diff options
Diffstat (limited to 'gascop.c')
| -rw-r--r-- | gascop.c | 11 |
1 files changed, 6 insertions, 5 deletions
@@ -235,7 +235,7 @@ int main(int argc, char **argv) { uint32_t j; int i, q; - int nph, ph = 4; /* anything higher than 3 */ + double nph, ph = 3; /* anything higher than 3 */ int ph_len = 0; @@ -255,12 +255,13 @@ int main(int argc, char **argv) { q = Gascop.data[j+1] - 127; /* Compute the instantaneous phase of the next IQ sample */ - nph = atan2(q, i); + /* But take the two point moving average to smooth the signal */ + nph = (atan2(q, i) / 2) + (ph / 2); - /* Check if we have completed a full circle by jumping phase, usually -2/-3 -> 2/3 */ + /* Check if we have completed a full circle by jumping phase */ /* Also add a high pass filter, anything less than 30 is noise */ - if ((nph - ph > 3) && (ph_len > 30)) { - /* printf("Phase jump from %4d to %4d after %4d samples\n", ph, nph, ph_len); */ + if ((ph < 0) && (nph > 0) && (ph_len > 30)) { + /* printf("Phase jump from %4f to %4f after %4d samples\n", ph, nph, ph_len); */ printf("%d,", ph_len); ph_len = 0; } |