update_modulation(ReceiverModel::Mode modulation) {
case ReceiverModel::Mode::WidebandFMAudio:
sampling_rate = 48000;
break;
case ReceiverModel::Mode::AMAudioFMApt: // TODO Wefax mode.
case ReceiverModel::Mode::WFMAudioAMApt:
sampling_rate = 12000;
break;
case ReceiverModel::Mode::AMAudioFMApt:
sampling_rate = 12000;
break;
default:

View file

@ -74,7 +74,7 @@ class AMFMAptOptionsView : public View {
OptionsField options_config{
{3 * 8, 0 * 16},
6, // Max option length chars
6, // Max option length chars "USB+FM"
{
// Using common messages from freqman_ui.cpp In HF USB , Here we only need USB Audio demod, + post-FM demod fsubcarrier FM tone to get APT signal.
}};
@ -132,6 +132,23 @@ class WFMOptionsView : public View {
}};
};
class WFMAMAptOptionsView : public View {
public:
WFMAMAptOptionsView(Rect parent_rect, const Style* style);
private:
Text label_config{
{0 * 8, 0 * 16, 2 * 8, 1 * 16},
"BW",
};
OptionsField options_config{
{3 * 8, 0 * 16},
10, // Max option char length "FM+AM(DSB)"
{
// Using common messages from freqman_ui.cpp
}};
};
class SPECOptionsView : public View {
public:
SPECOptionsView(AnalogAudioView* view, Rect parent_rect, const Style* style);
@ -215,7 +232,7 @@ class AnalogAudioView : public View {
uint8_t zoom_factor_amfm{0}; // initial zoom factor in AMFM mode
uint8_t previous_AM_mode_option{0}; // GUI 5 AM modes : (0..4 ) (DSB9K, DSB6K, USB,LSB, CW). Used to select proper FIR filter (0..11) AM mode + offset 0 (zoom+1) or +6 (if zoom+2)
uint8_t previous_zoom{0}; // GUI ZOOM+1, ZOOM+2 , equivalent to two values offset 0 (zoom+1) or +6 (if zoom+2)
//
app_settings::SettingsManager settings_{
"rx_audio",
app_settings::Mode::RX,
@ -261,7 +278,8 @@ class AnalogAudioView : public View {
{"NFM ", toUType(ReceiverModel::Mode::NarrowbandFMAudio)},
{"WFM ", toUType(ReceiverModel::Mode::WidebandFMAudio)},
{"SPEC", toUType(ReceiverModel::Mode::SpectrumAnalysis)},
{"AMFM", toUType(ReceiverModel::Mode::AMAudioFMApt)} // Added to handle HF WeatherFax , SSB (USB demod) + Tone_Subcarrier FM demod
{"AMFM", toUType(ReceiverModel::Mode::AMAudioFMApt)}, // Added to handle HF WeatherFax , SSB (USB demod) + Tone_Subcarrier FM demod
{"FMAM", toUType(ReceiverModel::Mode::WFMAudioAMApt)} // Added to handle SAT NOAA APT
}};
AudioVolumeField field_volume{

View file

@ -45,7 +45,7 @@ using option_db_t = std::pair<std::string_view, int32_t>;
using options_db_t = std::vector<option_db_t>;
extern options_db_t freqman_modulations;
extern options_db_t freqman_bandwidths[5];
extern options_db_t freqman_bandwidths[6];
// extern options_db_t freqman_steps; // now included via ui_receiver.hpp
extern options_db_t freqman_steps_short;

View file

@ -93,9 +93,9 @@ void NBFMConfig::apply(const uint8_t squelch_level) const {
void WFMConfig::apply() const {
const WFMConfigureMessage message{
decim_0, // taps_200k_decim_0 , taps_180k_wfm_decim_0, taps_40k_wfm_decim_0
decim_1, // taps_200k_decim_1 or taps_180k_wfm_decim_1, taps_40k_wfm_decim_1
taps_64_lp_156_198,
decim_0, // Dynamic array 24 taps : taps_200k_decim_0 , taps_180k_wfm_decim_0, taps_40k_wfm_decim_0
decim_1, // Dynamic array 16 taps : taps_200k_decim_1 or taps_180k_wfm_decim_1, taps_40k_wfm_decim_1
taps_64_lp_156_198, // Fixed channel audio filter 15khz
75000,
audio_48k_hpf_30hz_config,
audio_48k_deemph_2122_6_config};
@ -103,6 +103,18 @@ void WFMConfig::apply() const {
audio::set_rate(audio::Rate::Hz_48000);
}
void WFMAMConfig::apply() const {
const WFMAMConfigureMessage message{
decim_0, // Fixed 24 taps array : taps_16k0_decim_0
decim_1, // Fixed 32 taps array : taps_84k_wfm_decim_1
taps_64_lp_1875_2166, // Fixed channel audio filter , 64 taps array , to filter DSB AM 2k4 carrier before demod. AM .
17000, // NOAA satellite tx , FM deviation = +-17Khz.
apt_audio_12k_notch_2k4_config,
apt_audio_12k_lpf_2000hz_config};
send_message(&message);
audio::set_rate(audio::Rate::Hz_12000);
}
void set_tone(const uint32_t index, const uint32_t delta, const uint32_t duration) {
shared_memory.bb_data.tones_data.tone_defs[index].delta = delta;
shared_memory.bb_data.tones_data.tone_defs[index].duration = duration;

