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Move comment about FM squelch IIR filter.

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This commit is contained in:
Jared Boone 2015-12-28 16:24:43 -08:00
parent ef7aeaafa9
commit 7ec1a1f85b
2 changed files with 1 additions and 2 deletions
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1
firmware/baseband/dsp_iir_config.hpp
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@ -30,6 +30,7 @@ constexpr iir_biquad_config_t audio_hpf_config {
{ 1.00000000f, -1.94447766f, 0.94597794f, } { 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 { constexpr iir_biquad_config_t non_audio_hpf_config {
{ 0.51891061f, -0.95714180f, 0.51891061f }, { 0.51891061f, -0.95714180f, 0.51891061f },
{ 1.0f , -0.79878302f, 0.43960231f } { 1.0f , -0.79878302f, 0.43960231f }

2
firmware/baseband/dsp_squelch.hpp
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@ -37,8 +37,6 @@ private:
static constexpr size_t N = 32; static constexpr size_t N = 32;
static constexpr int16_t threshold = 3072; static constexpr int16_t threshold = 3072;
// nyquist = 48000 / 2.0
// scipy.signal.iirdesign(wp=8000 / nyquist, ws= 4000 / nyquist, gpass=1, gstop=18, ftype='ellip')
IIRBiquadFilter non_audio_hpf { non_audio_hpf_config }; IIRBiquadFilter non_audio_hpf { non_audio_hpf_config };
}; };