mirror of
https://agent.ghink.cloud/wb2osz/direwolf
synced 2025-04-19 12:59:32 +00:00
9922f176b2
'A' uses mark and space filters but simpler and cleaner than earlier attempts. New 'B' uses a different technique where the demodulated signal is proportional to the frequency.
18 lines
544 B
C
18 lines
544 B
C
|
|
/* dsp.h */
|
|
|
|
// TODO: put prefixes on these names.
|
|
|
|
float window (bp_window_t type, int size, int j);
|
|
|
|
void gen_lowpass (float fc, float *lp_filter, int filter_size, bp_window_t wtype);
|
|
|
|
void gen_bandpass (float f1, float f2, float *bp_filter, int filter_size, bp_window_t wtype);
|
|
|
|
void gen_ms (int fc, int samples_per_sec, float *sin_table, float *cos_table, int filter_size, int wtype);
|
|
|
|
|
|
__attribute__((const)) float rrc (float t, float a);
|
|
|
|
void gen_rrc_lowpass (float *pfilter, int filter_taps, float rolloff, float samples_per_symbol);
|