| spandsp 0.0.6
    | 
#include <v17rx.h>
| Public Attributes | |
| int | bit_rate | 
| The bit rate of the modem. Valid values are 7200 9600, 12000 and 14400. | |
| put_bit_func_t | put_bit | 
| The callback function used to put each bit received. | |
| void * | put_bit_user_data | 
| A user specified opaque pointer passed to the put_but routine. | |
| modem_status_func_t | status_handler | 
| The callback function used to report modem status changes. | |
| void * | status_user_data | 
| A user specified opaque pointer passed to the status function. | |
| qam_report_handler_t | qam_report | 
| A callback function which may be enabled to report every symbol's constellation position. | |
| void * | qam_user_data | 
| A user specified opaque pointer passed to the qam_report callback routine. | |
| int16_t | power_window [40] | 
| int | power_window_ptr | 
| int64_t | window_power | 
| int64_t | window_power_save | 
| float | agc_scaling | 
| The scaling factor accessed by the AGC algorithm. | |
| float | agc_scaling_save | 
| The previous value of agc_scaling, needed to reuse old training. | |
| float | eq_delta | 
| The current delta factor for updating the equalizer coefficients. | |
| complexf_t | eq_coeff [17] | 
| The adaptive equalizer coefficients. | |
| complexf_t | eq_coeff_save [17] | 
| A saved set of adaptive equalizer coefficients for use after restarts. | |
| complexf_t | eq_buf [17] | 
| The equalizer signal buffer. | |
| float | symbol_sync_low [2] | 
| float | symbol_sync_high [2] | 
| float | symbol_sync_dc_filter [2] | 
| float | baud_phase | 
| float | training_error | 
| A measure of how much mismatch there is between the real constellation, and the decoded symbol positions. | |
| float | carrier_track_p | 
| The proportional part of the carrier tracking filter. | |
| float | carrier_track_i | 
| The integral part of the carrier tracking filter. | |
| float | rrc_filter [27] | 
| The root raised cosine (RRC) pulse shaping filter buffer. | |
| const complexf_t * | constellation | 
| A pointer to the current constellation. | |
| int | rrc_filter_step | 
| Current offset into the RRC pulse shaping filter buffer. | |
| int | diff | 
| The current state of the differential decoder. | |
| uint32_t | scramble_reg | 
| The register for the data scrambler. | |
| int | short_train | 
| Scrambler tap. | |
| int | training_stage | 
| The section of the training data we are currently in. | |
| int | training_count | 
| A count of how far through the current training step we are. | |
| int16_t | last_sample | 
| The value of the last signal sample, using the a simple HPF for signal power estimation. | |
| int | signal_present | 
| >0 if a signal above the minimum is present. It may or may not be a V.17 signal. | |
| int | carrier_drop_pending | 
| Whether or not a carrier drop was detected and the signal delivery is pending. | |
| int | low_samples | 
| A count of the current consecutive samples below the carrier off threshold. | |
| int16_t | high_sample | 
| A highest magnitude sample seen. | |
| uint32_t | carrier_phase | 
| The current phase of the carrier (i.e. the DDS parameter). | |
| int32_t | carrier_phase_rate | 
| The update rate for the phase of the carrier (i.e. the DDS increment). | |
| int32_t | carrier_phase_rate_save | 
| The carrier update rate saved for reuse when using short training. | |
| power_meter_t | power | 
| A power meter, to measure the HPF'ed signal power in the channel. | |
| int32_t | carrier_on_power | 
| The power meter level at which carrier on is declared. | |
| int32_t | carrier_off_power | 
| The power meter level at which carrier off is declared. | |
| int | eq_step | 
| Current read offset into the equalizer buffer. | |
| int | eq_put_step | 
| Current write offset into the equalizer buffer. | |
| int | eq_skip | 
| Symbol count to the next equalizer update. | |
| int | baud_half | 
| The current half of the baud. | |
| int | total_baud_timing_correction | 
| The total symbol timing correction since the carrier came up. This is only for performance analysis purposes. | |
| int32_t | start_angles [2] | 
| Starting phase angles for the coarse carrier aquisition step. | |
| int32_t | angles [16] | 
| History list of phase angles for the coarse carrier aquisition step. | |
| int | space_map | 
| A pointer to the current space map. There is a space map for each trellis state. | |
| int | bits_per_symbol | 
| The number of bits in each symbol at the current bit rate. | |
| int | trellis_ptr | 
| Current pointer to the trellis buffers. | |
| int | full_path_to_past_state_locations [16][8] | 
| The trellis. | |
| int | past_state_locations [16][8] | 
| The trellis. | |
| float | distances [8] | 
| Euclidean distances (actually the squares of the distances) from the last states of the trellis. | |
| logging_state_t | logging | 
| Error and flow logging control. | |
V.17 modem receive side descriptor. This defines the working state for a single instance of a V.17 modem receiver.
| float v17_rx_state_s::baud_phase | 
Baud phase for symbol sync.
Referenced by v17_rx_restart().
| int v17_rx_state_s::short_train | 
Scrambler tap.
TRUE if the short training sequence is to be used.
Referenced by v17_rx_init(), and v17_rx_restart().
| float v17_rx_state_s::symbol_sync_dc_filter[2] | 
DC filter for symbol sync.
Referenced by v17_rx_restart().
| float v17_rx_state_s::symbol_sync_high[2] | 
High band edge filter for symbol sync.
Referenced by v17_rx_restart().
| float v17_rx_state_s::symbol_sync_low[2] | 
Low band edge filter for symbol sync.
Referenced by v17_rx_restart().