Detector

The detector identifies significant peaks in the Range-Doppler domain by evaluating FFT magnitudes

against predefined or adaptive thresholds, and outputs peak indices and corresponding signal strength for further processing.

 

 

 

 

 

 

 

 

1. Peak Detector

A peak detector identifies local maxima in the Range or Range-Doppler domain by comparing signal amplitudes against neighboring bins or a fixed threshold.

It is computationally simple and low-power, making it suitable for low-cost radar SoCs, but its detection performance is sensitive to noise and interference.

 

Example Report of Peak Detector

The peak detector reports the strongest magnitude points in the Range-Doppler map

by selecting local maxima of the 2D FFT without applying noise-adaptive thresholding.

Item	Information obtained	Parameter
Peak existence	Strong peak in Range-Doppler map	DFFT_MAXm_*
Range index	Range FFT index of peak	DFFT_MAXm_RIDX
Doppler index	Doppler FFT index of peak	DFFT_MAXm_DIDX
Peak strength	2D FFT magnitude (modulus value)	DFFT_MAXm_VALUE
Max peaks	Multiple strongest FFT peaks	MAX0 ~ MAXm

 

 

 

 

 

 

2. CFAR Detector

A CFAR detector adaptively sets detection thresholds based on the estimated noise floor from surrounding reference cells in the Range or Range-Doppler map.

It provides robust target detection under varying noise and clutter conditions at the cost of higher computational complexity compared to simple peak detection

 

 

Example Report of Peak Detector

The CFAR detector applies adaptive thresholding based on surrounding noise statistics in the Range-Doppler domain

to suppress false alarms and outputs only peaks that satisfy the CFAR detection criteria.

 

 

Item	Information obtained	Parameter
Target existence	CFAR-detected target (pass/fail by CFAR)	CFAR_PMAXm_*
Range index	Range FFT index of CFAR peak	CFAR_PMAXm_ridx
Doppler index	Doppler FFT index of CFAR peak	CFAR_PMAXm_didx
Target strength	CFAR peak value (after CFAR processing)	CFAR_PMAXm_value
Max targets	Up to 4 CFAR peaks (PMAX3 ~ PMAX0)	PMAXm (4 zones)