CMSIS-DSP  Verison 3.0
CMSIS DSP Software Library
arm_cfft_radix4_instance_q31 Struct Reference

Instance structure for the Q31 CFFT/CIFFT function.

Data Fields

uint16_t fftLen
uint8_t ifftFlag
uint8_t bitReverseFlag
q31_t * pTwiddle
uint16_t * pBitRevTable
uint16_t twidCoefModifier
uint16_t bitRevFactor

Field Documentation

flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.

bit reversal modifier that supports different size FFTs with the same bit reversal table.

length of the FFT.

flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.

points to the bit reversal table.

points to the twiddle factor table.

twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.