CMSIS-DSP: arm_fir_sparse_instance_q31 Struct Reference

| CMSIS-DSP Version 1.5.2 CMSIS DSP Software Library

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arm_fir_sparse_instance_q31 Struct Reference

Instance structure for the Q31 sparse FIR filter.

## Data Fields
uint16_t | numTaps
uint16_t | stateIndex
q31_t * | pState
q31_t * | pCoeffs
uint16_t | maxDelay
int32_t * | pTapDelay

## Field Documentation

uint16_t arm_fir_sparse_instance_q31::maxDelay

maximum offset specified by the pTapDelay array.

Referenced by arm_fir_sparse_init_q31(), and arm_fir_sparse_q31().

uint16_t arm_fir_sparse_instance_q31::numTaps

number of coefficients in the filter.

Referenced by arm_fir_sparse_init_q31(), and arm_fir_sparse_q31().

q31_t* arm_fir_sparse_instance_q31::pCoeffs

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

Referenced by arm_fir_sparse_init_q31(), and arm_fir_sparse_q31().

q31_t* arm_fir_sparse_instance_q31::pState

points to the state buffer array. The array is of length maxDelay+blockSize-1.

Referenced by arm_fir_sparse_init_q31(), and arm_fir_sparse_q31().

int32_t* arm_fir_sparse_instance_q31::pTapDelay

points to the array of delay values. The array is of length numTaps.

Referenced by arm_fir_sparse_init_q31(), and arm_fir_sparse_q31().

uint16_t arm_fir_sparse_instance_q31::stateIndex

state buffer index. Points to the oldest sample in the state buffer.

Referenced by arm_fir_sparse_init_q31(), and arm_fir_sparse_q31().