Struct symsync_state_t¶

SymbolSync state. More...

#include <symsync_core.h>

Public Attributes¶

Type	Name
size_t	avgs
uint32_t	base_inc
double	bn
farrow_state_t	farrow
int	have_ontime
double	last_error
loop_filter_state_t	lf
lockdet_state_t	lock
size_t	lock_count
double	lock_stat
double	lock_sum
float _Complex	mid
float _Complex	prev_ontime
double	pwr_avg
double	rate_est
size_t	sps
int	ted
nco_state_t	timing
symsync_tlm_t	tlm
double	zeta

Detailed Description¶

Allocate with symsync_create(). Embeds the integer timing NCO, the Farrow interpolator and the PI loop filter by value; treat the TED history as internal.

Public Attributes Documentation¶

variable avgs¶

size_t symsync_state_t::avgs;

non-coherent block size (looks/decision).

variable base_inc¶

uint32_t symsync_state_t::base_inc;

nominal NCO inc (one wrap / symbol).

variable bn¶

double symsync_state_t::bn;

loop noise bandwidth (retained).

variable farrow¶

farrow_state_t symsync_state_t::farrow;

fractional interpolator.

variable have_ontime¶

int symsync_state_t::have_ontime;

a previous on-time sample exists.

variable last_error¶

double symsync_state_t::last_error;

last TED timing error.

variable lf¶

loop_filter_state_t symsync_state_t::lf;

2nd-order timing PI loop.

variable lock¶

lockdet_state_t symsync_state_t::lock;

decision rule: thresholds + verify counters stepped on lock_stat each avgs-look block.

variable lock_count¶

size_t symsync_state_t::lock_count;

looks accumulated in the current block.

variable lock_stat¶

double symsync_state_t::lock_stat;

last block-averaged lock_signal = mean(2*(|on-time|^2-|mid|^2) /(|on-time|^2+|mid|^2)) over avgs looks; compare against the configured threshold (see symsync_configure_lock).

variable lock_sum¶

double symsync_state_t::lock_sum;

running sum of lock_signal over the current avgs-symbol block (mirrors dll_state_t's lock_sum/lock_count/n_looks pattern).

variable mid¶

float _Complex symsync_state_t::mid;

mid-symbol (transition-gate) sample.

variable prev_ontime¶

float _Complex symsync_state_t::prev_ontime;

previous on-time interpolant.

variable pwr_avg¶

double symsync_state_t::pwr_avg;

running symbol power (TED normaliser).

variable rate_est¶

double symsync_state_t::rate_est;

smoothed tracked samples/symbol.

variable sps¶

size_t symsync_state_t::sps;

nominal samples per symbol.

variable ted¶

int symsync_state_t::ted;

SYMSYNC_TED_GARDNER / _DTTL.

variable timing¶

nco_state_t symsync_state_t::timing;

integer timing NCO (phase/phase_inc).

variable tlm¶

symsync_tlm_t symsync_state_t::tlm;

live telemetry attachment; zeroed in blobs

variable zeta¶

double symsync_state_t::zeta;

damping factor (retained).

The documentation for this class was generated from the following file native/inc/symsync/symsync_core.h