mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-22 16:08:39 -05:00
80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
|
/*---------------------------------------------------------------------------*\
|
||
|
|
|
||
|
|
FILE........: modem_stats.h
|
||
|
|
AUTHOR......: David Rowe
|
||
|
|
DATE CREATED: June 2015
|
||
|
|
|
||
|
|
Common structure for returning demod stats from fdmdv and cohpsk modems.
|
||
|
|
|
||
|
|
\*---------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
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 __FREEDV_MODEM_STATS__
|
||
|
|
#define __FREEDV_MODEM_STATS__
|
||
|
|
|
||
|
|
#include "codec2/comp.h"
|
||
|
|
#include "kiss_fft.h"
|
||
|
|
|
||
|
|
#define MODEM_STATS_NC_MAX 20
|
||
|
|
#define MODEM_STATS_NR_MAX 8
|
||
|
|
#define MODEM_STATS_ET_MAX 8
|
||
|
|
#define MODEM_STATS_EYE_IND_MAX 160
|
||
|
|
#define MODEM_STATS_NSPEC 512
|
||
|
|
#define MODEM_STATS_MAX_F_HZ 4000
|
||
|
|
#define MODEM_STATS_MAX_F_EST 4
|
||
|
|
|
||
|
|
namespace FreeDV
|
||
|
|
{
|
||
|
|
|
||
|
|
struct MODEM_STATS {
|
||
|
|
int Nc;
|
||
|
|
float snr_est; /* estimated SNR of rx signal in dB (3 kHz noise BW) */
|
||
|
|
COMP rx_symbols[MODEM_STATS_NR_MAX][MODEM_STATS_NC_MAX+1];
|
||
|
|
/* latest received symbols, for scatter plot */
|
||
|
|
int nr; /* number of rows in rx_symbols */
|
||
|
|
int sync; /* demod sync state */
|
||
|
|
float foff; /* estimated freq offset in Hz */
|
||
|
|
float rx_timing; /* estimated optimum timing offset in samples */
|
||
|
|
float clock_offset; /* Estimated tx/rx sample clock offset in ppm */
|
||
|
|
float sync_metric; /* number between 0 and 1 indicating quality of sync */
|
||
|
|
|
||
|
|
/* eye diagram traces */
|
||
|
|
/* Eye diagram plot -- first dim is trace number, second is the trace idx */
|
||
|
|
float rx_eye[MODEM_STATS_ET_MAX][MODEM_STATS_EYE_IND_MAX];
|
||
|
|
int neyetr; /* How many eye traces are plotted */
|
||
|
|
int neyesamp; /* How many samples in the eye diagram */
|
||
|
|
|
||
|
|
/* optional for FSK modems - est tone freqs */
|
||
|
|
|
||
|
|
float f_est[MODEM_STATS_MAX_F_EST];
|
||
|
|
|
||
|
|
/* Buf for FFT/waterfall */
|
||
|
|
|
||
|
|
float fft_buf[2*MODEM_STATS_NSPEC];
|
||
|
|
kiss_fft_cfg fft_cfg;
|
||
|
|
};
|
||
|
|
|
||
|
|
void modem_stats_open(struct MODEM_STATS *f);
|
||
|
|
void modem_stats_close(struct MODEM_STATS *f);
|
||
|
|
void modem_stats_get_rx_spectrum(struct MODEM_STATS *f, float mag_spec_dB[], COMP rx_fdm[], int nin);
|
||
|
|
|
||
|
|
} // FreeDV
|
||
|
|
|
||
|
|
#endif
|