portapack-mayhem/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2026-09-13 10:09:30 +00:00
Code Issues Packages Projects Releases 10 Wiki Activity

Rebake of AM, NFM demodulators -- more flexible filtering/configuration.

Browse Source 
Also make SpectrumCollector dynamically configurable.
Add deemphasis filter to NFM.
This commit is contained in:
Jared Boone
2015-12-29 10:58:53 -08:00
parent df593c2f0f
commit bbfcca8ec0
8 changed files with 249 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files
firmware/baseband/dsp_iir_config.hpp
+6
View File
@@ -34,6 +34,12 @@ constexpr iir_biquad_config_t audio_hpf_config {
constexpr iir_biquad_config_t non_audio_hpf_config {
{ 0.51891061f, -0.95714180f, 0.51891061f },
{ 1.0f , -0.79878302f, 0.43960231f }
// scipy.signal.butter(1, 300 / 24000.0, 'lowpass', analog=False)
// NOTE: Technically, order-1 filter, b[2] = a[2] = 0.
constexpr iir_biquad_config_t audio_deemph_300_6_config {
{ 0.01925927f, 0.01925927f, 0.00000000f, },
{ 1.00000000f, -0.96148145f, 0.00000000f, },
};
#endif/*__DSP_IIR_CONFIG_H__*/