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fsk: do not consider the stop bit twice

This commit is contained in:
Kamal Mostafa 2011-07-08 13:00:50 -07:00
parent 9efb04cb8c
commit bca34371e1
1 changed files with 9 additions and 1 deletions
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10
src/fsk.c
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@ -215,7 +215,13 @@ fsk_frame_analyze( fsk_plan *fskp, float *samples, float samples_per_bit,
} }
/* compute average bit strength 'v' */ /* compute average bit strength 'v' */
#if 1 /* don't consider the stop bit -- we'll look at it next time around */
float p_str = bit_strengths[fskp->n_data_bits + 2];
v -= p_str;
v /= (n_bits-1);
#else
v /= n_bits; v /= n_bits;
#endif
// #define FSK_MIN_STRENGTH 0.005 // #define FSK_MIN_STRENGTH 0.005
#ifdef FSK_MIN_STRENGTH #ifdef FSK_MIN_STRENGTH
@ -227,7 +233,9 @@ fsk_frame_analyze( fsk_plan *fskp, float *samples, float samples_per_bit,
float worst_divergence = 0; float worst_divergence = 0;
int i; int i;
for ( i=0; i<n_bits; i++ ) { /* nbits-1: don't consider the stop bit */
for ( i=0; i<n_bits-1; i++ )
{
float normalized_bit_str = bit_strengths[i] / v; float normalized_bit_str = bit_strengths[i] / v;
float divergence = fabs(1.0 - normalized_bit_str); float divergence = fabs(1.0 - normalized_bit_str);
if ( worst_divergence < divergence ) if ( worst_divergence < divergence )