摘要
传统二维空时自适应处理(2D-STAP)利用与待检测单元相邻单元的独立同分布杂波样本估计待检测单元的杂波特性.而许多实际应用情况中(如前向阵),杂波谱分布随距离(俯仰角)变化而变化,杂波统计特性与距离(俯仰角)相关,呈现非均匀性,2D-STAP方法性能严重下降.本文首先对非正侧面阵配置所产生的与俯仰角相关的杂波分布规律进行了分析,然后对3D-STAP方法能有效解决与俯仰角相关的杂波非均匀问题的本质机理进行了研究,最后通过仿真实验从杂波抑制性能和运算量两个方面,论证了非均匀杂波环境下3D-STAP方法的综合性能.
The traditional 2-dimensional （2D） space-time adaptive processing （STAP） estimates the clutter statistics at a range cell under test （CUT） from the training data （TD） at adjacent range cells, which submit to independent and identical distributing （HI））. However, in some applications （e. g. forward-looking arrays）, the clutter spectrum distribution varies as the range （elevation angle） varies,i.e.the clutter statistics has a dependence on range, which is call non-stationary clutter and will degrade the performance of 2D-STAP. This paper firstly analyzes the distribution regulation of the non-stationary clutter caused by the non- sidelooking planar array configurations,and then studies the essential reason why 3D-STAP can effectively settle the elevation-dependent clutter non-stationadty, and finally by computer simulations, demonstrates the integrated performance of 3D-STAP in the non-stationary clutter environment from two aspects： the clutter suppression capability and the computational load.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2009年第4期868-872,共5页
Acta Electronica Sinica
基金
国家自然科学基金重点项目(No.60736009)
关键词
3D
STAP
非均匀杂波
非正侧面阵
3-dimensional （3D）
space-time adaptive processing （STAP）
non-stationary clutter
non- sidelooking arrays
