mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-22 16:08:39 -05:00
77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
/*---------------------------------------------------------------------------*\
|
|
|
|
FILE........: codec2_cohpsk.h
|
|
AUTHOR......: David Rowe
|
|
DATE CREATED: March 2015
|
|
|
|
Functions that implement a coherent PSK FDM modem.
|
|
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
Copyright (C) 2015 David Rowe
|
|
|
|
All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License version 2.1, as
|
|
published by the Free Software Foundation. This program is
|
|
distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __CODEC2_COHPSK__
|
|
#define __CODEC2_COHPSK__
|
|
|
|
#define COHPSK_BITS_PER_FRAME 56 /* hard coded for now */
|
|
#define COHPSK_NC 7 /* hard coded for now */
|
|
#define COHPSK_NOM_SAMPLES_PER_FRAME 600
|
|
#define COHPSK_MAX_SAMPLES_PER_FRAME 625
|
|
#define COHPSK_RS 75
|
|
#define COHPSK_FS 7500 /* note this is a wierd
|
|
value to get an integer
|
|
oversampling rate */
|
|
#define COHPSK_CLIP 6.5 /* hard clipping for Nc*Nc=14 to reduce PAPR */
|
|
|
|
#include "codec2/comp.h"
|
|
#include "modem_stats.h"
|
|
|
|
namespace FreeDV
|
|
{
|
|
|
|
struct COHPSK;
|
|
|
|
extern const int test_bits_coh[];
|
|
|
|
struct COHPSK *cohpsk_create(void);
|
|
void cohpsk_destroy(struct COHPSK *coh);
|
|
void cohpsk_mod(struct COHPSK *cohpsk, COMP tx_fdm[], int tx_bits[], int nbits);
|
|
void cohpsk_clip(COMP tx_fdm[], float clip_thresh, int n);
|
|
void cohpsk_demod(struct COHPSK *cohpsk, float rx_bits[], int *sync, COMP rx_fdm[], int *nin_frame);
|
|
void cohpsk_get_demod_stats(struct COHPSK *cohpsk, struct MODEM_STATS *stats);
|
|
void cohpsk_set_verbose(struct COHPSK *coh, int verbose);
|
|
void cohpsk_get_test_bits(struct COHPSK *coh, int rx_bits[]);
|
|
void cohpsk_put_test_bits(struct COHPSK *coh, int *state, short error_pattern[],
|
|
int *bit_errors, char rx_bits[], int channel);
|
|
int cohpsk_error_pattern_size(void);
|
|
void cohpsk_set_frame(struct COHPSK *coh, int frame);
|
|
void fdmdv_freq_shift_coh(COMP rx_fdm_fcorr[], COMP rx_fdm[], float foff, float Fs,
|
|
COMP *foff_phase_rect, int nin);
|
|
|
|
void cohpsk_set_freq_est_mode(struct COHPSK *coh, int used_simple_mode);
|
|
|
|
/* used for accessing upper and lower bits before diversity combination */
|
|
|
|
float *cohpsk_get_rx_bits_lower(struct COHPSK *coh);
|
|
float *cohpsk_get_rx_bits_upper(struct COHPSK *coh);
|
|
void cohpsk_set_carrier_ampl(struct COHPSK *coh, int c, float ampl);
|
|
|
|
} // FreeDV
|
|
|
|
#endif
|