diff options
Diffstat (limited to 'src/cohpsk_internal.h')
| -rw-r--r-- | src/cohpsk_internal.h | 138 |
1 files changed, 75 insertions, 63 deletions
diff --git a/src/cohpsk_internal.h b/src/cohpsk_internal.h index 20c479e..525ab9d 100644 --- a/src/cohpsk_internal.h +++ b/src/cohpsk_internal.h @@ -28,95 +28,107 @@ #ifndef __COHPSK_INTERNAL__ #define __COHPSK_INTERNAL__ -#define NCT_SYMB_BUF (2*NSYMROWPILOT+2) -#define COHPSK_ND 2 /* diversity factor ND 1 is no diveristy, ND we have original plus - one copy */ -#define NSW 4 /* number of sync window frames */ -#define COHPSK_M 100 /* oversampling rate */ -#define COHPSK_NSYM 6 -#define COHPSK_NFILTER (COHPSK_NSYM*COHPSK_M) -#define COHPSK_EXCESS_BW 0.5 /* excess BW factor of root nyq filter */ -#define COHPSK_NT 5 /* number of symbols we estimate timing over */ +#define NCT_SYMB_BUF (2 * NSYMROWPILOT + 2) +#define COHPSK_ND \ + 2 /* diversity factor ND 1 is no diveristy, ND we have original plus \ + one copy */ +#define NSW 4 /* number of sync window frames */ +#define COHPSK_M 100 /* oversampling rate */ +#define COHPSK_NSYM 6 +#define COHPSK_NFILTER (COHPSK_NSYM * COHPSK_M) +#define COHPSK_EXCESS_BW 0.5 /* excess BW factor of root nyq filter */ +#define COHPSK_NT 5 /* number of symbols we estimate timing over */ #include "fdmdv_internal.h" #include "kiss_fft.h" struct COHPSK { - COMP ch_fdm_frame_buf[NSW*NSYMROWPILOT*COHPSK_M]; /* buffer of several frames of symbols from channel */ - float pilot2[2*NPILOTSFRAME][COHPSK_NC]; - float phi_[NSYMROWPILOT][COHPSK_NC*COHPSK_ND]; /* phase estimates for this frame of rx data symbols */ - float amp_[NSYMROW][COHPSK_NC*COHPSK_ND]; /* amplitude estimates for this frame of rx data symbols */ - COMP rx_symb[NSYMROWPILOT][COHPSK_NC*COHPSK_ND]; /* demodulated symbols */ - float f_est; - COMP rx_filter_memory[COHPSK_NC*COHPSK_ND][COHPSK_NFILTER]; - COMP ct_symb_buf[NCT_SYMB_BUF][COHPSK_NC*COHPSK_ND]; - int ct; /* coarse timing offset in symbols */ - float rx_timing; /* fine timing for last symbol in frame */ - int nin; /* number of samples to input for next symbol */ - float f_fine_est; - COMP ff_rect; - COMP ff_phase; - COMP ct_symb_ff_buf[NSYMROWPILOT+2][COHPSK_NC*COHPSK_ND]; - int sync; - int sync_timer; + COMP ch_fdm_frame_buf[NSW * NSYMROWPILOT * + COHPSK_M]; /* buffer of several frames of symbols from + channel */ + float pilot2[2 * NPILOTSFRAME][COHPSK_NC]; + float phi_[NSYMROWPILOT] + [COHPSK_NC * + COHPSK_ND]; /* phase estimates for this frame of rx data symbols */ + float amp_[NSYMROW][COHPSK_NC * COHPSK_ND]; /* amplitude estimates for this + frame of rx data symbols */ + COMP rx_symb[NSYMROWPILOT][COHPSK_NC * COHPSK_ND]; /* demodulated symbols */ + float f_est; + COMP rx_filter_memory[COHPSK_NC * COHPSK_ND][COHPSK_NFILTER]; + COMP ct_symb_buf[NCT_SYMB_BUF][COHPSK_NC * COHPSK_ND]; + int ct; /* coarse timing offset in symbols */ + float rx_timing; /* fine timing for last symbol in frame */ + int nin; /* number of samples to input for next symbol */ + float f_fine_est; + COMP ff_rect; + COMP ff_phase; + COMP ct_symb_ff_buf[NSYMROWPILOT + 2][COHPSK_NC * COHPSK_ND]; + int sync; + int sync_timer; - int frame; - float ratio; + int frame; + float ratio; - float sig_rms; - float noise_rms; + float