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@ -56,12 +56,19 @@ struct NBFMConfig {
};
struct WFMConfig {
const fir_taps_real<24> decim_0; // To handle both WFM filters , 200k and 40K for NOAA APT
const fir_taps_real<24> decim_0; // To handle all 3 WFM filters , 200k, 180k and 40K-
const fir_taps_real<16> decim_1;
void apply() const;
};
struct WFMAMConfig {
const fir_taps_real<24> decim_0; // To handle WFM filter BW=40K for NOAA APT
const fir_taps_real<32> decim_1;
void apply() const;
};
void set_tone(const uint32_t index, const uint32_t delta, const uint32_t duration);
void set_tones_config(const uint32_t bw, const uint32_t pre_silence, const uint16_t tone_count, const bool dual_tone, const bool audio_out);
void kill_tone();

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@ -157,6 +157,9 @@ bool DebugDumpView::debug_dump_func() {
case ReceiverModel::Mode::WidebandFMAudio:
pmem_dump_file.write_line("modulation: Mode::WidebandFMAudio");
break;
case ReceiverModel::Mode::WFMAudioAMApt:
pmem_dump_file.write_line("modulation: Mode::WFMAudioAMApt");
break;
case ReceiverModel::Mode::SpectrumAnalysis:
pmem_dump_file.write_line("modulation: Mode::SpectrumAnalysis");
break;

View file

@ -42,7 +42,8 @@ enum freqman_entry_modulation : uint8_t {
NFM_MODULATION,
WFM_MODULATION,
SPEC_MODULATION,
AMFM_MODULATION // Added for Wefax.
AMFM_MODULATION, // Added for HF Wefax.demod APT signal
WFMAM_MODULATION // Added for NOAA 137 Mhz satellite band, demod APT signal.
};
// TODO: Can these be removed after Recon is migrated to FreqmanDB?

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@ -49,10 +49,11 @@ options_t freqman_modulations = {
{"NFM", 1},
{"WFM", 2},
{"SPEC", 3},
{"AMFM", 4},
{"AMFM", 4}, // To handle HF Wefax AM and FM demod. inside Audio App.
{"FMAM", 5}, // To handle NOAA 137 Mhz Sat FM and AM demod inside Audio App.
};
options_t freqman_bandwidths[5] = {
options_t freqman_bandwidths[6] = {
{
// AM
{"DSB 9k", 0},
@ -103,7 +104,11 @@ options_t freqman_bandwidths[5] = {
},
{
// AMFM for Wefax-
{"USB+FM", 5}, // Fixed RX demodul AM config Index 5 : USB+FM for Audio Weather fax (WFAX) tones.
{"USB+FM", 5}, // Fixed RX demod. AM config Index 5 : USB+FM for Audio Weather fax (WFAX) tones.
},
{
// WFMAM for NOAA satellites, 137 Mhz band
{"FM+AM(DSB)", 1}, // Fixed RX demod- WFM config Index 1 : FM+AM for Audio NOAA APT ones.
},
};

