CMSIS-DSP  Version 1.10.0
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arm_lms_norm_instance_q15 Struct Reference

Instance structure for the Q15 normalized LMS filter.

Data Fields

uint16_t numTaps
q15_t mu
uint8_t postShift
const q15_trecipTable
q15_t energy
q15_t x0

Field Documentation

q15_t energy

saves previous frame energy.

q15_t mu

step size that controls filter coefficient updates.

uint16_t numTaps

Number of coefficients in the filter.

q15_t* pCoeffs

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

uint8_t postShift

bit shift applied to coefficients.

q15_t* pState

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

const q15_t* recipTable

Points to the reciprocal initial value table.

q15_t x0

saves previous input sample.