The costas loop seems to at least work

This commit is contained in:
ha7ilm 2017-04-01 16:08:49 +02:00
parent ca40a41d5a
commit c7137dc68e
2 changed files with 23 additions and 23 deletions

View file

@ -517,7 +517,7 @@
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@ -536,7 +536,7 @@
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<key>commandline</key>
<value>csdr bpsk_costas_loop_cc 8</value>
<value>csdr bpsk_costas_loop_cc 16</value>
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@ -1016,12 +1016,6 @@
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@ -1036,7 +1030,7 @@
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View file

@ -1949,7 +1949,7 @@ bpsk_costas_loop_state_t init_bpsk_costas_loop_cc(float samples_per_bits)
rc_filter_cutoff, rc_filter_rc, virtual_sampling_dt);
state.rc_filter_alpha = virtual_sampling_dt/(rc_filter_rc+virtual_sampling_dt); //https://en.wikipedia.org/wiki/Low-pass_filter
float rc_filter_omega_cutoff = 2*M_PI*rc_filter_cutoff;
state.vco_phase_addition_multiplier = 8*rc_filter_omega_cutoff; //as of Equation 25 in Feigin, assuming input signal amplitude of 1 (to 1V) and (state.vco_phase_addition_multiplier*<vco_input>), a value in radians, will be added to the vco_phase directly.
state.vco_phase_addition_multiplier = 8*rc_filter_omega_cutoff / (virtual_sampling_rate); //as of Equation 25 in Feigin, assuming input signal amplitude of 1 (to 1V) and (state.vco_phase_addition_multiplier*<vco_input>), a value in radians, will be added to the vco_phase directly.
fprintf(stderr, "rc_filter_alpha = %g, rc_filter_omega_cutoff = %g, vco_phase_addition_multiplier = %g\n",
state.rc_filter_alpha, rc_filter_omega_cutoff, state.vco_phase_addition_multiplier);
return state;