Struct despreader_state_t¶

Despreader state. More...

#include <despreader_core.h>

Public Attributes¶

Type	Name
float complex	acc_e
float complex	acc_l
float complex	acc_p
uint8_t *	acq_code
size_t	acq_reps
size_t	acq_sf
double	car_phase
double	car_w
double	chip_pos
uint8_t *	code
double	code_rate
loop_filter_state_t	lf_car
loop_filter_state_t	lf_code
double	lock_metric
size_t	preamble_left
double	seed_chip
double	seed_w
size_t	sf
double	snr_est
size_t	sps
size_t	tsamps

Detailed Description¶

Allocate with despreader_create().

Public Attributes Documentation¶

variable acc_e¶

float complex despreader_state_t::acc_e;

early correlator accumulator.

variable acc_l¶

float complex despreader_state_t::acc_l;

late correlator accumulator.

variable acc_p¶

float complex despreader_state_t::acc_p;

prompt correlator accumulator.

variable acq_code¶

uint8_t* despreader_state_t::acq_code;

owned acq code, NULL if payload-only.

variable acq_reps¶

size_t despreader_state_t::acq_reps;

preamble periods to track before payload.

variable acq_sf¶

size_t despreader_state_t::acq_sf;

acq code length, chips/period.

variable car_phase¶

double despreader_state_t::car_phase;

current carrier phase, radians.

variable car_w¶

double despreader_state_t::car_w;

current carrier angular freq, rad/sample.

variable chip_pos¶

double despreader_state_t::chip_pos;

prompt code position within symbol, chips.

variable code¶

uint8_t* despreader_state_t::code;

owned spreading code, 0/1, length sf.

variable code_rate¶

double despreader_state_t::code_rate;

chips advanced per nominal chip (~1.0).

variable lf_car¶

loop_filter_state_t despreader_state_t::lf_car;

carrier (Costas) loop.

variable lf_code¶

loop_filter_state_t despreader_state_t::lf_code;

code (DLL) loop.

variable lock_metric¶

double despreader_state_t::lock_metric;

EMA of |Re P|/|P|, ~1 when phase-locked.

variable preamble_left¶

size_t despreader_state_t::preamble_left;

preamble periods still to consume.

variable seed_chip¶

double despreader_state_t::seed_chip;

create-time code phase, chips, for reset.

variable seed_w¶

double despreader_state_t::seed_w;

create-time carrier angular freq, rad/sample.

variable sf¶

size_t despreader_state_t::sf;

spreading factor = code length, chips/symbol.

variable snr_est¶

double despreader_state_t::snr_est;

EMA SNR estimate from the prompt symbols.

variable sps¶

size_t despreader_state_t::sps;

samples per chip (>= 2).

variable tsamps¶

size_t despreader_state_t::tsamps;

sf*sps, symbol period in samples.

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