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removed void detect_norm_burst(const gr_complex * in, gr_complex * chan_imp_resp, int burst_start, unsigned char * output_binary);

This commit is contained in:
piotr 2009-06-04 13:18:56 +02:00
parent 6497de667a
commit 99e4a46c9a
2 changed files with 0 additions and 43 deletions
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41
src/lib/gsm_receiver_cf.cc
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@ -695,44 +695,3 @@ int gsm_receiver_cf::get_norm_chan_imp_resp(const gr_complex *in, gr_complex * c
burst_start = search_start_pos + strongest_window_nr + chan_imp_resp_center - 66 * d_OSR - 2 * d_OSR + 2;
return burst_start;
}
void gsm_receiver_cf::detect_norm_burst(const gr_complex * in, gr_complex * chan_imp_resp, int burst_start, unsigned char * output_binary)
{
float output[BURST_SIZE];
gr_complex rhh_temp[CHAN_IMP_RESP_LENGTH*d_OSR];
gr_complex rhh[CHAN_IMP_RESP_LENGTH];
gr_complex filtered_burst[BURST_SIZE];
int start_state = 3;
unsigned int stop_states[2] = {4, 12};
autocorrelation(chan_imp_resp, rhh_temp, d_chan_imp_length*d_OSR);
for (int ii = 0; ii < (d_chan_imp_length); ii++) {
rhh[ii] = conj(rhh_temp[ii*d_OSR]);
}
mafi_norm(&in[burst_start], BURST_SIZE, chan_imp_resp, d_chan_imp_length*d_OSR, filtered_burst);
viterbi_detector(filtered_burst, BURST_SIZE, rhh, start_state, stop_states, 2, output);
for (int i = 0; i < BURST_SIZE ; i++) {
output_binary[i] = (output[i] > 0);
}
}
inline void gsm_receiver_cf::mafi_norm(const gr_complex * input, int input_length, gr_complex * filter, int filter_length, gr_complex * output)
{
int ii = 0, n, a;
for (n = 0; n < input_length; n++) {
a = n * d_OSR;
output[n] = 0;
ii = 0;
while (ii < filter_length) {
if ((a + ii) >= input_length*d_OSR)
break;
output[n] += input[a+ii] * filter[ii]; //!!conj
ii++;
}
}
}

2
src/lib/gsm_receiver_cf.h
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@ -290,8 +290,6 @@ class gsm_receiver_cf : public gr_block
inline void autocorrelation(const gr_complex * input, gr_complex * out, int length);
inline void mafi(const gr_complex * input, int input_length, gr_complex * filter, int filter_length, gr_complex * output);
int get_norm_chan_imp_resp(const gr_complex *in, gr_complex * chan_imp_resp, unsigned search_range);
void detect_norm_burst(const gr_complex * in, gr_complex * chan_imp_resp, int burst_start, unsigned char * output_binary);
inline void mafi_norm(const gr_complex * input, int input_length, gr_complex * filter, int filter_length, gr_complex * output);
public:
~gsm_receiver_cf();