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@ -41,20 +41,20 @@ namespace {
static constexpr std::array<baseband::AMConfig, 12> am_configs{{
// we config here all the non COMMON parameters to each AM modulation type in RX.
{taps_6k0_decim_1, taps_9k0_decim_2, taps_9k0_dsb_channel, AMConfigureMessage::Modulation::DSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // AM DSB-C BW 9khz (+-4k5) commercial EU bandwidth .
{taps_6k0_decim_1, taps_6k0_decim_2, taps_6k0_dsb_channel, AMConfigureMessage::Modulation::DSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // AM DSB-C BW 6khz (+-3k0) narrow AM , ham equipments.
{taps_6k0_decim_1, taps_6k0_decim_2, taps_2k8_usb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // SSB USB BW 2K8 (+ 2K8) SSB ham equipments.
{taps_6k0_decim_1, taps_6k0_decim_2, taps_2k8_lsb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // SSB LSB BW 2K8 (- 2K8) SSB ham equipments.
{taps_6k0_decim_1, taps_6k0_decim_2, taps_0k7_usb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // SSB USB BW 0K7 (+ 0K7) To get audio tone from CW Morse, assuming tx shifted +700hz aprox
{taps_6k0_decim_1, taps_6k0_decim_2, taps_2k6_usb_wefax_channel, AMConfigureMessage::Modulation::SSB_FM, audio_12k_lpf_1500hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // SSB USB+FM to demod. Subcarrier FM Audio Tones to get APT Weather Fax.
{taps_6k0_decim_1, taps_9k0_decim_2, taps_9k0_dsb_channel, AMConfigureMessage::Modulation::DSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // AM DSB-C BW 9khz (+-4k5) commercial EU bandwidth .
{taps_6k0_decim_1, taps_6k0_decim_2, taps_6k0_dsb_channel, AMConfigureMessage::Modulation::DSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // AM DSB-C BW 6khz (+-3k0) narrow AM , ham equipments.
{taps_6k0_decim_1, taps_6k0_decim_2, taps_2k8_usb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // SSB USB BW 2K8 (+ 2K8) SSB ham equipments.
{taps_6k0_decim_1, taps_6k0_decim_2, taps_2k8_lsb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // SSB LSB BW 2K8 (- 2K8) SSB ham equipments.
{taps_6k0_decim_1, taps_6k0_decim_2, taps_0k7_usb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // SSB USB BW 0K7 (+ 0K7) To get audio tone from CW Morse, assuming tx shifted +700hz aprox
{taps_6k0_decim_1, taps_6k0_decim_2, taps_2k6_usb_wefax_channel, AMConfigureMessage::Modulation::SSB_FM, apt_audio_12k_lpf_1500hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_1}, // SSB USB+FM to demod. Subcarrier FM Audio Tones to get APT Weather Fax.
// below options for Waterfall zoom x 2
{taps_6k0_narrow_decim_1, taps_9k0_decim_2, taps_9k0_dsb_channel, AMConfigureMessage::Modulation::DSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // AM DSB-C BW 9khz (+-4k5) commercial EU bandwidth .
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_6k0_dsb_channel, AMConfigureMessage::Modulation::DSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // AM DSB-C BW 6khz (+-3k0) narrow AM , ham equipments.
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_2k8_usb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // SSB USB BW 2K8 (+ 2K8) SSB ham equipments.
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_2k8_lsb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // SSB LSB BW 2K8 (- 2K8) SSB ham equipments.
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_0k7_usb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // SSB USB BW 0K7 (+ 0K7) To get audio tone from CW Morse, assuming tx shifted +700hz aprox
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_2k6_usb_wefax_channel, AMConfigureMessage::Modulation::SSB_FM, audio_12k_lpf_1500hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // SSB USB+FM to demod. Subcarrier FM Audio Tones to get APT Weather Fax with waterfall zoom x 2 (we need taps_6k0_narrow_decim_1 to minimize aliasing)
{taps_6k0_narrow_decim_1, taps_9k0_decim_2, taps_9k0_dsb_channel, AMConfigureMessage::Modulation::DSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // AM DSB-C BW 9khz (+-4k5) commercial EU bandwidth .
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_6k0_dsb_channel, AMConfigureMessage::Modulation::DSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // AM DSB-C BW 6khz (+-3k0) narrow AM , ham equipments.
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_2k8_usb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // SSB USB BW 2K8 (+ 2K8) SSB ham equipments.
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_2k8_lsb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // SSB LSB BW 2K8 (- 2K8) SSB ham equipments.
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_0k7_usb_channel, AMConfigureMessage::Modulation::SSB, audio_12k_hpf_300hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // SSB USB BW 0K7 (+ 0K7) To get audio tone from CW Morse, assuming tx shifted +700hz aprox
{taps_6k0_narrow_decim_1, taps_6k0_decim_2, taps_2k6_usb_wefax_channel, AMConfigureMessage::Modulation::SSB_FM, apt_audio_12k_lpf_1500hz_config, (int)AMConfigureMessage::Zoom_waterfall::ZOOM_x_2}, // SSB USB+FM to demod. Subcarrier FM Audio Tones to get APT Weather Fax with waterfall zoom x 2 (we need taps_6k0_narrow_decim_1 to minimize aliasing)
}};
static constexpr std::array<baseband::NBFMConfig, 3> nbfm_configs{{
@ -69,6 +69,10 @@ static constexpr std::array<baseband::WFMConfig, 3> wfm_configs{{
{taps_40k_wfm_decim_0, taps_40k_wfm_decim_1},
}};
static constexpr std::array<baseband::WFMAMConfig, 1> wfmam_configs{{
{taps_16k0_decim_0, taps_84k_wfmam_decim_1},
}};
} /* namespace */
rf::Frequency ReceiverModel::target_frequency() const {
@ -187,6 +191,17 @@ void ReceiverModel::set_wfm_configuration(uint8_t n) {
}
}
uint8_t ReceiverModel::wfmam_configuration() const {
return settings_.wfmam_config_index;
}
void ReceiverModel::set_wfmam_configuration(uint8_t n) {
if (n < wfmam_configs.size()) {
settings_.wfmam_config_index = n;
update_modulation();
}
}
uint8_t ReceiverModel::squelch_level() const {
return settings_.squelch_level;
}
@ -340,6 +355,10 @@ void ReceiverModel::update_modulation() {
update_wfm_configuration();
break;
case Mode::WFMAudioAMApt:
update_wfmam_configuration();
break;
case Mode::SpectrumAnalysis:
case Mode::Capture:
break;
@ -362,6 +381,10 @@ void ReceiverModel::update_wfm_configuration() {
wfm_configs[wfm_configuration()].apply();
}
void ReceiverModel::update_wfmam_configuration() {
wfmam_configs[wfmam_configuration()].apply(); // update with different index for Wefax.
}
void ReceiverModel::update_antenna_bias() {
if (enabled_)
radio::set_antenna_bias(portapack::get_antenna_bias());

