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Oversample capturing for low bandwidths (#1332)

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* draft_low_bit_rate_solution_Capture_App

* second_draft_dynamic_decim

* Add support for Oversample Rate to capture.

---------

Co-authored-by: Brumi-2021 <ea3hqj@gmail.com>
This commit is contained in:
Kyle Reed
2023-07-31 08:46:07 -07:00
committed by GitHub
parent a24b3ad3de
commit d24ff7b3bc
10 changed files with 132 additions and 43 deletions
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15
firmware/baseband/proc_capture.hpp
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@@ -50,7 +50,13 @@ class CaptureProcessor : public BasebandProcessor {
dst.data(),
dst.size()};
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0{};
/* NB: There are two decimation passes: 0 and 1. In pass 0, one of
* the following will be selected based on the oversample rate.
* use decim_0_4 for an overall decimation factor of 8.
* use decim_0_8 for an overall decimation factor of 16. */
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0_4{};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0_8{};
dsp::decimate::FIRC16xR16x16Decim2 decim_1{};
int32_t channel_filter_low_f = 0;
int32_t channel_filter_high_f = 0;
@@ -61,14 +67,19 @@ class CaptureProcessor : public BasebandProcessor {
SpectrumCollector channel_spectrum{};
size_t spectrum_interval_samples = 0;
size_t spectrum_samples = 0;
OversampleRate oversample_rate{OversampleRate::Rate8x};
/* NB: Threads should be the last members in the class definition. */
BasebandThread baseband_thread{
baseband_fs, this, baseband::Direction::Receive, /*auto_start*/ false};
RSSIThread rssi_thread{};
void samplerate_config(const SamplerateConfigMessage& message);
/* Called to update members when the sample rate or oversample rate is changed. */
void update_for_rate_change();
void capture_config(const CaptureConfigMessage& message);
/* Dispatch to the correct decim_0 based on oversample rate. */
buffer_c16_t decim_0_execute(const buffer_c8_t& src, const buffer_c16_t& dst);
};
#endif /*__PROC_CAPTURE_HPP__*/