diff options
Diffstat (limited to 'src/lib/gsm_receiver_cf.h')
| -rw-r--r-- | src/lib/gsm_receiver_cf.h | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/src/lib/gsm_receiver_cf.h b/src/lib/gsm_receiver_cf.h index 5bc7617..2012325 100644 --- a/src/lib/gsm_receiver_cf.h +++ b/src/lib/gsm_receiver_cf.h @@ -24,8 +24,8 @@ #include <gr_block.h> #include <gr_complex.h> - -#define BUFFER_SIZE 4096 +#include <gr_feval.h> +#include <boost/circular_buffer.hpp> class gsm_receiver_cf; @@ -42,6 +42,8 @@ class gsm_receiver_cf; */ typedef boost::shared_ptr<gsm_receiver_cf> gsm_receiver_cf_sptr; +typedef boost::circular_buffer<float> circular_buffer_float; + /*! * \brief Return a shared_ptr to a new instance of gsm_receiver_cf. * @@ -49,7 +51,7 @@ typedef boost::shared_ptr<gsm_receiver_cf> gsm_receiver_cf_sptr; * constructor is private. howto_make_square_ff is the public * interface for creating new instances. */ -gsm_receiver_cf_sptr gsm_make_receiver_cf( int osr ); +gsm_receiver_cf_sptr gsm_make_receiver_cf( gr_feval_dd *tuner, int osr ); /*! * \brief Receives fcch @@ -61,13 +63,27 @@ class gsm_receiver_cf : public gr_block { private: + gr_feval_dd *d_tuner; + const int d_osr; int d_counter; - int d_return; - float d_phase_diff_buffer[BUFFER_SIZE]; + 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; - friend gsm_receiver_cf_sptr gsm_make_receiver_cf( int osr ); - gsm_receiver_cf( int osr ); - int find_fcch_burst( const gr_complex *in, const int items ); + 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 ); + + 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 ( ); public: ~gsm_receiver_cf(); |