View file

@ -41,8 +41,9 @@ class ReceiverModel {
NarrowbandFMAudio = 1,
WidebandFMAudio = 2,
SpectrumAnalysis = 3,
AMAudioFMApt = 4, // Added to handle HF WeatherFax , SSB (USB demod) + Tone_Subcarrier FM demod
Capture = 5,
AMAudioFMApt = 4, // Added to handle HF WeatherFax , SSB (USB demod) + Tone_Subcarrier FM demod
WFMAudioAMApt = 5, // Added to handle SAT Weather map , NOAA 137 Mhz.
Capture = 6,
};
struct settings_t {
@ -56,6 +57,7 @@ class ReceiverModel {
Mode mode = Mode::NarrowbandFMAudio;
uint8_t am_config_index = 0;
uint8_t amfm_config_index = 0;
uint8_t wfmam_config_index = 0;
uint8_t nbfm_config_index = 0;
uint8_t wfm_config_index = 0;
uint8_t squelch_level = 80;
@ -98,6 +100,9 @@ class ReceiverModel {
uint8_t wfm_configuration() const;
void set_wfm_configuration(uint8_t n);
uint8_t wfmam_configuration() const;
void set_wfmam_configuration(uint8_t n);
uint8_t squelch_level() const;
void set_squelch_level(uint8_t v);
@ -151,6 +156,7 @@ class ReceiverModel {
void update_amfm_configuration();
void update_nbfm_configuration();
void update_wfm_configuration();
void update_wfmam_configuration();
void update_antenna_bias();
void update_headphone_volume();

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@ -52,6 +52,19 @@ void AudioOutput::write_unprocessed(const buffer_s16_t& audio) {
});
}
void AudioOutput::apt_write(const buffer_s16_t& audio) {
std::array<float, 32> audio_f;
for (size_t i = 0; i < audio.count; i++) {
cur = audio.p[i];
cur2 = cur * cur;
mag_am = sqrtf(prev2 + cur2 - (2 * prev * cur * cos_theta)) / sin_theta;
audio_f[i] = mag_am * ki; // normalize.
prev = cur;
prev2 = cur2;
}
write(buffer_f32_t{audio_f.data(), audio.count, audio.sampling_rate});
}
void AudioOutput::write(const buffer_s16_t& audio) {
std::array<float, 32> audio_f;
for (size_t i = 0; i < audio.count; i++) {
@ -72,8 +85,8 @@ void AudioOutput::on_block(const buffer_f32_t& audio) {
if (do_processing) {
const auto audio_present_now = squelch.execute(audio);
hpf.execute_in_place(audio); // IIRBiquadFilter name is "hpf", but we will call with "hpf-coef" for all except AMFM (WFAX) with "lpf-coef"
deemph.execute_in_place(audio);
hpf.execute_in_place(audio); // IIRBiquadFilter name is "hpf", but we will call with "hpf-coef" for all except AMFM (WFAX) with "lpf-coef" and notch for WFMAM (NOAA)
deemph.execute_in_place(audio); // IIRBiquadFilter name is "deemph", but we will call LPF de-emphasis or other LPF for WFAM (NOAA).
audio_present_history = (audio_present_history << 1) | (audio_present_now ? 1 : 0);
audio_present = (audio_present_history != 0);

