complex_dds.c File Reference

#include <stdio.h>
#include <inttypes.h>
#include <math.h>
#include "spandsp/telephony.h"
#include "spandsp/complex.h"
#include "spandsp/dds.h"

Defines
#define	M_PI   3.14159265358979323846
#define	SLENK   11
#define	SINELEN   (1 << SLENK)
#define	TWO32   4.294967296e9
Functions
int32_t	dds_phase_stepf (float frequency)
float	dds_scaling_dbm0f (float level)
float	dds_scaling_dbovf (float level)
float	ddsf (uint32_t *phase_acc, int32_t phase_rate)
	Generate a floating point tone sample.
float	dds_modf (uint32_t *phase_acc, int32_t phase_rate, float scale, int32_t phase)
	Generate a floating point tone sample, with modulation.
complex_t	dds_complexf (uint32_t *phase_acc, int32_t phase_rate)
	Generate a complex floating point tone sample.
complex_t	dds_complex_modf (uint32_t *phase_acc, int32_t phase_rate, float scale, int32_t phase)
	Generate a complex floating point tone sample, with modulation.

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Detailed Description

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Function Documentation

complex_t dds_complex_modf	(	uint32_t *	phase_acc,
		int32_t	phase_rate,
		float	scale,
		int32_t	phase
	)

Generate a complex floating point tone sample, with modulation.

Parameters:

	phase_acc	A pointer to a phase accumulator value.
	phase_rate	The phase increment to be applied.
	scale	The scaling factor.
	phase	The phase offset.

Returns:

The complex signal amplitude.

complex_t dds_complexf	(	uint32_t *	phase_acc,
		int32_t	phase_rate
	)

Generate a complex floating point tone sample.

Parameters:

	phase_acc	A pointer to a phase accumulator value.
	phase_rate	The phase increment to be applied.

Returns:

The complex signal amplitude, between -32767 and 32767.

float dds_modf	(	uint32_t *	phase_acc,
		int32_t	phase_rate,
		float	scale,
		int32_t	phase
	)

Generate a floating point tone sample, with modulation.

Parameters:

	phase_acc	A pointer to a phase accumulator value.
	phase_rate	The phase increment to be applied.
	scale	The scaling factor.
	phase	The phase offset.

Returns:

The signal amplitude.

float ddsf	(	uint32_t *	phase_acc,
		int32_t	phase_rate
	)

Generate a floating point tone sample.

Parameters:

	phase_acc	A pointer to a phase accumulator value.
	phase_rate	The phase increment to be applied.

Returns:

The signal amplitude, between -32767 and 32767.

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