sjg/trx-rs
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[fix](trx-vdes): lower burst detector thresholds

Browse Source 
Reduce the VDES burst detector trigger and sustain thresholds so weaker received bursts enter and finalize more readily instead of being ignored by the IQ-side detector.

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>
This commit is contained in:
Stan Grams
2026-03-03 01:04:14 +01:00
parent 9fe293e056
commit c6af684d6c
1 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/decoders/trx-vdes/src/lib.rs
+6 -2
View File
@@ -35,6 +35,10 @@ const TER_MCS1_100_SYNC_BITS: &[u8; TER_MCS1_100_SYNC_SYMBOLS] = b"1111110011010
const PI4_QPSK_DIBITS: [u8; 4] = [0b00, 0b01, 0b11, 0b10]; const PI4_QPSK_DIBITS: [u8; 4] = [0b00, 0b01, 0b11, 0b10];
const MIN_SYNC_CANDIDATE_SCORE: f32 = 0.20; const MIN_SYNC_CANDIDATE_SCORE: f32 = 0.20;
const MIN_SYNC_PARSE_SCORE: f32 = 0.50; const MIN_SYNC_PARSE_SCORE: f32 = 0.50;
const BURST_TRIGGER_NOISE_MULT: f32 = 4.0;
const BURST_TRIGGER_FLOOR: f32 = 8.0e-5;
const BURST_SUSTAIN_NOISE_MULT: f32 = 1.5;
const BURST_SUSTAIN_FLOOR: f32 = 5.0e-5;
#[derive(Debug, Clone)] #[derive(Debug, Clone)]
pub struct VdesDecoder { pub struct VdesDecoder {
@@ -74,7 +78,7 @@ impl VdesDecoder {
let power = sample.norm_sqr(); let power = sample.norm_sqr();
if !self.in_burst { if !self.in_burst {
self.noise_floor = 0.995 * self.noise_floor + 0.005 * power; self.noise_floor = 0.995 * self.noise_floor + 0.005 * power;
let trigger = (self.noise_floor * 8.0).max(2.0e-4); let trigger = (self.noise_floor * BURST_TRIGGER_NOISE_MULT).max(BURST_TRIGGER_FLOOR);
if power >= trigger { if power >= trigger {
self.in_burst = true; self.in_burst = true;
self.quiet_run = 0; self.quiet_run = 0;
@@ -85,7 +89,7 @@ impl VdesDecoder {
} }
self.burst_samples.push(sample); self.burst_samples.push(sample);
let sustain = (self.noise_floor * 3.0).max(1.2e-4); let sustain = (self.noise_floor * BURST_SUSTAIN_NOISE_MULT).max(BURST_SUSTAIN_FLOOR);
if power < sustain { if power < sustain {
self.quiet_run = self.quiet_run.saturating_add(1); self.quiet_run = self.quiet_run.saturating_add(1);
} else { } else {