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@ -46,6 +46,7 @@ class AudioOutput {
const float squelch_threshold = 0.0f);
void write_unprocessed(const buffer_s16_t& audio);
void apt_write(const buffer_s16_t& audio);
void write(const buffer_s16_t& audio);
void write(const buffer_f32_t& audio);
@ -58,6 +59,10 @@ class AudioOutput {
private:
static constexpr float k = 32768.0f;
static constexpr float ki = 1.0f / k;
static constexpr float cos_theta = 0.30901699437494742410f;
static constexpr float sin_theta = 0.95105651629515357212f;
float cur = 0.0f, cur2 = 0.0f, prev = 0.0f, prev2 = 0.0f, mag_am = 0.0f;
BlockDecimator<int16_t, 32> block_buffer_s16{1};
BlockDecimator<float, 32> block_buffer{1};

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@ -161,7 +161,7 @@ void WeFaxRx::configure(const WeFaxRxConfigureMessage& message) {
channel_filter_high_f = taps_2k6_usb_wefax_channel.high_frequency_normalized * channel_filter_input_fs;
channel_filter_transition = taps_2k6_usb_wefax_channel.transition_normalized * channel_filter_input_fs;
channel_spectrum.set_decimation_factor(1.0f);
audio_output.configure(audio_12k_lpf_1500hz_config); // hpf in all AM demod modes (AM-6K/9K, USB/LSB,DSB), except Wefax (lpf there).
audio_output.configure(apt_audio_12k_lpf_1500hz_config); // hpf in all AM demod modes (AM-6K/9K, USB/LSB,DSB), except Wefax (lpf there).
lpm = message.lpm;
ioc_mode = message.ioc;

