Struct costas_state_t¶

Costas loop state. More...

#include <costas_core.h>

Public Attributes¶

Type	Name
float complex	acc
size_t	acc_n
double	bn
double	bn_fll
int	have_prev
double	k_fll
double	last_error
loop_filter_state_t	lf
double	lock_metric
lo_state_t	nco
float complex	prev
double	seed_norm_freq
size_t	tsamps
double	zeta

Detailed Description¶

Allocate with costas_create(), or embed by value and costas_init(). The carrier NCO (nco) and PI loop (lf) are public sub-components so the inline composition helpers can drive them; treat the integrate-and-dump and diagnostic fields as internal.

Public Attributes Documentation¶

variable acc¶

float complex costas_state_t::acc;

running coherent I&D accumulator.

variable acc_n¶

size_t costas_state_t::acc_n;

samples accumulated into acc.

variable bn¶

double costas_state_t::bn;

PLL loop noise bandwidth (retained).

variable bn_fll¶

double costas_state_t::bn_fll;

FLL-assist bandwidth (0 = pure PLL).

variable have_prev¶

int costas_state_t::have_prev;

prev valid (skip FLL on the 1st symbol).

variable k_fll¶

double costas_state_t::k_fll;

derived FLL gain (per-symbol freq pull).

variable last_error¶

double costas_state_t::last_error;

last PLL discriminator (loop stress).

variable lf¶

loop_filter_state_t costas_state_t::lf;

2nd-order carrier PI loop (PLL).

variable lock_metric¶

double costas_state_t::lock_metric;

EMA of |Re P|/|P| (1 = locked).

variable nco¶

lo_state_t costas_state_t::nco;

integer carrier NCO (uint32 phase).

variable prev¶

float complex costas_state_t::prev;

previous symbol's prompt (FLL cross).

variable seed_norm_freq¶

double costas_state_t::seed_norm_freq;

create-time carrier freq, for reset.

variable tsamps¶

size_t costas_state_t::tsamps;

samples per symbol (integrate-and-dump).

variable zeta¶

double costas_state_t::zeta;

damping factor (retained).

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