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[fix](trx-rds): tune acquisition speed vs false-positive tradeoff

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- Increase phase candidates 4 -> 16 for faster clock-phase lock
- Lower MIN_PUBLISH_QUALITY 0.65 -> 0.55 for earlier decode on weaker signals

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
This commit is contained in:
Stan Grams
2026-03-26 23:36:45 +01:00
parent 32e090f927
commit 032ff2a735
1 changed files with 2 additions and 2 deletions
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src/decoders/trx-rds/src/lib.rs
+2 -2
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@@ -12,10 +12,10 @@ const RDS_SYMBOL_RATE: f32 = 1_187.5;
const RDS_CHIP_RATE: f32 = RDS_SYMBOL_RATE * 2.0;
const RDS_POLY: u16 = 0x1B9;
const SEARCH_REG_MASK: u32 = (1 << 26) - 1;
const PHASE_CANDIDATES: usize = 4;
const PHASE_CANDIDATES: usize = 16;
const BIPHASE_CLOCK_WINDOW: usize = 128;
/// Minimum quality score to publish RDS state to the outer decoder.
const MIN_PUBLISH_QUALITY: f32 = 0.65;
const MIN_PUBLISH_QUALITY: f32 = 0.55;
/// Tech 6: number of Block A observations before using accumulated PI.
const PI_ACC_THRESHOLD: u8 = 3;
/// Tech 5 — Costas loop proportional gain (per sample).