对空时二维自适应处理雷达的投散射宽时限扫频式干扰技术研究

发布时间：2019-06-29 20:58

【摘要】：针对传统干扰方法因干扰信号维度单一而难以在空时二维联合域对空时自适应处理器(Space-Time Adaptive Processing,STAP)产生有效干扰这一问题,提出了一种能覆盖整个空时二维平面的投散射宽时限扫频式干扰方法.该方法是向特定区域投射具有多普勒带宽的扫频信号,利用散射回波干扰STAP雷达.地形散射使干扰信号具有空时耦合特性,干扰信号空域连续,STAP处理器无法从空域识别抑制;宽时限扫频方式导致脉冲间多普勒频率存在差异,使雷达无法提取干扰信号多普勒频率,能占用处理器大量自由度.仿真结果表明,该方法产生的干扰功率谱能覆盖整个空时平面,使处理器自由度严重损失,导致STAP处理器性能下降,验证了该方法的有效性.
[Abstract]:In order to solve the problem that the traditional interference method is difficult to effectively interfere with the space-time adaptive processor (Space-Time Adaptive Processing,STAP) in the space-time two-dimensional connection domain because of the single dimension of the interference signal, a wide-time sweep interference method which can cover the whole space-time two-dimensional plane is proposed. In this method, the sweep signal with Doppler bandwidth is projected to a specific region, and the STAP radar is interfered with by scattering echo. Terrain scattering makes the interference signal space-time coupling, the interference signal is continuous in spatial domain, and the STAP processor can not recognize and suppress the interference signal from the spatial domain. The wide time-limited sweep mode leads to the difference of Doppler frequency between pulse, which makes the radar unable to extract the Doppler frequency of the interference signal and can occupy a large number of degrees of freedom of the processor. The simulation results show that the interference power spectrum generated by this method can cover the whole space-time plane, seriously lose the degree of freedom of the processor, and lead to the degradation of the performance of the STAP processor, which verifies the effectiveness of the method.
【作者单位】：合肥电子工程学院;中国电子科技集团公司第三十八研究所;
【基金】：安徽省自然科学基金(No.1408085MF111) 博士后基金(No.2014M552606);博士后基金特别资助(No.2015T81083)
【分类号】：TN974

【相似文献】