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中文摘要：
在机载MIMO雷达体制下,针对严重非均匀环境（包括斜视阵和前视阵近程段）,提出了一种新的基于时域平滑的两级级联降维STAP方法,先后对杂波和孤立干扰进行抑制.第一级对少量独立同分布（IID）辅助样本进行平滑,用得到的所有样本估计杂波特性并用先时后空自适应级联处理器（称为mDT-SAP）中的3DT-SAP（简称3DT）方法进行抑制,第二级用待检测距离单元数据进行平滑估计孤立干扰特性并用3DT方法进行抑制.该方法克服了直接数据域（DDD）方法空时孔径损失大,误差鲁棒性差及没有充分利用统计信息的缺点,具有良好的性能.计算机仿真实验验证了其有效性和优越性.
英文摘要：
A two stage hybrid reduced rank STAP method is proposed for severely non-homogeneous environment in MIMO radar.It firstly suppresses the clutter and then rejects isolated interferers.In the first stage,forward/backward temporal smoothing technique is applied to the limited secondary samples to gain more samples from which clutter covariance matrix is estimated.And then 3DT or 3CAP method is used for clutter suppressing.In the second stage,upon applying forward/backward temporal smoothing technique to the sample obtained from the range gate of interest,the covariance matrix of isolated interferers can be estimated.Subsequently 3DT method is also made use of to reject isolated interferers.The presented method possesses small spatial temporal aperture loss,well robustness to errors and makes good use of statistical information.Computer simulations verify its validity and robustness.
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