arm_lms_norm_instance_q15 Struct Reference

Instance structure for the Q15 normalized LMS filter.

Data Fields
uint16_t	numTaps
q15_t *	pState
q15_t *	pCoeffs
q15_t	mu
uint8_t	postShift
const q15_t *	recipTable
q15_t	energy
q15_t	x0

Field Documentation

energy

q15_t energy

saves previous frame energy.

mu

q15_t mu

step size that controls filter coefficient updates.

numTaps

uint16_t numTaps

Number of coefficients in the filter.

pCoeffs

q15_t* pCoeffs

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

postShift

uint8_t postShift

bit shift applied to coefficients.

pState

q15_t* pState

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

recipTable

const q15_t* recipTable

Points to the reciprocal initial value table.

x0

q15_t x0

saves previous input sample.