基于极化分集接收的HRRP欺骗干扰鉴别

Discrimination of HRRP deception jamming based on polarization diversity receiving

有源宽带欺骗干扰能够生成虚假高分辨距离像(high resolution range profile,HRRP),严重影响成像雷达的目标特征提取与识别。为此,研究了基于极化分集接收的HRRP欺骗干扰鉴别方法。首先,建立了目标回波和欺骗干扰的正交极化宽带响应模型,分析了两者的极化相关特性差异;然后,利用正交极化HRRP之间的互相关系数作为鉴别量,提出了相应的鉴别算法;最后,利用飞机缩比模型及干扰机天线的暗室测量数据进行仿真实验。实验结果表明:在一定信噪比(signal-to-noise ratio,SNR)及鉴别门限条件下,正确鉴别概率将大于90%,验证了算法的有效性。

Active wideband deception jamming which can synthesize the false high resolution range profile（HRRP） sets great challenges for target feature extraction and recognition.As a result,a false HRRP discrimination method is studied based on polarization diversity receiving.The orthogonal polarization wideband response models of target echo and deception jamming are established,and their polarization correlation characteristic differences are especially analyzed.Then a discrimination algorithm is presented by taking the correlation coefficient between two complex HRRPs in orthogonal polarization channels as a discriminator.Simulations are performed using the measured data of the airplane scaled model and jammer antenna in anechoic chamber.Results show that the correct discrimination probability can be higher than 90% for certain values of signal-to-noise ratio（SNR） and discrimination threshold,which verifies the validity of this algorithm.