DPU_RangeProcHWA_FFTtuning Struct Reference

Detailed Description

rangeProc FFT tuning parameters for HWA based Range FFT

This structure allows users to tune the scaling factors for HWA based Range FFTs

Data Fields
uint16_t	fftOutputDivShift
	Specify amount of right (divide) shift to apply to convert HWA internal 24-bit Range FFT output to 16-bit RadarCube. User should adjust this based on the setup where sensor is deployed and sensors setting for Tx O/P power/RX gain and their application needs. More...
uint16_t	numLastButterflyStagesToScale
	Specify number of Last butterfly stages to scale to avoid clipping within HWA FFT stages. Given the ADC data bit width of 16-bits and internal 24-bit width of HWA, user has around 8-bits to grow Range FFT output and should not need to use butterfly scaling for FFT sizes upto 256. Beyond that fft size, user should adjust this based on the setup where sensor is deployed and sensors setting for Tx O/P power/RX gain. More...

Field Documentation

fftOutputDivShift

uint16_t DPU_RangeProcHWA_FFTtuning::fftOutputDivShift

Specify amount of right (divide) shift to apply to convert HWA internal 24-bit Range FFT output to 16-bit RadarCube. User should adjust this based on the setup where sensor is deployed and sensors setting for Tx O/P power/RX gain and their application needs.

numLastButterflyStagesToScale

uint16_t DPU_RangeProcHWA_FFTtuning::numLastButterflyStagesToScale

Specify number of Last butterfly stages to scale to avoid clipping within HWA FFT stages. Given the ADC data bit width of 16-bits and internal 24-bit width of HWA, user has around 8-bits to grow Range FFT output and should not need to use butterfly scaling for FFT sizes upto 256. Beyond that fft size, user should adjust this based on the setup where sensor is deployed and sensors setting for Tx O/P power/RX gain.