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-rw-r--r--src/lib/gsm_receiver_cf.cc49
-rw-r--r--src/lib/gsm_receiver_cf.h28
2 files changed, 60 insertions, 17 deletions
diff --git a/src/lib/gsm_receiver_cf.cc b/src/lib/gsm_receiver_cf.cc
index 821c929..e478c66 100644
--- a/src/lib/gsm_receiver_cf.cc
+++ b/src/lib/gsm_receiver_cf.cc
@@ -68,11 +68,52 @@ gsm_receiver_cf::general_work (int noutput_items,
out[i] = in[i] * in[i];
}
- // Tell runtime system how many input items we consumed on
- // each input stream.
-
consume_each (noutput_items);
- // Tell runtime system how many output items we produced.
return noutput_items;
}
+
+
+bool gsm_receiver_cf::get_fcch_burst()
+{
+ int hit_count = 0;
+ int miss_count = 0;
+ int start_pos = -1;
+/*
+ for ( int i=0; i < BBUF_SIZE; i++ ) {
+ if ( d_burst_buffer[i] > 0 ) {
+ if ( ! hit_count++ )
+ start_pos = i;
+ } else {
+ if ( hit_count >= FCCH_HITS_NEEDED ) {
+ break;
+ } else
+ if ( ++miss_count > FCCH_MAX_MISSES ) {
+ start_pos = -1;
+ hit_count = miss_count = 0;
+ }
+ }
+ }
+
+ //Do we have a match?
+ if ( start_pos >= 0 ) {
+ //Is it within range? (we know it's long enough then too)
+ if ( start_pos < 2*MAX_CORR_DIST ) {
+ d_burst_start = start_pos;
+ d_bbuf_pos = 0; //load buffer from start
+ return FCCH;
+
+ } else {
+ //TODO: don't shift a tiny amount
+ shift_burst( start_pos - MAX_CORR_DIST );
+ }
+ } else {
+ //Didn't find anything
+ d_burst_start = MAX_CORR_DIST;
+ d_bbuf_pos = 0; //load buffer from start
+ }
+
+ return UNKNOWN;
+*/
+}
+
diff --git a/src/lib/gsm_receiver_cf.h b/src/lib/gsm_receiver_cf.h
index 3b4ffc6..7067fb2 100644
--- a/src/lib/gsm_receiver_cf.h
+++ b/src/lib/gsm_receiver_cf.h
@@ -47,28 +47,30 @@ 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 ();
+gsm_receiver_cf_sptr gsm_make_receiver_cf();
/*!
- * \brief square a stream of floats.
+ * \brief Receives fcch
* \ingroup block
- *
- * \sa howto_square2_ff for a version that subclasses gr_sync_block.
+ * \sa
*/
+
class gsm_receiver_cf : public gr_block
{
-private:
- friend gsm_receiver_cf_sptr gsm_make_receiver_cf ();
- gsm_receiver_cf ();
+ private:
+ friend gsm_receiver_cf_sptr gsm_make_receiver_cf();
+
+ gsm_receiver_cf();
+ bool get_fcch_burst();
- public:
- ~gsm_receiver_cf ();
+ public:
+ ~gsm_receiver_cf();
- int general_work (int noutput_items,
- gr_vector_int &ninput_items,
- gr_vector_const_void_star &input_items,
- gr_vector_void_star &output_items);
+ 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 */
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