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Adding_BPF_selection_to_the_NOAA_APT_signal (#2675)

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* Adding_BPF_selection_to_the_NOAA_APT_signal
* comments, spell mistake .
This commit is contained in:
Brumi-2021
2025-06-02 14:40:13 +02:00
committed by GitHub
parent 6e9ecf8e7b
commit 695e6d19f4
6 changed files with 33 additions and 10 deletions
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2
firmware/application/apps/analog_audio_app.hpp
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@@ -143,7 +143,7 @@ class WFMAMAptOptionsView : public View {
};
OptionsField options_config{
{3 * 8, 0 * 16},
16, // Max option char length "80khz (NOAA Apt)" example.
19, // Max option char length "80k-NOAA Apt LPF-2K" , example.
{
// Using common messages from freqman_ui.cpp
}};

8
firmware/application/baseband_api.cpp
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@@ -105,10 +105,10 @@ void WFMConfig::apply() const {
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.
decim_0, // Fixed 24 taps array : taps_16k0_decim_0
decim_1, // Dynamic 32 taps array : taps_80k_wfmam_decim_1, 38k_wfmam
taps_64_lp_bpf, // Dynamic 64 taps array , to filter modulated DSB AM 2k4 carrier before demod. AM .(LPF / BPF)
17000, // NOAA satellite tx , FM deviation = +-17Khz.
apt_audio_12k_notch_2k4_config,
apt_audio_12k_lpf_2000hz_config};
send_message(&message);

1
firmware/application/baseband_api.hpp
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@@ -65,6 +65,7 @@ struct WFMConfig {
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;
const fir_taps_real<64> taps_64_lp_bpf; // to handle dynamically LPF / BPF .
void apply() const;
};

5
firmware/application/freqman_db.cpp
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@@ -108,8 +108,9 @@ options_t freqman_bandwidths[6] = {
},
{
// WFMAM for NOAA satellites, 137 Mhz band
{"80kHz (NOAA Apt)", 0}, // Fixed RX demod- WFM config Index 1 : FM+AM for Audio NOAA APT ones.
{"38kHz (NOAA Apt)", 1},
{"80k-NOAA Apt LPF-2K", 0},
{"38k-NOAA Apt LPF-2K", 1},
{"38k-NOAA Apt BPF-2K", 2}, // Symetrical BPF centred to the 2k4 AM subcarrier, BW = 2KHz
},
};

7
firmware/application/receiver_model.cpp
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@@ -69,9 +69,10 @@ static constexpr std::array<baseband::WFMConfig, 3> wfm_configs{{
{taps_80k_wfm_decim_0, taps_80k_wfm_decim_1},
}};
static constexpr std::array<baseband::WFMAMConfig, 2> wfmam_configs{{
{taps_16k0_decim_0, taps_80k_wfmam_decim_1},
{taps_16k0_decim_0, taps_38k_wfmam_decim_1},
static constexpr std::array<baseband::WFMAMConfig, 3> wfmam_configs{{
{taps_16k0_decim_0, taps_80k_wfmam_decim_1, taps_64_lp_1875_2166},
{taps_16k0_decim_0, taps_38k_wfmam_decim_1, taps_64_lp_1875_2166},
{taps_16k0_decim_0, taps_38k_wfmam_decim_1, taps_64_bpf_2k4_bw_2k},
}};
} /* namespace */