# arm_lms_norm_instance_q31 Struct Reference

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

`#include <arm_math.h>`

## Data Fields

uint16_t | numTaps
q31_t * | pState
q31_t * | pCoeffs
q31_t | mu
uint8_t | postShift
q31_t * | recipTable
q31_t | energy
q31_t | x0

## Detailed Description

Instance structure for the Q31 normalized LMS filter.

Definition at line 4105 of file arm_math.h.

## Field Documentation

uint16_t arm_lms_norm_instance_q31::numTaps

number of coefficients in the filter.

Definition at line 4107 of file arm_math.h.

q31_t* arm_lms_norm_instance_q31::pState

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

Definition at line 4108 of file arm_math.h.

q31_t* arm_lms_norm_instance_q31::pCoeffs

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

Definition at line 4109 of file arm_math.h.

q31_t arm_lms_norm_instance_q31::mu

step size that controls filter coefficient updates.

Definition at line 4110 of file arm_math.h.

uint8_t arm_lms_norm_instance_q31::postShift

bit shift applied to coefficients.

Definition at line 4111 of file arm_math.h.

q31_t* arm_lms_norm_instance_q31::recipTable

points to the reciprocal initial value table.

Definition at line 4112 of file arm_math.h.

q31_t arm_lms_norm_instance_q31::energy

saves previous frame energy.

Definition at line 4113 of file arm_math.h.

q31_t arm_lms_norm_instance_q31::x0

saves previous input sample.

Definition at line 4114 of file arm_math.h.

The documentation for this struct was generated from the following file:

- arm_math.h

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