v29rx.c File Reference

#include <stdlib.h>
#include <inttypes.h>
#include <string.h>
#include <stdio.h>
#include <tgmath.h>
#include <math.h>
#include "floating_fudge.h"
#include "spandsp/telephony.h"
#include "spandsp/logging.h"
#include "spandsp/complex.h"
#include "spandsp/vector_float.h"
#include "spandsp/complex_vector_float.h"
#include "spandsp/vector_int.h"
#include "spandsp/complex_vector_int.h"
#include "spandsp/async.h"
#include "spandsp/power_meter.h"
#include "spandsp/arctan2.h"
#include "spandsp/dds.h"
#include "spandsp/complex_filters.h"
#include "spandsp/v29rx.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/v29rx.h"
#include "v29tx_constellation_maps.h"
#include "v29rx_floating_rrc.h"

Defines
#define	IAXMODEM_STUFF
#define	CARRIER_NOMINAL_FREQ   1700.0f
#define	BAUD_RATE   2400
#define	EQUALIZER_DELTA   0.21f
#define	V29_TRAINING_SEG_2_LEN   128
#define	V29_TRAINING_SEG_3_LEN   384
#define	V29_TRAINING_SEG_4_LEN   48
#define	V29_EQUALIZER_LEN   (V29_EQUALIZER_PRE_LEN + 1 + V29_EQUALIZER_POST_LEN)
#define	SYNC_LOW_BAND_EDGE_COEFF_0   1.829281f
#define	SYNC_LOW_BAND_EDGE_COEFF_1   -0.980100f
#define	SYNC_HIGH_BAND_EDGE_COEFF_0   -1.285907f
#define	SYNC_HIGH_BAND_EDGE_COEFF_1   -0.980100f
#define	SYNC_CROSS_CORR_COEFF_A   -0.932131f
#define	SYNC_CROSS_CORR_COEFF_B   0.752802f
#define	SYNC_CROSS_CORR_COEFF_C   -0.378857f
Enumerations
enum	{   TRAINING_STAGE_NORMAL_OPERATION = 0, TRAINING_STAGE_SYMBOL_ACQUISITION, TRAINING_STAGE_LOG_PHASE, TRAINING_STAGE_WAIT_FOR_CDCD,   TRAINING_STAGE_TRAIN_ON_CDCD, TRAINING_STAGE_TRAIN_ON_CDCD_AND_TEST, TRAINING_STAGE_TEST_ONES, TRAINING_STAGE_PARKED }
Functions
float	v29_rx_carrier_frequency (v29_rx_state_t *s)
float	v29_rx_symbol_timing_correction (v29_rx_state_t *s)
float	v29_rx_signal_power (v29_rx_state_t *s)
void	v29_rx_signal_cutoff (v29_rx_state_t *s, float cutoff)
int	v29_rx_equalizer_state (v29_rx_state_t *s, complexf_t **coeffs)
int	v29_rx (v29_rx_state_t *s, const int16_t amp[], int len)
int	v29_rx_fillin (v29_rx_state_t *s, int len)
void	v29_rx_set_put_bit (v29_rx_state_t *s, put_bit_func_t put_bit, void *user_data)
void	v29_rx_set_modem_status_handler (v29_rx_state_t *s, modem_tx_status_func_t handler, void *user_data)
logging_state_t *	v29_rx_get_logging_state (v29_rx_state_t *s)
int	v29_rx_restart (v29_rx_state_t *s, int bit_rate, int old_train)
v29_rx_state_t *	v29_rx_init (v29_rx_state_t *s, int bit_rate, put_bit_func_t put_bit, void *user_data)
int	v29_rx_release (v29_rx_state_t *s)
int	v29_rx_free (v29_rx_state_t *s)
void	v29_rx_set_qam_report_handler (v29_rx_state_t *s, qam_report_handler_t handler, void *user_data)

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Detailed Description

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Define Documentation

#define BAUD_RATE   2400

The nominal baud or symbol rate

#define CARRIER_NOMINAL_FREQ   1700.0f

The nominal frequency of the carrier, in Hertz

#define EQUALIZER_DELTA   0.21f

The adaption rate coefficient for the equalizer

#define V29_EQUALIZER_LEN   (V29_EQUALIZER_PRE_LEN + 1 + V29_EQUALIZER_POST_LEN)

The length of the equalizer buffer

#define V29_TRAINING_SEG_2_LEN   128

The length of training segment 2, in symbols

#define V29_TRAINING_SEG_3_LEN   384

The length of training segment 3, in symbols

#define V29_TRAINING_SEG_4_LEN   48

The length of training segment 4, in symbols