v22bis_state_t Struct Reference

#include <v22bis.h>

List of all members.

Public Attributes
int	bit_rate
	The bit rate of the modem. Valid values are 1200 and 2400.
int	caller
	TRUE is this is the calling side modem.
put_bit_func_t	put_bit
	The callback function used to put each bit received.
get_bit_func_t	get_bit
	The callback function used to get the next bit to be transmitted.
void *	user_data
	A user specified opaque pointer passed to the callback routines.
struct {
float   rrc_filter [2 *V22BIS_RX_FILTER_STEPS]
	The route raised cosine (RRC) pulse shaping filter buffer.
int   rrc_filter_step
	Current offset into the RRC pulse shaping filter buffer.
unsigned int   scramble_reg
	The register for the data scrambler.
int   scrambler_pattern_count
	A counter for the number of consecutive bits of repeating pattern through the scrambler.
int   training
	0 if receiving user data. A training stage value during training
int   training_count
	A count of how far through the current training step we are.
int   signal_present
	>0 if a signal above the minimum is present. It may or may not be a V.22bis signal.
float   training_error
	A measure of how much mismatch there is between the real constellation, and the decoded symbol positions.
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).
float   carrier_track_p
	The proportional part of the carrier tracking filter.
float   carrier_track_i
	The integral part of the carrier tracking filter.
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.
power_meter_t   rx_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.
float   agc_scaling
	The scaling factor accessed by the AGC algorithm.
int   constellation_state
float   eq_delta
	The current delta factor for updating the equalizer coefficients.
complexf_t   eq_coeff [2 *V22BIS_EQUALIZER_LEN+1]
complexf_t   eq_buf [V22BIS_EQUALIZER_MASK+1]
int   eq_step
	Current offset into the equalizer buffer.
int   eq_put_step
	Current write offset into the equalizer buffer.
int   gardner_integrate
	Integration variable for damping the Gardner algorithm tests.
int   gardner_step
	Current step size of Gardner algorithm integration.
int   total_baud_timing_correction
	The total symbol timing correction since the carrier came up. This is only for performance analysis purposes.
int   baud_phase
	The current fractional phase of the baud timing.
int   sixteen_way_decisions
}	rx
struct {
float   gain
	The gain factor needed to achieve the specified output power.
complexf_t   rrc_filter [2 *V22BIS_TX_FILTER_STEPS]
	The route raised cosine (RRC) pulse shaping filter buffer.
int   rrc_filter_step
	Current offset into the RRC pulse shaping filter buffer.
unsigned int   scramble_reg
	The register for the data scrambler.
int   scrambler_pattern_count
	A counter for the number of consecutive bits of repeating pattern through the scrambler.
int   training
	0 if transmitting user data. A training stage value during training
int   training_count
	A counter used to track progress through sending the training sequence.
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).
uint32_t   guard_phase
	The current phase of the guard tone (i.e. the DDS parameter).
int32_t   guard_phase_rate
	The update rate for the phase of the guard tone (i.e. the DDS increment).
float   guard_level
int   baud_phase
	The current fractional phase of the baud timing.
int   constellation_state
	The code number for the current position in the constellation.
int   shutdown
	An indicator to mark that we are tidying up to stop transmission.
get_bit_func_t   current_get_bit
	The get_bit function in use at any instant.
}	tx
int	detected_unscrambled_ones
int	detected_unscrambled_zeros
int	detected_unscrambled_ones_or_zeros
int	detected_unscrambled_0011_ending
int	detected_scrambled_ones_or_zeros_at_1200bps
int	detected_scrambled_ones_at_2400bps
logging_state_t	logging
	Error and flow logging control.

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Detailed Description

V.22bis modem descriptor. This defines the working state for a single instance of a V.22bis modem.

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Member Data Documentation

int v22bis_state_t::training

0 if receiving user data. A training stage value during training

0 if transmitting user data. A training stage value during training

Referenced by v22bis_rx(), and v22bis_rx_restart().

int v22bis_state_t::training_count

A count of how far through the current training step we are.

A counter used to track progress through sending the training sequence.

Referenced by v22bis_rx_restart().

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The documentation for this struct was generated from the following file:

• v22bis.h