V4.0.1 of the ARM CMSIS DSP libraries. Note that arm_bitreversal2.s, arm_cfft_f32.c and arm_rfft_fast_f32.c had to be removed. arm_bitreversal2.s will not assemble with the online tools. So, the fast f32 FFT functions are not yet available. All the other FFT functions are available.

Dependents:   MPU9150_Example fir_f32 fir_f32 MPU9150_nucleo_noni2cdev ... more

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arm_lms_norm_instance_q31 Struct Reference

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
 number of coefficients in the filter.
q31_t * pState
 points to the state variable array.
q31_t * pCoeffs
 points to the coefficient array.
q31_t mu
 step size that controls filter coefficient updates.
uint8_t postShift
 bit shift applied to coefficients.
q31_t * recipTable
 points to the reciprocal initial value table.
q31_t energy
 saves previous frame energy.
q31_t x0
 saves previous input sample.

Detailed Description

Instance structure for the Q31 normalized LMS filter.

Definition at line 4274 of file arm_math.h.


Field Documentation

q31_t energy

saves previous frame energy.

Definition at line 4282 of file arm_math.h.

q31_t mu

step size that controls filter coefficient updates.

Definition at line 4279 of file arm_math.h.

uint16_t numTaps

number of coefficients in the filter.

Definition at line 4276 of file arm_math.h.

q31_t* pCoeffs

points to the coefficient array.

The array is of length numTaps.

Definition at line 4278 of file arm_math.h.

uint8_t postShift

bit shift applied to coefficients.

Definition at line 4280 of file arm_math.h.

q31_t* pState

points to the state variable array.

The array is of length numTaps+blockSize-1.

Definition at line 4277 of file arm_math.h.

q31_t* recipTable

points to the reciprocal initial value table.

Definition at line 4281 of file arm_math.h.

q31_t x0

saves previous input sample.

Definition at line 4283 of file arm_math.h.