26#if !defined(_SPANDSP_PRIVATE_V29RX_H_)
27#define _SPANDSP_PRIVATE_V29RX_H_
32#define V29_EQUALIZER_LEN 33
34#define V29_EQUALIZER_PRE_LEN 16
37#define V29_RX_FILTER_STEPS 27
64#if defined(SPANDSP_USE_FIXED_POINT)
void(* modem_status_func_t)(void *user_data, int status)
Definition: async.h:114
void(* put_bit_func_t)(void *user_data, int bit)
Definition: async.h:105
Definition: private/logging.h:34
Definition: power_meter.h:49
Definition: private/v29rx.h:44
int eq_skip
Symbol counter to the next equalizer update.
Definition: private/v29rx.h:178
float carrier_track_p
The proportional part of the carrier tracking filter.
Definition: private/v29rx.h:127
modem_status_func_t status_handler
The callback function used to report modem status changes.
Definition: private/v29rx.h:53
uint32_t carrier_phase
The current phase of the carrier (i.e. the DDS parameter).
Definition: private/v29rx.h:160
void * status_user_data
A user specified opaque pointer passed to the status function.
Definition: private/v29rx.h:55
float baud_phase
Definition: private/v29rx.h:120
int32_t carrier_on_power
The power meter level at which carrier on is declared.
Definition: private/v29rx.h:169
float eq_delta
The current delta factor for updating the equalizer coefficients.
Definition: private/v29rx.h:105
int baud_half
The current half of the baud.
Definition: private/v29rx.h:181
int low_samples
A count of the current consecutive samples below the carrier off threshold.
Definition: private/v29rx.h:155
float carrier_track_i
The integral part of the carrier tracking filter.
Definition: private/v29rx.h:129
int32_t carrier_off_power
The power meter level at which carrier off is declared.
Definition: private/v29rx.h:171
uint8_t training_scramble_reg
The register for the training scrambler.
Definition: private/v29rx.h:139
put_bit_func_t put_bit
The callback function used to put each bit received.
Definition: private/v29rx.h:48
int old_train
TRUE if the previous trained values are to be reused.
Definition: private/v29rx.h:143
int training_count
A count of how far through the current training step we are.
Definition: private/v29rx.h:147
complexf_t eq_coeff[33]
The adaptive equalizer coefficients.
Definition: private/v29rx.h:107
int total_baud_timing_correction
The total symbol timing correction since the carrier came up. This is only for performance analysis p...
Definition: private/v29rx.h:185
int carrier_drop_pending
Whether or not a carrier drop was detected and the signal delivery is pending.
Definition: private/v29rx.h:153
int32_t angles[16]
History list of phase angles for the coarse carrier aquisition step.
Definition: private/v29rx.h:190
logging_state_t logging
Error and flow logging control.
Definition: private/v29rx.h:197
complexf_t eq_coeff_save[33]
A saved set of adaptive equalizer coefficients for use after restarts.
Definition: private/v29rx.h:109
int16_t high_sample
A highest magnitude sample seen.
Definition: private/v29rx.h:157
int32_t carrier_phase_rate
The update rate for the phase of the carrier (i.e. the DDS increment).
Definition: private/v29rx.h:162
void * qam_user_data
A user specified opaque pointer passed to the qam_report callback routine.
Definition: private/v29rx.h:62
int training_stage
The section of the training data we are currently in.
Definition: private/v29rx.h:145
float rrc_filter[27]
The root raised cosine (RRC) pulse shaping filter buffer.
Definition: private/v29rx.h:131
uint32_t scramble_reg
The register for the data scrambler.
Definition: private/v29rx.h:137
int bit_rate
The bit rate of the modem. Valid values are 4800, 7200 and 9600.
Definition: private/v29rx.h:46
int constellation_state
The position of the current symbol in the constellation, used for differential decoding.
Definition: private/v29rx.h:194
int rrc_filter_step
Current offset into the RRC pulse shaping filter buffer.
Definition: private/v29rx.h:134
float symbol_sync_low[2]
Definition: private/v29rx.h:114
qam_report_handler_t qam_report
A callback function which may be enabled to report every symbol's constellation position.
Definition: private/v29rx.h:59
int eq_step
Current read offset into the equalizer buffer.
Definition: private/v29rx.h:174
power_meter_t power
A power meter, to measure the HPF'ed signal power in the channel.
Definition: private/v29rx.h:167
int signal_present
>0 if a signal above the minimum is present. It may or may not be a V.29 signal.
Definition: private/v29rx.h:151
int32_t start_angles[2]
Starting phase angles for the coarse carrier aquisition step.
Definition: private/v29rx.h:188
int16_t last_sample
The value of the last signal sample, using the a simple HPF for signal power estimation.
Definition: private/v29rx.h:149
void * put_bit_user_data
A user specified opaque pointer passed to the put_bit routine.
Definition: private/v29rx.h:50
int32_t carrier_phase_rate_save
The carrier update rate saved for reuse when using short training.
Definition: private/v29rx.h:164
float symbol_sync_high[2]
Definition: private/v29rx.h:116
complexf_t eq_buf[33]
The equalizer signal buffer.
Definition: private/v29rx.h:111
float symbol_sync_dc_filter[2]
Definition: private/v29rx.h:118
int eq_put_step
Current write offset into the equalizer buffer.
Definition: private/v29rx.h:176
float agc_scaling_save
The previous value of agc_scaling, needed to reuse old training.
Definition: private/v29rx.h:102
int training_cd
The current step in the table of CD constellation positions.
Definition: private/v29rx.h:141
float agc_scaling
The scaling factor accessed by the AGC algorithm.
Definition: private/v29rx.h:100
float training_error
A measure of how much mismatch there is between the real constellation, and the decoded symbol positi...
Definition: private/v29rx.h:124