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* dynamic noise floor sampling

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This commit is contained in:
Scott Powell 2025-05-25 21:44:15 +10:00
parent f2243b78ae
commit 0e35ae5ec6
4 changed files with 33 additions and 5 deletions
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18
src/helpers/RadioLibWrappers.cpp
View file

@ -35,7 +35,7 @@ void RadioLibWrapper::begin() {
setFlag(); // LoRa packet is already received
}
_noise_floor = -140;
_noise_floor = 0;
// start average out some samples
_num_floor_samples = 0;
@ -47,13 +47,23 @@ void RadioLibWrapper::idle() {
state = STATE_IDLE; // need another startReceive()
}
void RadioLibWrapper::triggerNoiseFloorCalibrate() {
if (_num_floor_samples >= NUM_NOISE_FLOOR_SAMPLES) { // ignore trigger if currently sampling
_num_floor_samples = 0;
_floor_sample_sum = 0;
}
}
void RadioLibWrapper::loop() {
if (state == STATE_RX && _num_floor_samples < NUM_NOISE_FLOOR_SAMPLES) {
if (!isReceivingPacket()) {
_num_floor_samples++;
_floor_sample_sum += getCurrentRSSI();
int rssi = getCurrentRSSI();
if (rssi < _noise_floor + INTERFERENCE_THRESHOLD_DB) { // only consider samples below current floor+THRESHOLD
_num_floor_samples++;
_floor_sample_sum += rssi;
}
}
} else if (_floor_sample_sum != 0) {
} else if (_num_floor_samples >= NUM_NOISE_FLOOR_SAMPLES && _floor_sample_sum != 0) {
_noise_floor = _floor_sample_sum / NUM_NOISE_FLOOR_SAMPLES;
_floor_sample_sum = 0;

6
src/helpers/RadioLibWrappers.h
View file

@ -16,7 +16,6 @@ protected:
void startRecv();
float packetScoreInt(float snr, int sf, int packet_len);
virtual bool isReceivingPacket() =0;
virtual float getCurrentRSSI() =0;
public:
RadioLibWrapper(PhysicalLayer& radio, mesh::MainBoard& board) : _radio(&radio), _board(&board) { n_recv = n_sent = 0; }
@ -36,6 +35,11 @@ public:
return isChannelActive();
}
virtual float getCurrentRSSI() =0;
int getNoiseFloor() const override { return _noise_floor; }
void triggerNoiseFloorCalibrate() override;
void loop() override;
uint32_t getPacketsRecv() const { return n_recv; }