Research of CMLD-CFAR Detecting Algorithm in Radar Reconnaissance Receiver

摘要

In radar signal reconnaissance digital receiver based on DFT (Discrete Fourier Transform), automatic CFAR (Constant False Alarm Rate) detection in frequency domain is necessary in processing of peak-seek algorithm. A CMLDCFAR (Censored Mean Level Detector CFAR) algorithm in frequency domain is presented. By researching the threshold generating algorithm of pulse radar signals' spectrum under clutter background, a threshold generating algorithm based on the structure of CMLD-CFAR detector is provided, the detection probability and false alarm rate of the algorithm under the nominal factor T is derived in detail. At last, confirms the validity of the algorithm via computer simulation.