diff options
Diffstat (limited to 'src/lib/gsm_receiver_cf.h')
| -rw-r--r-- | src/lib/gsm_receiver_cf.h | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/src/lib/gsm_receiver_cf.h b/src/lib/gsm_receiver_cf.h index 2012325..0e287c5 100644 --- a/src/lib/gsm_receiver_cf.h +++ b/src/lib/gsm_receiver_cf.h @@ -26,6 +26,8 @@ #include <gr_complex.h> #include <gr_feval.h> #include <boost/circular_buffer.hpp> +#include <gsm_constants.h> + class gsm_receiver_cf; @@ -51,7 +53,7 @@ typedef boost::circular_buffer<float> circular_buffer_float; * constructor is private. howto_make_square_ff is the public * interface for creating new instances. */ -gsm_receiver_cf_sptr gsm_make_receiver_cf( gr_feval_dd *tuner, int osr ); +gsm_receiver_cf_sptr gsm_make_receiver_cf(gr_feval_dd *tuner, int osr); /*! * \brief Receives fcch @@ -64,34 +66,38 @@ class gsm_receiver_cf : public gr_block private: gr_feval_dd *d_tuner; - const int d_osr; + const int d_OSR; int d_counter; + int d_fcch_start_pos; float d_prev_freq_offset; circular_buffer_float d_phase_diff_buffer; double d_x_temp, d_x2_temp, d_mean; int d_fcch_count; double d_best_sum; - - enum states - { + gr_complex d_sch_training_seq[N_SYNC_BITS]; //encoded training sequence of a SCH burst + + + enum states { fcch_search, sch_search } d_state; - friend gsm_receiver_cf_sptr gsm_make_receiver_cf( gr_feval_dd *tuner, int osr ); - gsm_receiver_cf( gr_feval_dd *tuner, int osr ); + friend gsm_receiver_cf_sptr gsm_make_receiver_cf(gr_feval_dd *tuner, int osr); + gsm_receiver_cf(gr_feval_dd *tuner, int osr); - bool find_fcch_burst( const gr_complex *in, const int nitems ); - bool find_sch_burst( const gr_complex *in, const int nitems , gr_complex *out); - double compute_freq_offset ( ); - void set_frequency ( ); + bool find_fcch_burst(const gr_complex *in, const int nitems); + double compute_freq_offset(); + void set_frequency(double freq_offset); + bool find_sch_burst(const gr_complex *in, const int nitems , float *out); + void gmsk_mapper(const int * input, gr_complex * gmsk_output, int ninput); + gr_complex correlation(const gr_complex * sequence, const gr_complex * input_signal, int ninput); public: ~gsm_receiver_cf(); - void forecast( int noutput_items, gr_vector_int &ninput_items_required ); - int general_work( int noutput_items, - gr_vector_int &ninput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items ); + void forecast(int noutput_items, gr_vector_int &ninput_items_required); + int general_work(int noutput_items, + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); }; #endif /* INCLUDED_GSM_RECEIVER_CF_H */ |