View file

@ -47,23 +47,37 @@ void WidebandFMAudio::execute(const buffer_c8_t& buffer) {
channel_spectrum.feed(channel, channel_filter_low_f, channel_filter_high_f, channel_filter_transition);
}
/* 384kHz complex<int16_t>[256]
/* 384kHz complex<int16_t>[256] for wfm
* -> FM demodulation
* -> 384kHz int16_t[256] */
/* TODO: To improve adjacent channel rejection, implement complex channel filter:
* pass < +/- 100kHz, stop > +/- 200kHz
*/
auto audio_oversampled = demod.execute(channel, work_audio_buffer);
/* 96kHz complex<int16_t>[64] for wfmam NOAA
* -> FM demodulation
* -> 96kHz int16_t[64] */
/* 384kHz int16_t[256]
auto audio_oversampled = demod.execute(channel, work_audio_buffer); // fs 384khz wfm , 96khz wfmam for NOAA
/* 384kHz int16_t[256] for wfm
* -> 4th order CIC decimation by 2, gain of 1
* -> 192kHz int16_t[128] */
/* 96kHz int16_t[64] for wfam
* -> 4th order CIC decimation by 2, gain of 1
* -> 48kHz int16_t[32] */
auto audio_4fs = audio_dec_1.execute(audio_oversampled, work_audio_buffer);
/* 192kHz int16_t[128]
/* 192kHz int16_t[128] for wfm
* -> 4th order CIC decimation by 2, gain of 1
* -> 96kHz int16_t[64] */
/* 48kHz int16_t[32] for wfman
* -> 4th order CIC decimation by 2, gain of 1
* -> 24kHz int16_t[16] */
auto audio_2fs = audio_dec_2.execute(audio_4fs, work_audio_buffer);
// Input: 96kHz int16_t[64]
@ -118,13 +132,24 @@ void WidebandFMAudio::execute(const buffer_c8_t& buffer) {
break;
}
/* 96kHz int16_t[64]
/* 96kHz int16_t[64] for wfm
* -> FIR filter, <15kHz (0.156fs) pass, >19kHz (0.198fs) stop, gain of 1
* -> 48kHz int16_t[32] */
/* 24kHz int16_t[16] for wfmam
* -> FIR filter, <4.5kHz (0.1875fs) pass, >5.2kHz (0.2166fs) stop, gain of 1
* -> 12kHz int16_t[8] */
auto audio = audio_filter.execute(audio_2fs, work_audio_buffer);
/* -> 48kHz int16_t[32] */
audio_output.write(audio);
/* -> 48kHz int16_t[32] for wfm , */
/* -> 12kHz int16_t[8] for wfmam , */
if (decim_1.decimation_factor() == 2) {
audio_output.write(audio); // we are in original wfm , decim_1.decimation_factor == 2
} else {
audio_output.apt_write(audio); // we are in added wfmam (noaa), decim_1.decimation_factor == 8
}
}
void WidebandFMAudio::post_message(const buffer_c16_t& data) {
@ -142,7 +167,11 @@ void WidebandFMAudio::on_message(const Message* const message) {
break;
case Message::ID::WFMConfigure:
configure(*reinterpret_cast<const WFMConfigureMessage*>(message));
configure_wfm(*reinterpret_cast<const WFMConfigureMessage*>(message));
break;
case Message::ID::WFMAMConfigure:
configure_wfmam(*reinterpret_cast<const WFMAMConfigureMessage*>(message));
break;
case Message::ID::CaptureConfig:
@ -154,20 +183,56 @@ void WidebandFMAudio::on_message(const Message* const message) {
}
}
void WidebandFMAudio::configure(const WFMConfigureMessage& message) {
void WidebandFMAudio::configure_wfm(const WFMConfigureMessage& message) {
constexpr size_t decim_0_input_fs = baseband_fs;
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor;
constexpr size_t decim_1_input_fs = decim_0_output_fs;
constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor;
constexpr size_t demod_input_fs = decim_1_output_fs;
decim_0.configure(message.decim_0_filter.taps);
// decim_1.configure(message.decim_1_filter.taps); // Original .
// TODO dynamic decim1 , with decimation 2 / 8 and 16 x taps , / 32 taps .
// Temptatively , I splitted, in two WidebandFMAudio::configure_wfm / WidebandFMAudio::configure_wfmam and dynamically /2, /8 (here /2)
// decim_1.set<dsp::decimate::FIRC16xR16x16Decim2>().configure(message.decim_1_filter.taps); // for wfm
// decim_1.set<dsp::decimate::FIRC16xR16x32Decim8>().configure(taps_84k_wfmam_decim_1.taps); // for wfmam
decim_1.set<dsp::decimate::FIRC16xR16x16Decim2>().configure(message.decim_1_filter.taps); // for wfm
size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor(); // wfm , decim_1.decimation_factor() = /2 , if applied after the line : decim_1.set<dsp::decimate::FIRC16xR16x16Decim2>().configure(message.decim_1_filter.taps);
size_t demod_input_fs = decim_1_output_fs;
spectrum_interval_samples = decim_1_output_fs / spectrum_rate_hz;
spectrum_samples = 0;
channel_filter_low_f = message.decim_1_filter.low_frequency_normalized * decim_1_input_fs;
channel_filter_high_f = message.decim_1_filter.high_frequency_normalized * decim_1_input_fs;
channel_filter_transition = message.decim_1_filter.transition_normalized * decim_1_input_fs;
demod.configure(demod_input_fs, message.deviation);
audio_filter.configure(message.audio_filter.taps);
audio_output.configure(message.audio_hpf_config, message.audio_deemph_config);
channel_spectrum.set_decimation_factor(1);
configured = true;
}
void WidebandFMAudio::configure_wfmam(const WFMAMConfigureMessage& message) {
constexpr size_t decim_0_input_fs = baseband_fs;
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor;
constexpr size_t decim_1_input_fs = decim_0_output_fs;
decim_0.configure(message.decim_0_filter.taps);
decim_1.configure(message.decim_1_filter.taps);
// decim_1.configure(message.decim_1_filter.taps); // Original .
// TODO dynamic decim1 , with decimation 2 / 8 and 16 x taps , / 32 taps .
// Temptatively , I splitted, in two WidebandFMAudio::configure_wfm / WidebandFMAudio::configure_wfmam and dynamically /2, /8 . (here /8)
// decim_1.set<dsp::decimate::FIRC16xR16x16Decim2>().configure(message.decim_1_filter.taps); // for wfm
// decim_1.set<dsp::decimate::FIRC16xR16x32Decim8>().configure(message.decim_1_filter.taps); // for wfmam
decim_1.set<dsp::decimate::FIRC16xR16x32Decim8>().configure(message.decim_1_filter.taps); // for wfmam
size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor(); // wfmam, decim_1.decimation_factor() = /8 ,if applied after the line, decim_1.set<dsp::decimate::FIRC16xR16x16Decim2>().configure(message.decim_1_filter.taps);
size_t demod_input_fs = decim_1_output_fs;
spectrum_interval_samples = decim_1_output_fs / spectrum_rate_hz;
spectrum_samples = 0;
channel_filter_low_f = message.decim_1_filter.low_frequency_normalized * decim_1_input_fs;
channel_filter_high_f = message.decim_1_filter.high_frequency_normalized * decim_1_input_fs;
channel_filter_transition = message.decim_1_filter.transition_normalized * decim_1_input_fs;

