arm_lms_norm_instance_q31 Struct Reference

Instance structure for the Q31 normalized LMS filter. More...

Data Fields
uint16_t	numTaps
q31_t *	pState
q31_t *	pCoeffs
q31_t	mu
uint8_t	postShift
const q31_t *	recipTable
q31_t	energy
q31_t	x0

Description

Instance structure for the Q31 normalized LMS filter.

Field Documentation

energy

q31_t energy

saves previous frame energy.

mu

q31_t mu

step size that controls filter coefficient updates.

numTaps

uint16_t numTaps

number of coefficients in the filter.

pCoeffs

q31_t* pCoeffs

points to the coefficient array. The array is of length numTaps.

postShift

uint8_t postShift

bit shift applied to coefficients.

pState

q31_t* pState

points to the state variable array. The array is of length numTaps+blockSize-1.

recipTable

const q31_t* recipTable

points to the reciprocal initial value table.

x0

q31_t x0

saves previous input sample.