CMSIS-DSP: arm_lms_norm_instance_q15 Struct Reference

| CMSIS-DSP Version 1.8.0 CMSIS DSP Software Library

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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 * | pState
q15_t * | pCoeffs
q15_t | mu
uint8_t | postShift
const q15_t * | recipTable
q15_t | energy
q15_t | x0

## Field Documentation

q15_t arm_lms_norm_instance_q15::energy

saves previous frame energy.

q15_t arm_lms_norm_instance_q15::mu

step size that controls filter coefficient updates.

uint16_t arm_lms_norm_instance_q15::numTaps

Number of coefficients in the filter.

q15_t* arm_lms_norm_instance_q15::pCoeffs

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

uint8_t arm_lms_norm_instance_q15::postShift

bit shift applied to coefficients.

q15_t* arm_lms_norm_instance_q15::pState

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

const q15_t* arm_lms_norm_instance_q15::recipTable

Points to the reciprocal initial value table.

q15_t arm_lms_norm_instance_q15::x0

saves previous input sample.