sinefit.h File Reference

Least squares sinusoid fitting. More...

Go to the source code of this file.

Functions
int	SineFitClip (float *input, unsigned int size, float maxVal, float minVal, double f0, double fs, double *p_amplitude, double *p_phase, double *p_offset)
	Least squares sine fit of possibly clipped signal.
int	SineFit (float *input, unsigned int size, double f0, double fs, double *p_amplitude, double *p_phase, double *p_offset)
	Least squares sinusoid fit.

---

Detailed Description

Least squares sinusoid fitting.

---

Function Documentation

int SineFit	(	float *	input,
		unsigned int	size,
		double	f0,
		double	fs,
		double *	p_amplitude,
		double *	p_phase,
		double *	p_offset
	)

Least squares sinusoid fit.

Parameters:

[in]	input	float input samples
[in]	size	number of input samples
[in]	f0	sinusoid frequency
[in]	fs	sampling rate
[out]	p_amplitude	returned amplitude
[out]	p_phase	returned phase in radians
[out]	p_offset	returned DC offset

Apply least squares fit to determine the amplitude, phase, and DC-offset of a sinusoid WHOSE FREQUENCY IS KNOWN A PRIORI.

int SineFitClip	(	float *	input,
		unsigned int	size,
		float	maxVal,
		float	minVal,
		double	f0,
		double	fs,
		double *	p_amplitude,
		double *	p_phase,
		double *	p_offset
	)

Least squares sine fit of possibly clipped signal.

Parameters:

[in]	input	float input samples
[in]	size	number of input samples
[in]	maxVal	largest allowed value
[in]	minVal	smallest allowed value
[in]	f0	sinusoid frequency
[in]	fs	sampling rate
[out]	p_amplitude	returned amplitude
[out]	p_phase	returned phase in radians
[out]	p_offset	returned DC offset

Apply least squares fit to determine the amplitude, phase, and DC-offset of a sinusoid WHOSE FREQUENCY IS KNOWN A PRIORI. This function can also deal with clipped data, by ignoring clipped sample values in the least squares equation.