v17rx.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/v17tx.h"
#include "spandsp/v17rx.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/v17rx.h"
#include "v17tx_constellation_maps.h"
#include "v17rx_constellation_maps.h"
#include "v17rx_floating_rrc.h"

Defines

#define IAXMODEM_STUFF
#define CARRIER_NOMINAL_FREQ   1800.0f
#define BAUD_RATE   2400
#define EQUALIZER_DELTA   0.21f
#define EQUALIZER_SLOW_ADAPT_RATIO   0.1f
#define V17_TRAINING_SEG_1_LEN   256
#define V17_TRAINING_SEG_2_LEN   2976
#define V17_TRAINING_SHORT_SEG_2_LEN   38
#define V17_TRAINING_SEG_3_LEN   64
#define V17_TRAINING_SEG_4A_LEN   15
#define V17_TRAINING_SEG_4_LEN   48
#define V17_BRIDGE_WORD   0x8880
#define V17_EQUALIZER_LEN   (V17_EQUALIZER_PRE_LEN + 1 + V17_EQUALIZER_POST_LEN)
#define SYNC_LOW_BAND_EDGE_COEFF_0   1.764193f
#define SYNC_LOW_BAND_EDGE_COEFF_1   -0.980100f
#define SYNC_HIGH_BAND_EDGE_COEFF_0   -1.400072f
#define SYNC_HIGH_BAND_EDGE_COEFF_1   -0.980100f
#define SYNC_CROSS_CORR_COEFF_A   -0.932131f
#define SYNC_CROSS_CORR_COEFF_B   0.700036f
#define SYNC_CROSS_CORR_COEFF_C   -0.449451f

Enumerations

enum  {
  TRAINING_STAGE_NORMAL_OPERATION = 0, TRAINING_STAGE_SYMBOL_ACQUISITION, TRAINING_STAGE_LOG_PHASE, TRAINING_STAGE_SHORT_WAIT_FOR_CDBA,
  TRAINING_STAGE_WAIT_FOR_CDBA, TRAINING_STAGE_COARSE_TRAIN_ON_CDBA, TRAINING_STAGE_FINE_TRAIN_ON_CDBA, TRAINING_STAGE_SHORT_TRAIN_ON_CDBA_AND_TEST,
  TRAINING_STAGE_TRAIN_ON_CDBA_AND_TEST, TRAINING_STAGE_BRIDGE, TRAINING_STAGE_TCM_WINDUP, TRAINING_STAGE_TEST_ONES,
  TRAINING_STAGE_PARKED
}

Functions

float v17_rx_carrier_frequency (v17_rx_state_t *s)
float v17_rx_symbol_timing_correction (v17_rx_state_t *s)
float v17_rx_signal_power (v17_rx_state_t *s)
void v17_rx_signal_cutoff (v17_rx_state_t *s, float cutoff)
int v17_rx_equalizer_state (v17_rx_state_t *s, complexf_t **coeffs)
int v17_rx (v17_rx_state_t *s, const int16_t amp[], int len)
int v17_rx_fillin (v17_rx_state_t *s, int len)
void v17_rx_set_put_bit (v17_rx_state_t *s, put_bit_func_t put_bit, void *user_data)
void v17_rx_set_modem_status_handler (v17_rx_state_t *s, modem_tx_status_func_t handler, void *user_data)
logging_state_t * v17_rx_get_logging_state (v17_rx_state_t *s)
int v17_rx_restart (v17_rx_state_t *s, int bit_rate, int short_train)
v17_rx_state_t * v17_rx_init (v17_rx_state_t *s, int bit_rate, put_bit_func_t put_bit, void *user_data)
int v17_rx_release (v17_rx_state_t *s)
int v17_rx_free (v17_rx_state_t *s)
void v17_rx_set_qam_report_handler (v17_rx_state_t *s, qam_report_handler_t handler, void *user_data)

Detailed Description


Define Documentation

#define BAUD_RATE   2400

The nominal baud or symbol rate

#define CARRIER_NOMINAL_FREQ   1800.0f

The nominal frequency of the carrier, in Hertz

#define EQUALIZER_DELTA   0.21f

The adaption rate coefficient for the equalizer during initial training

#define EQUALIZER_SLOW_ADAPT_RATIO   0.1f

The adaption rate coefficient for the equalizer during continuous fine tuning

#define V17_BRIDGE_WORD   0x8880

The 16 bit pattern used in the bridge section of the training sequence

#define V17_EQUALIZER_LEN   (V17_EQUALIZER_PRE_LEN + 1 + V17_EQUALIZER_POST_LEN)

The length of the equalizer buffer

#define V17_TRAINING_SEG_1_LEN   256

The length of training segment 1, in symbols

#define V17_TRAINING_SEG_2_LEN   2976

The length of training segment 2 in long training mode, in symbols

#define V17_TRAINING_SEG_3_LEN   64

The length of training segment 3, in symbols

#define V17_TRAINING_SEG_4_LEN   48

The length of training segment 4, in symbols

#define V17_TRAINING_SEG_4A_LEN   15

The length of training segment 4A, in symbols

#define V17_TRAINING_SHORT_SEG_2_LEN   38

The length of training segment 2 in short training mode, in symbols


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