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More tweaking to try to get the signal / CPU tradeoff right.

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This commit is contained in:
Oliver Jowett 2014-09-30 00:19:05 +01:00
parent dcae71faa8
commit 93e1b9e10d
1 changed files with 2 additions and 2 deletions
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4
mode_s.c
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@ -2041,7 +2041,7 @@ static inline int correlate_check_4(uint16_t *m) {
static int best_phase(uint16_t *m) { static int best_phase(uint16_t *m) {
int test; int test;
int best = -1; int best = -1;
int bestval = 10000; // minimum correlation quality we will accept int bestval = (m[0] + m[1] + m[2] + m[3] + m[4] + m[5]); // minimum correlation quality we will accept
// empirical testing suggests that 4..8 is the best range to test for here // empirical testing suggests that 4..8 is the best range to test for here
// (testing a wider range runs the danger of picking the wrong phase for // (testing a wider range runs the danger of picking the wrong phase for
@ -2156,7 +2156,7 @@ void detectModeS_oversample(uint16_t *m, uint32_t mlen) {
} }
// Check for enough signal // Check for enough signal
if (sigLevel < 2 * noiseLevel) if (sigLevel * 2 < 3 * noiseLevel) // about 3.5dB SNR
continue; continue;
// Check that the "quiet" bits 6,7,15,16,17 are actually quiet // Check that the "quiet" bits 6,7,15,16,17 are actually quiet