cxvec_math.h File Reference

Osmocom Complex vectors math header. More...

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Enumerations
enum	osmo_cxvec_conv_type { CONV_FULL_SPAN , CONV_OVERLAP_ONLY , CONV_NO_DELAY }
	Various possible types of convolution span. More...
enum	osmo_cxvec_peak_alg { PEAK_WEIGH_WIN , PEAK_WEIGH_WIN_CENTER , PEAK_EARLY_LATE }
	Various possible peak finding algorithms. More...

Functions
static float	osmo_sinc (float x)
	Unnormalized sinc function. More...
static float	osmo_normsqf (float complex c)
	Squared norm of a given complex. More...
struct osmo_cxvec *	osmo_cxvec_scale (const struct osmo_cxvec *in, float complex scale, struct osmo_cxvec *out)
	Scale a complex vector (multiply by a constant) More...
struct osmo_cxvec *	osmo_cxvec_rotate (const struct osmo_cxvec *in, float rps, struct osmo_cxvec *out)
	Rotate a complex vector (frequency shift) More...
struct osmo_cxvec *	osmo_cxvec_delay (const struct osmo_cxvec *in, float delay, struct osmo_cxvec *out)
	Fractionally delay a vector while maintaining its length. More...
struct osmo_cxvec *	osmo_cxvec_convolve (const struct osmo_cxvec *f, const struct osmo_cxvec *g, enum osmo_cxvec_conv_type type, struct osmo_cxvec *out)
	Convolve two complex vectors. More...
struct osmo_cxvec *	osmo_cxvec_correlate (const struct osmo_cxvec *f, const struct osmo_cxvec *g, int g_corr_step, struct osmo_cxvec *out)
	Cross-correlate two complex vectors. More...
float complex	osmo_cxvec_interpolate_point (const struct osmo_cxvec *cv, float pos)
	Interpolate any fractional position in a vector using sinc filtering. More...
int	osmo_cxvec_peaks_scan (const struct osmo_cxvec *cv, int *peaks_idx, int N)
	Find the index of the N highest energy ( ) peaks. More...
float	osmo_cxvec_peak_energy_find (const struct osmo_cxvec *cv, int win_size, enum osmo_cxvec_peak_alg alg, float complex *peak_val_p)
	Find the maximum energy ( ) peak in a sequence. More...
struct osmo_cxvec *	osmo_cxvec_sig_normalize (const struct osmo_cxvec *sig, int decim, float freq_shift, struct osmo_cxvec *out)
	'Normalize' an IQ signal and apply decimation/frequency shift More...

Detailed Description

Osmocom Complex vectors math header.