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[fix](trx-rs): correct FT2 sync phase progression

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This commit is contained in:
Stan Grams
2026-03-14 20:46:42 +01:00
parent d3abce9ab0
commit 3c538d5712
1 changed files with 2 additions and 2 deletions
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src/decoders/trx-ft8/src/ft8_wrapper.c
+2 -2
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@@ -342,7 +342,7 @@ static void ft2_prepare_sync_waveforms(float complex sync_wave[4][64], float com
for (int tone_idx = 0; tone_idx < 4; ++tone_idx) for (int tone_idx = 0; tone_idx < 4; ++tone_idx)
{ {
int tone = kFT4_Costas_pattern[group][tone_idx]; int tone = kFT4_Costas_pattern[group][tone_idx];
float dphase = 2.0f * (float)M_PI * tone / nss; float dphase = 4.0f * (float)M_PI * tone / nss;
for (int step = 0; step < (int)(nss / 2.0f); ++step) for (int step = 0; step < (int)(nss / 2.0f); ++step)
{ {
sync_wave[group][idx++] = cexpf(I * phase); sync_wave[group][idx++] = cexpf(I * phase);
@@ -355,7 +355,7 @@ static void ft2_prepare_sync_waveforms(float complex sync_wave[4][64], float com
{ {
for (int n = 0; n < 64; ++n) for (int n = 0; n < 64; ++n)
{ {
float phase = 2.0f * (float)M_PI * idf * n / fs_down; float phase = 4.0f * (float)M_PI * idf * n / fs_down;
tweak_wave[idf - FT2_SYNC_TWEAK_MIN][n] = cexpf(I * phase); tweak_wave[idf - FT2_SYNC_TWEAK_MIN][n] = cexpf(I * phase);
} }
} }