Digital Receiving and Its Fast Algorithm in Pseudo-random Code CW Radar
YU Qunning · Modern Electronics Technique · 2008
Multi-channel correlators are widely used in traditional pseudo-random code CW(PRC-CW) radar,which makes the ranging system more complicated.This paper proposes a method of digitalizing the return signal directly and then convoluting the signals on DSP,which can replace multi-channel correlation in analog circuit.But the computation of convolution is too huge for the DSP to fulfill.To solve this problem,this paper analyzes five fast algorithms including FFT,and then chooses one according to the characters of PRC-CW radars.The digital method and fast algorithm have been verified by simulated signal and real signal.