View file

@ -35,6 +35,46 @@
#include "audio_output.hpp"
#include "spectrum_collector.hpp"
#include <array>
#include <memory>
#include <tuple>
#include <variant>
template <typename... Args>
class MultiDecimator {
public:
/* Dispatches to the underlying type's execute. */
template <typename Source, typename Destination>
Destination execute(
const Source& src,
const Destination& dst) {
return std::visit(
[&src, &dst](auto&& arg) -> Destination {
return arg.execute(src, dst);
},
decimator_);
}
size_t decimation_factor() const {
return std::visit(
[](auto&& arg) -> size_t {
return arg.decimation_factor;
},
decimator_);
}
/* Sets this decimator to a new instance of the specified decimator type.
* NB: The instance is returned by-ref so 'configure' can easily be called. */
template <typename Decimator>
Decimator& set() {
decimator_ = Decimator{};
return std::get<Decimator>(decimator_);
}
private:
std::variant<Args...> decimator_{};
};
class WidebandFMAudio : public BasebandProcessor {
public:
void execute(const buffer_c8_t& buffer) override;
@ -59,7 +99,16 @@ class WidebandFMAudio : public BasebandProcessor {
complex_audio.size()};
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0{};
dsp::decimate::FIRC16xR16x16Decim2 decim_1{};
// dsp::decimate::FIRC16xR16x16Decim2 decim_1{}; //original condition , before adding wfmam
// decim_1 will handle different types of FIR filters depending on selection.
MultiDecimator<
dsp::decimate::FIRC16xR16x16Decim2,
dsp::decimate::FIRC16xR16x32Decim8>
decim_1{};
// dsp::decimate::FIRC16xR16x32Decim8 decim_1{}; // For FMAM
int32_t channel_filter_low_f = 0;
int32_t channel_filter_high_f = 0;
int32_t channel_filter_transition = 0;
@ -94,7 +143,8 @@ class WidebandFMAudio : public BasebandProcessor {
BasebandThread baseband_thread{baseband_fs, this, baseband::Direction::Receive};
RSSIThread rssi_thread{};
void configure(const WFMConfigureMessage& message);
void configure_wfm(const WFMConfigureMessage& message);
void configure_wfmam(const WFMAMConfigureMessage& message);
void capture_config(const CaptureConfigMessage& message);
void post_message(const buffer_c16_t& data);
};

