基于直接数据域的三维空时自适应杂波抑制  

On Three Dimensional Temporal-Spatial Adaptive Processing Based on Direct Data Domain for Clutter Suppression

作　　者：王万林[1] 王洪洋[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,西安710071

出　　处：《宇航学报》2006年第B12期83-88,共6页Journal of Astronautics

基　　金：“十五”军事电子预研基金（413070502）;武器装备预研基金（51407030101DZ01）

摘　　要：在相控阵机载预警（AEW）雷达杂波抑制中三维空时白适应处理（3D-STAP）的性能最优，然而，三维处理存在两个方面的缺点：一是自适应权的计算量较大，二是估计杂波协方差矩阵时需要大量的训练样本（这在实际非均匀环境中很难满足），因而无法应用。先时后空白适应处理（T-SAP）不但计算量低，而且性能接近最优。现提出了一种基于直接数据域（DDD）的三维先时后空白适应处理（3D-T-SAP）方法，即先对每个二维空域通道用具有超低旁瓣的多普勒滤波器将杂波作局域化预处理，再对各个或相邻几个多普勒通道的输出作基于直接数据域的二维空域白适应处理。此外，由于该方法对阵元误差比较敏感，因此还提出了一种实用的误差校正方法。计算机仿真结果验证了该方法的有效性。The three dimensional space time adaptive processing （3D-STAP） has the best performance in phased array airborne early warning （AEW） radar. Unfortunately, the 3D-STAP is hard to apply in real systems because of its two disadvantages, which one is the intensive computational load, the other one is the abundant train samples with independently and identically distributed （IID） properties that is hard to be satisfied in non-homogeneous environment. While, temporal-spatial adaptive processing （T-SAP） has not only the less computational load, but also the performance approaching the optimum one. Thus, a new three dimensional temporal-spatial adaptive processing （3D-T-SAP） based on direct data domain （DDD） was presented in this paper, which the output of each or several contiguous Doppler channels were performed in two dimensional space adaptive processing based on DDD after filtering with super low sidelobe level. Besides, a pragmatic approach to correct the element＇ s amplitude and phase errors for this method by using the measured steer vector was also proposed too. The final computational results of simulate and real data also verified the effectiveness of the proposed method.

关 键 词：相控阵AEW雷达 三维空时白适应处理 三维先时后空白适应处理 直接数据域 杂波抑制 

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]