机载预警雷达三维空时自适应处理及其降维研究  

Study on three dimensional space-time optimum and suboptimum processing for airborne early warning radar

作　　者：王万林[1] 廖桂生[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2005年第3期431-434,共4页Systems Engineering and Electronics

基　　金："十五"军事电子预研基金(413070502);武器装备预研基金(51407030101DZ01)资助课题

摘　　要：分析了AEW雷达系统中实际存在的阵元幅相误差对二维空时自适应处理(2D STAP)性能的影响。提出了一种更加稳健的三维空时自适应处理(3D STAP)技术,补偿因存在阵元幅相误差而导致各列子阵俯仰方向图的不一致性。为了降低计算量,还提出了一种三维先时后空自适应处理(3D T SAP)的准最优技术。对仿真数据和某实测数据的处理结果证明三维处理具有优良的性能和很强的误差容错能力。The impact of the real airborne early warning (AEW) radar system's element amplitude and phase errors on the two-dimensional (2-D) space-time adaptive processor's (STAP) performance is analyzed. A new kind of robust three-dimensional (3-D) space-time adaptive processor is given, which is aimed at compensating the discrepancy of column subarray pitching patterns resulting from the amplitude and phase errors. The 3-D processor is also extended to suboptimum STAP techniques such as mDTSAP. It is verified by the numerical simulations and MCARM data that 3-D processor has a good performance and a perfect tolerant ability to errors. In a real AEW radar system, the degree of freedom (DOF) in space and time, especially in space is very limited. Fortunately, it is also shown by the numerical experiment of the MCARM data that the 3-D 3DT-SAP is very helpful to reduce the loss of DOF in space, and more important, the computation load of three-dimensional 3DT-SAP required is tolerated in a real radar system. Thus 3-D sub-optimum processor has a practical value.

关 键 词：机载预警雷达 三维空时自适应处理 杂波抑别 

分 类 号：TN957.51[电子电信—信号与信息处理] TN959.73[电子电信—信息与通信工程]