View file

@ -1325,6 +1325,128 @@ constexpr fir_taps_real<16> taps_40k_wfm_decim_1 = {
}},
};
// WFMAM decimation filters ////////////////////////////////////////////////
// Used for NOAA 137 Mhz APT sat demod.
// IFIR prototype filter: fs=768000, pass=42000, stop=95000, decim=8, fout=96000
constexpr fir_taps_real<32> taps_84k_wfmam_decim_1 = {
.low_frequency_normalized = -42000.0f / 768000.0f,
.high_frequency_normalized = 42000.0f / 768000.0f,
.transition_normalized = 53000.0f / 768000.0f,
.taps = {{
13,
-6,
-47,
-116,
-207,
-294,
-332,
-266,
-39,
386,
1012,
1795,
2648,
3452,
4079,
4423,
4423,
4079,
3452,
2648,
1795,
1012,
386,
-39,
-266,
-332,
-294,
-207,
-116,
-47,
-6,
13,
}},
};
/* 1st Wideband FM demod baseband filter of audio AM tones ,
to pass all DSB band of AM fsubcarrier 2.4Khz mod. with APT */
/* 24kHz int16_t input
* -> FIR filter, <4.5kHz (0.1875fs) pass, >5.2kHz (0.2166fs) stop
* -> 12kHz int16_t output, gain of 1.0 (I think).
* sum(abs(taps)): 125152 , before <125270>, very similar.
*/
constexpr fir_taps_real<64> taps_64_lp_1875_2166{
.low_frequency_normalized = -0.1875f,
.high_frequency_normalized = 0.1875f,
.transition_normalized = 0.03f,
.taps = {{
38,
-21,
-51,
-9,
77,
82,
-50,
-168,
-67,
190,
253,
-61,
-403,
-243,
356,
616,
15,
-814,
-671,
550,
1335,
334,
-1527,
-1689,
725,
2978,
1455,
-3277,
-5361,
830,
13781,
24549,
24549,
13781,
830,
-5361,
-3277,
1455,
2978,
725,
-1689,
-1527,
334,
1335,
550,
-671,
-814,
15,
616,
356,
-243,
-403,
-61,
253,
190,
-67,
-168,
-50,
82,
77,
-9,
-51,
-21,
38,
}},
};
// TPMS decimation filters ////////////////////////////////////////////////
// IFIR image-reject filter: fs=2457600, pass=100000, stop=407200, decim=4, fout=614400

View file

@ -56,8 +56,8 @@ constexpr iir_biquad_config_t audio_12k_hpf_300hz_config{
{1.00000000f, -1.77863178f, 0.80080265f}};
// scipy.signal.butter(2, 1500 / 6000.0, 'low', analog=False)
constexpr iir_biquad_config_t audio_12k_lpf_1500hz_config{
// Added to lpf the audio in wefax mode , before sending to SD card or spk.
constexpr iir_biquad_config_t apt_audio_12k_lpf_1500hz_config{
// Added to lpf the apt audio in wefax mode , before sending to SD card or spk.
{0.09763107f, 0.19526215f, 0.09763107f},
{1.00000000f, -0.94280904f, 0.33333333f}};
@ -108,4 +108,15 @@ constexpr iir_biquad_config_t audio_48k_deemph_2122_6_config{
{0.12264116f, 0.12264116f, 0.00000000f},
{1.00000000f, -0.75471767f, 0.00000000f}};
// scipy.signal.iirnotch(f0, Q, fs) = signal.iirnotch(2400, 15, 12000)
constexpr iir_biquad_config_t apt_audio_12k_notch_2k4_config{
{0.95977357f, -0.59317269f, 0.95977357f},
{1.00000000f, -0.59317269f, 0.91954714f}};
// scipy.signal.butter(2, 2000 / 6000.0, 'low', analog=False)
constexpr iir_biquad_config_t apt_audio_12k_lpf_2000hz_config{
// Added to lpf the apt audio in NOAA mode , before sending to SD card or spk.
{0.15505103f, 0.31010205f, 0.15505103f},
{1.00000000f, -0.6202041f, 0.24040821f}};
#endif /*__DSP_IIR_CONFIG_H__*/

View file

@ -130,7 +130,7 @@ class Message {
WeFaxRxConfigure = 73,
WeFaxRxStatusData = 74,
WeFaxRxImageData = 75,
WFMAMConfigure = 76,
MAX
};
@ -584,6 +584,32 @@ class WFMConfigureMessage : public Message {
const iir_biquad_config_t audio_deemph_config;
};
class WFMAMConfigureMessage : public Message {
public:
constexpr WFMAMConfigureMessage(
const fir_taps_real<24> decim_0_filter,
const fir_taps_real<32> decim_1_filter,
const fir_taps_real<64> audio_filter,
const size_t deviation,
const iir_biquad_config_t audio_hpf_config,
const iir_biquad_config_t audio_deemph_config)
: Message{ID::WFMAMConfigure},
decim_0_filter(decim_0_filter),
decim_1_filter(decim_1_filter),
audio_filter(audio_filter),
deviation{deviation},
audio_hpf_config(audio_hpf_config),
audio_deemph_config(audio_deemph_config) {
}
const fir_taps_real<24> decim_0_filter;
const fir_taps_real<32> decim_1_filter;
const fir_taps_real<64> audio_filter;
const size_t deviation;
const iir_biquad_config_t audio_hpf_config;
const iir_biquad_config_t audio_deemph_config;
};
class AMConfigureMessage : public Message {
public:
enum class Modulation : int32_t {