基于LPFT的相控阵雷达信号盲分离

现代电子战中,雷达信号受到严重的干扰,使回波信号的提取愈发困难。跟据相控阵雷达天线阵列的特点,提出了基于局部多项式傅里叶变换(LPFT)的雷达信号盲源分离算法。选取线性调频信号(LFM)雷达信号作为发射信号,将雷达接收信号作为观测信号,应用LPFT进行时频变换,构造时频矩阵,采用联合近似对角化方法对受到干扰的雷达信号进行盲源分离。仿真结果表明,本方法有效得分离出了淹没在噪声和LFM调频干扰中的雷达回波信号。

Phased-array radar signal blind source separation based on LPFT

Severely in modern electronic warfare, the interference of radar signal, which makes the extraction of the echo signal more difficult. According to characteristics of phased array radar antenna arrays, proposed the radar signal blind source separation algorithm based on Local Polynomial Fourier Transform (LPFT). Using the LFM radar signal as transmitting signal, the radar receiving signal as the observed signal, then construct the time-frequency matrix by LPFT time-frequency transformation, separating the interference radar signal 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.