在非均匀环境下辅助通道法STAP处理的性能改善  

Improvement on the performance of the auxiliary channel STAPin the non-homogeneous environment

作　　者：王万林[1] 廖桂生[1] 张光斌[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：《西安电子科技大学学报》2004年第5期761-764,共4页Journal of Xidian University

基　　金："十五"国家部委电子预研基金(413070502);国家部委重点室基金联合资助项目

摘　　要：分析了相控阵机载预警雷达空时自适应处理在非均匀环境下的不足,即辅助通道中杂波干扰与检测通道中目标信号由于有限次样本而存在相关性,进而引起信号相消现象.提出了一种改进的空时自适应处理辅助通道杂波抑制技术,消除了目标信号对训练自适应权的不利影响,并给出了它的具体实现结构.该方法在抑制杂波时可有效克服目标信号相消现象,明显提高系统的检测性能,计算机仿真结果验证了其有效性.The auxiliary channel processing (AGP) is one of the reduced rank methods for space time adaptive processing (STAP) clutter mitigation. However, the AGP technique has an imperfection of signal self-nulling by the correlation between the clutter in the auxiliary channel and the signal in the main channel due to the limited samples in the non-homogeneous environments. Thus, a new method for clutter mitigation based on AGP for phased array airborne early warning (AEW) radar was proposed, which aims at avoiding the bad effect of the target signal in the adaptive weight training, and its detailed realization structure was also given. The new method is very robust whether the target exists or not, therefore greatly improving the target test performance. The final computation experiments also prove the effectiveness of the proposed method.

关 键 词：相控阵机载预警雷达 空时自适应处理 非均匀环境 辅助通道法 

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]