The design of frequency domain CFAR detector based on large- points DFT

In the design of radar reconnaissance receiver ,in view of the requirement of automatic detection of pulse radar signal´s CFAR (Constant False Alarm Rate) a pulsed radar signal´s DFT (Discrete Fourier Transform) spectrum detection algorithm with the function of CFAR is presented. By researching the algorithm of threshold generating of pulsed radar signals´ spectrum detection in clutter background, present a threshold generating algorithm based on the structure of CMLD (Censored Mean Level Detector) CFAR detector, and illuminate the detection probability and false alarm rate of the algorithm under the nominal factor T in detail. At last, confirm the validity of the CFAR detector.