diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib/gsm_receiver_cf.cc | 43 |
1 files changed, 5 insertions, 38 deletions
diff --git a/src/lib/gsm_receiver_cf.cc b/src/lib/gsm_receiver_cf.cc index b58b108..c47e111 100644 --- a/src/lib/gsm_receiver_cf.cc +++ b/src/lib/gsm_receiver_cf.cc @@ -73,9 +73,6 @@ gsm_receiver_cf::gsm_receiver_cf(gr_feval_dd *tuner, int osr) d_freq_offset(0), d_state(first_fcch_search), d_burst_nr(osr) -// d_fcch_count(0), //!! -// d_x_temp(0),//!! -// d_x2_temp(0)//!! { int i; gmsk_mapper(SYNC_BITS, N_SYNC_BITS, d_sch_training_seq, gr_complex(0.0,-1.0)); @@ -208,23 +205,15 @@ gsm_receiver_cf::general_work(int noutput_items, break; case normal_burst: -// std::cout << "# name: norm_complex\n" ; -// std::cout << "# type: complex matrix\n" ; -// std::cout << "# rows: 1\n" ; -// std::cout << "# columns: " << floor(d_OSR*(TS_BITS+GUARD_PERIOD)) << "\n"; burst_start = get_norm_chan_imp_resp(in, chan_imp_resp, TRAIN_SEARCH_RANGE); -// std::cout << burst_start << "\n" ; detect_burst(in, &d_channel_imp_resp[0], burst_start, output_binary); // printf("burst = [ "); // - for (int i = 0; i < BURST_SIZE ; i++) { - printf(" %d", output_binary[i]); - } - printf("];\n"); -// -// for(int i=0; i<floor(d_OSR*(TS_BITS+GUARD_PERIOD)); i++){ -// std::cout << in[i] << "\n"; +// for (int i = 0; i < BURST_SIZE ; i++) { +// printf(" %d", output_binary[i]); // } +// printf("];\n"); + break; case rach_burst: @@ -380,18 +369,8 @@ bool gsm_receiver_cf::find_fcch_burst(const gr_complex *in, const int nitems) double gsm_receiver_cf::compute_freq_offset(double best_sum, unsigned denominator) { float phase_offset, freq_offset; - phase_offset = best_sum / denominator; freq_offset = phase_offset * 1625000.0 / (12.0 * M_PI); - -// d_fcch_count++; -// d_x_temp += freq_offset; -// d_x2_temp += freq_offset * freq_offset; -// d_mean = d_x_temp / d_fcch_count; - -// DCOUT("freq_offset: " << freq_offset); //" best_sum: " << best_sum -// DCOUT("wariance: " << sqrt((d_x2_temp / d_fcch_count - d_mean * d_mean)) << " fcch_count:" << d_fcch_count << " d_mean: " << d_mean); - return freq_offset; } @@ -413,10 +392,6 @@ bool gsm_receiver_cf::find_sch_burst(const gr_complex *in, const int nitems , fl bool result = false; int sample_nr_near_sch_start = d_fcch_start_pos + (FRAME_BITS - SAFETY_MARGIN) * d_OSR; -// vector_complex correlation_buffer; -// vector_float power_buffer; -// vector_float window_energy_buffer; - enum states { start, reach_sch, search_not_finished, sch_found } sch_search_state; @@ -621,20 +596,13 @@ int gsm_receiver_cf::get_norm_chan_imp_resp(const gr_complex *in, gr_complex * c int chan_imp_resp_center; float max_correlation = 0; float energy = 0; + int search_start_pos = floor((TRAIN_POS + GUARD_PERIOD) * d_OSR); int search_stop_pos = search_start_pos + search_range * d_OSR; -// std::cout << "# name: correlation\n" ; -// std::cout << "# type: complex matrix\n" ; -// std::cout << "# rows: 1\n" ; -// std::cout << "# columns: " << (search_stop_pos - search_start_pos) << "\n"; - for (int ii = search_start_pos; ii < search_stop_pos; ii++) { -// for (int ii = SYNC_POS * d_OSR; ii < (SYNC_POS + SYNC_SEARCH_RANGE) *d_OSR; ii++) { -// for (int ii = 1; ii < (150) *d_OSR; ii++) { gr_complex correlation = correlate_sequence(&d_norm_training_seq[d_bcc][5], &in[ii], N_TRAIN_BITS - 10); -// std::cout << correlation << "\n" ; correlation_buffer.push_back(correlation); power_buffer.push_back(pow(abs(correlation), 2)); } @@ -657,7 +625,6 @@ int gsm_receiver_cf::get_norm_chan_imp_resp(const gr_complex *in, gr_complex * c break; } iter++; -// std::cout << energy << "\n"; window_energy_buffer.push_back(energy); } |