极化调制假目标干扰的鉴别

Polarization Discrimination between Modulation Polarization Decoy and Radar Target

采用数字射频存储器(DRFM)技术的转发式假目标干扰对雷达构成了日益严重的威胁,利用极化信息对真、假目标进行鉴别进而剔除假目标,是对抗假目标干扰的一种有效途径。目前的极化鉴别方法只对脉内极化恒定的假目标干扰有效,为此,本文专门研究了真实目标和脉内极化调制假目标的鉴别方法。首先设计了一种对来波极化矢量进行张量积接收的处理方式,目标回波矢量经此处理后,汇聚于四维复空间中一点,而假目标干扰则无规律地散布在该空间中,利用这种差异,以矩阵间的散度作为鉴别统计量设计了鉴别算法。仿真实验结果及分析结论表明,本文方法对真实目标和脉内极化调制假目标均具有较高的鉴别率。

The repeater decoy using DRFM technology is a great threat to radar increasingly. It＇ s an available approach which discriminate and eliminate decoy by using the different polarization character of target and decoy. But actual polarization discrimination methods are available only for the decoys with invariable polarization state in the pulse-width. Discrimination method between modulation polarization decoy and radar target is studied in the paper. At first, a new polarization processing manner is proposed which based on tensor product receiving of the incident wave vector. After this process, the target echo vectors are transformed to one point in the four-dimensional space, but the decoy vectors diffuse in the space desultorily. With this difference, the discrimination Algorithm is designed using the divergence of matrices. The simulation results and analysis conclusion demonstrate the method in this paper is effective on the discrimination of radar target and modulation polarization decoy.