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furrtek
2016-01-31 09:34:24 +01:00
parent 29ec87a9ad
commit 44638e504b
166 changed files with 8700 additions and 3967 deletions
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firmware/baseband/dsp_iir_config.hpp
+26 -3
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@@ -24,14 +24,37 @@
#include "dsp_iir.hpp"
constexpr iir_biquad_config_t audio_hpf_config {
{ 0.93346032f, -1.86687724f, 0.93346032f },
{ 1.0f , -1.97730264f, 0.97773668f }
// scipy.signal.butter(2, 30 / 24000.0, 'highpass', analog=False)
constexpr iir_biquad_config_t audio_hpf_30hz_config {
{ 0.99722705f, -1.99445410f, 0.99722705f },
{ 1.00000000f, -1.99444641f, 0.99446179f }
};
// scipy.signal.butter(2, 300 / 24000.0, 'highpass', analog=False)
constexpr iir_biquad_config_t audio_hpf_300hz_config {
{ 0.97261390f, -1.94522780f, 0.97261390f },
{ 1.00000000f, -1.94447766f, 0.94597794f }
};
// scipy.signal.iirdesign(wp=8000 / 24000.0, ws= 4000 / 24000.0, gpass=1, gstop=18, ftype='ellip')
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 }
};
// 75us RC time constant, used in broadcast FM in Americas, South Korea
// scipy.signal.butter(1, 2122 / 24000.0, 'lowpass', analog=False)
// NOTE: Technically, order-1 filter, b[2] = a[2] = 0.
constexpr iir_biquad_config_t audio_deemph_2122_6_config {
{ 0.12264116f, 0.12264116f, 0.00000000f },
{ 1.00000000f, -0.75471767f, 0.00000000f }
};
#endif/*__DSP_IIR_CONFIG_H__*/