portapack-mayhem/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2026-09-12 01:29:29 +00:00
Code Issues Packages Projects Releases 10 Wiki Activity

Use IFIR decimation for broadcast FM receiver.

Browse Source
This commit is contained in:
Jared Boone
2016-01-02 10:35:23 -08:00
parent a02bfe55d0
commit e720bfb054
5 changed files with 67 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files
firmware/baseband/proc_wfm_audio.hpp
+6 -8
View File
@@ -33,21 +33,19 @@
class WidebandFMAudio : public BasebandProcessor {
public:
WidebandFMAudio() {
decimator.set_decimation_factor(ChannelDecimator::DecimationFactor::By4);
}
WidebandFMAudio();
void execute(const buffer_c8_t& buffer) override;
private:
ChannelDecimator decimator;
std::array<complex16_t, 512> dst;
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0;
dsp::decimate::FIRC16xR16x16Decim2 decim_1;
dsp::demodulate::FM demod { 768000, 75000 };
dsp::demodulate::FM demod;
dsp::decimate::DecimateBy2CIC4Real audio_dec_1;
dsp::decimate::DecimateBy2CIC4Real audio_dec_2;
dsp::decimate::DecimateBy2CIC4Real audio_dec_3;
const fir_taps_real<64>& audio_filter_taps = taps_64_lp_156_198;
dsp::decimate::FIR64AndDecimateBy2Real audio_filter { audio_filter_taps.taps };
dsp::decimate::FIR64AndDecimateBy2Real audio_filter;
IIRBiquadFilter audio_hpf { audio_hpf_30hz_config };
IIRBiquadFilter audio_deemph { audio_deemph_2122_6_config };