sig_rms; + float noise_rms; - struct FDMDV *fdmdv; + struct FDMDV *fdmdv; - int verbose; + int verbose; - int *ptest_bits_coh_tx; - int *ptest_bits_coh_rx[2]; - int *ptest_bits_coh_end; + int *ptest_bits_coh_tx; + int *ptest_bits_coh_rx[2]; + int *ptest_bits_coh_end; - /* counting bit errors using pilots */ + /* counting bit errors using pilots */ - int npilotbits; - int npilotbiterrors; + int npilotbits; + int npilotbiterrors; - /* optional log variables used for testing Octave to C port */ + /* optional log variables used for testing Octave to C port */ - COMP *rx_baseband_log; - int rx_baseband_log_col_index; - int rx_baseband_log_col_sz; + COMP *rx_baseband_log; + int rx_baseband_log_col_index; + int rx_baseband_log_col_sz; - COMP *rx_filt_log; - int rx_filt_log_col_index; - int rx_filt_log_col_sz; + COMP *rx_filt_log; + int rx_filt_log_col_index; + int rx_filt_log_col_sz; - COMP *ch_symb_log; - int ch_symb_log_r; - int ch_symb_log_col_sz; + COMP *ch_symb_log; + int ch_symb_log_r; + int ch_symb_log_col_sz; - float *rx_timing_log; - int rx_timing_log_index; + float *rx_timing_log; + int rx_timing_log_index; - /* demodulated bits before diversity combination for test/instrumentation purposes */ + /* demodulated bits before diversity combination for test/instrumentation + * purposes */ - float rx_bits_lower[COHPSK_BITS_PER_FRAME]; - float rx_bits_upper[COHPSK_BITS_PER_FRAME]; + float rx_bits_lower[COHPSK_BITS_PER_FRAME]; + float rx_bits_upper[COHPSK_BITS_PER_FRAME]; - /* tx amplitude weights for each carrier for test/instrumentation */ + /* tx amplitude weights for each carrier for test/instrumentation */ - float carrier_ampl[COHPSK_NC*COHPSK_ND]; + float carrier_ampl[COHPSK_NC * COHPSK_ND]; - /* Flag enabling simple freq est mode */ - int freq_est_mode_reduced; + /* Flag enabling simple freq est mode */ + int freq_est_mode_reduced; }; -void bits_to_qpsk_symbols(COMP tx_symb[][COHPSK_NC*COHPSK_ND], int tx_bits[], int nbits); -void qpsk_symbols_to_bits(struct COHPSK *coh, float rx_bits[], COMP ct_symb_buf[][COHPSK_NC*COHPSK_ND]); +void bits_to_qpsk_symbols(COMP tx_symb[][COHPSK_NC * COHPSK_ND], int tx_bits[], + int nbits); +void qpsk_symbols_to_bits(struct COHPSK *coh, float rx_bits[], + COMP ct_symb_buf[][COHPSK_NC * COHPSK_ND]); void tx_filter_and_upconvert_coh(COMP tx_fdm[], int Nc, const COMP tx_symbols[], COMP tx_filter_memory[][COHPSK_NSYM], - COMP phase_tx[], COMP freq[], - COMP *fbb_phase, COMP fbb_rect); -void fdm_downconvert_coh(COMP rx_baseband[][COHPSK_M+COHPSK_M/P], int Nc, COMP rx_fdm[], COMP phase_rx[], COMP freq[], int nin); -void frame_sync_fine_freq_est(struct COHPSK *coh, COMP ch_symb[][COHPSK_NC*COHPSK_ND], int sync, int *next_sync); + COMP phase_tx[], COMP freq[], COMP *fbb_phase, + COMP fbb_rect); +void fdm_downconvert_coh(COMP rx_baseband[][COHPSK_M + COHPSK_M / P], int Nc, + COMP rx_fdm[], COMP phase_rx[], COMP freq[], int nin); +void frame_sync_fine_freq_est(struct COHPSK *coh, + COMP ch_symb[][COHPSK_NC * COHPSK_ND], int sync, + int *next_sync); void fine_freq_correct(struct COHPSK *coh, int sync, int next_sync); int sync_state_machine(struct COHPSK *coh, int sync, int next_sync); int cohpsk_fs_offset(COMP out[], COMP in[], int n, float sample_rate_ppm); |