DSPF_sp_lms2
[Adaptive filtering]

Collaboration diagram for DSPF_sp_lms2:

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Detailed Description

float	DSPF_sp_lms (const float *x, float *restrict h, const float *y_i, float *restrict y_o, const float ar, float error, const int nh, const int nx)

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Function Documentation

float DSPF_sp_lms	(	const float *	x,
		float *restrict	h,
		const float *	y_i,
		float *restrict	y_o,
		const float	ar,
		float	error,
		const int	nh,
		const int	nx
	)

The DSPF_sp_lms implements an LMS adaptive filter. Given an actual input signal and a desired input signal, the filter produces an output signal, the final coefficient values, and returns the final output error signal.

Parameters:

	x	Pointer to input samples
	h	Pointer to the coefficient array
	y_i	Pointer to the desired output array
	y_o	Pointer to filtered output array
	ar	Adaptation rate
	error	Initial error
	nh	Number of coefficients
	nx	Number of output samples

Algorithm:

DSPF_sp_lms2_cn.c is the natural C equivalent of the optimized intrinsic C code without restrictions note that the intrinsic C code is optimized and restrictions may apply.

Assumptions:

nh must be a multiple of 4 and >= 4.
The coefficient array is assumed to be in reverse order; i.e., h(nh-1), h(nh-2), ..., h(0) will hold coefficients h0, h1, ..., hnh-1, repectively.

Implementation notes:

Endian Support: The code supports both big and little endian modes.
Interruptibility: The code is interruptible.

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Copyright 2014, Texas Instruments Incorporated