Phased-Array Radar Signal Blind Source Separation Based on LPFT
Lian Jia · Dianzi qijian · 2014
There exists the interference of radar signal severely in modern electronic warfare,which makes the extraction of the echo signal more difficult.According to characteristics of phased array radar antenna arrays,the radar signal blind source separation algorithm was proposed based on Local Polynomial Fourier Transform(LPFT).Using the LFM radar signal as transmitting signal,the radar receiving signal as the observed signal,then the time-frequency matrix was constructed by LPFT time-frequency transformation,and the interference radar signal was sepesaled by blind source separation which using the joint approximate diagonalization algorithm.The simulation results show that this method is effective to isolate the radar echo signal submerged in the noise and interference signal.