agc.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "agc.h"

Include dependency graph for agc.c:

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Data Structures
struct	s_agc
Typedefs
typedef double(*	agc_algorithm )(agc gain_object, double current_amplitude)
Functions
static double	agc_update_1 (agc gain_object, double current_amplitude)
static double	agc_update_2 (agc gain_object, double current_amplitude)
static double	agc_update_3 (agc gain_object, double current_amplitude)
static double	agc_update_4 (agc gain_object, double current_amplitude)
agc	agc_create (double max_gain, double min_gain, double noise_floor, double max_amp, te_agc_types agc_type, double gain_increase_correct, double gain_decrease_correct)
double	agc_update (agc gain_object, double current_amplitude)
void	agc_destroy (agc *gain_object)
Variables
static const agc_algorithm	AGC_ALGOR_TABLE [AGC_NUMBER_OF_ADJUSTMENT_TYPES]

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Typedef Documentation

typedef double(* agc_algorithm)(agc gain_object, double current_amplitude)

Definition at line 59 of file agc.c.

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Function Documentation

agc agc_create	(	double	max_gain,
		double	min_gain,
		double	noise_floor,
		double	max_amp,
		te_agc_types	agc_type,
		double	gain_increase_correct,
		double	gain_decrease_correct
	)

Creates, and returns a pointer to an agc object.

See also:

agc_destroy

Parameters:

	max_gain	The maximum gain of the agc object.
	min_gain	The minimum gain of the agc object.
	noise_floor	The minimum amplitude required to compute a ngew gain.
	max_amp	The maximum amplitude desired.
	agc_type	The type of AGC gain correction.
	gain_increase_correct	The factor by which the gain will be increased.
	gain_decrease_correct	The factor by which the gain will be decreased.

Definition at line 73 of file agc.c.

References AGC_LINEAR_PEAK_LIMIT, AGC_NUMBER_OF_ADJUSTMENT_TYPES, s_agc::agc_type, s_agc::gain, s_agc::gain_decrease_correction_factor, s_agc::gain_increase_correction_factor, s_agc::max_amp, s_agc::maximum_gain, s_agc::minimum_gain, and s_agc::noise_floor.

Referenced by morse_start_threads().

void agc_destroy

(

agc *

gain_object

)

De-allocates the automatic gain object.

Parameters:

gain_object

Pointer to the gain object to destroy.

See also:

agc

agc_create

Definition at line 179 of file agc.c.

Referenced by free_all().

double agc_update	(	agc	gain_object,
		double	current_amplitude
	)

Updates the agc gain, returns the new gain.

See also:

agc_create

Parameters:

	gain_object	Automatic gain control object.
	current_amplitude	The current amplitude.

Definition at line 103 of file agc.c.

References AGC_ALGOR_TABLE, and s_agc::agc_type.

Referenced by morse_create_fft_amp_array().

static double agc_update_1	(	agc	gain_object,
		double	current_amplitude
	)			[static]

Definition at line 108 of file agc.c.

References s_agc::gain, s_agc::gain_decrease_correction_factor, s_agc::gain_increase_correction_factor, s_agc::max_amp, and s_agc::maximum_gain.

static double agc_update_2	(	agc	gain_object,
		double	current_amplitude
	)			[static]

Definition at line 121 of file agc.c.

References s_agc::gain, s_agc::gain_decrease_correction_factor, s_agc::gain_increase_correction_factor, s_agc::max_amp, s_agc::maximum_gain, s_agc::minimum_gain, and s_agc::noise_floor.

static double agc_update_3	(	agc	gain_object,
		double	current_amplitude
	)			[static]

Definition at line 144 of file agc.c.

References s_agc::gain, s_agc::gain_decrease_correction_factor, s_agc::gain_increase_correction_factor, s_agc::max_amp, and s_agc::maximum_gain.

static double agc_update_4	(	agc	gain_object,
		double	current_amplitude
	)			[static]

Definition at line 161 of file agc.c.

References s_agc::gain, s_agc::gain_increase_correction_factor, s_agc::max_amp, and s_agc::maximum_gain.

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Variable Documentation

const agc_algorithm AGC_ALGOR_TABLE[AGC_NUMBER_OF_ADJUSTMENT_TYPES] [static]

Initial value:

 {
    agc_update_1, 
    agc_update_2, 
    agc_update_3, 
    agc_update_4  
}

Definition at line 66 of file agc.c.

Referenced by agc_update().