return (sample.real()*sample.imag());
}
+void
+gr_costas_loop_cc::set_alpha(float alpha)
+{
+ d_alpha = alpha;
+}
+
+void
+gr_costas_loop_cc::set_beta(float beta)
+{
+ d_beta = beta;
+}
+
int
gr_costas_loop_cc::work (int noutput_items,
gr_vector_const_void_star &input_items,
float error;
gr_complex nco_out;
-
- for (int i = 0; i < noutput_items; i++){
- nco_out = gr_expj(-d_phase);
- optr[i] = iptr[i] * nco_out;
-
- error = (*this.*d_phase_detector)(optr[i]);
- if (error > 1)
- error = 1;
- else if (error < -1)
- error = -1;
-
- d_freq = d_freq + d_beta * error;
- d_phase = d_phase + d_freq + d_alpha * error;
-
- while(d_phase>M_TWOPI)
- d_phase -= M_TWOPI;
- while(d_phase<-M_TWOPI)
- d_phase += M_TWOPI;
-
- if (d_freq > d_max_freq)
- d_freq = d_max_freq;
- else if (d_freq < d_min_freq)
- d_freq = d_min_freq;
-
- if (write_foptr){
+
+ if (write_foptr) {
+
+ for (int i = 0; i < noutput_items; i++){
+ nco_out = gr_expj(-d_phase);
+ optr[i] = iptr[i] * nco_out;
+
+ error = (*this.*d_phase_detector)(optr[i]);
+ if (error > 1)
+ error = 1;
+ else if (error < -1)
+ error = -1;
+
+ d_freq = d_freq + d_beta * error;
+ d_phase = d_phase + d_freq + d_alpha * error;
+
+ while(d_phase>M_TWOPI)
+ d_phase -= M_TWOPI;
+ while(d_phase<-M_TWOPI)
+ d_phase += M_TWOPI;
+
+ if (d_freq > d_max_freq)
+ d_freq = d_max_freq;
+ else if (d_freq < d_min_freq)
+ d_freq = d_min_freq;
+
foptr[i] = gr_complex(d_freq,0);
- //foptr[i] = gr_complex(error, 0);
+ }
+ } else {
+ for (int i = 0; i < noutput_items; i++){
+ nco_out = gr_expj(-d_phase);
+ optr[i] = iptr[i] * nco_out;
+
+ error = (*this.*d_phase_detector)(optr[i]);
+ if (error > 1)
+ error = 1;
+ else if (error < -1)
+ error = -1;
+
+ d_freq = d_freq + d_beta * error;
+ d_phase = d_phase + d_freq + d_alpha * error;
+
+ while(d_phase>M_TWOPI)
+ d_phase -= M_TWOPI;
+ while(d_phase<-M_TWOPI)
+ d_phase += M_TWOPI;
+
+ if (d_freq > d_max_freq)
+ d_freq = d_max_freq;
+ else if (d_freq < d_min_freq)
+ d_freq = d_min_freq;
+
}
}
return noutput_items;