中文摘要：

本文研究了基于GLRT的机载MIMO雷达自适应目标检测问题.针对参考单元数据不足对GLRT性能的影响,提出了基于对角加载的MIMO雷达GLRT（MIMO-LGLRT）检测器,并对其检测性能进行了分析,给出了虚警概率和检测概率的闭合表达式.该检测器充分利用机载MIMO雷达杂波子空间低秩的特点和对角加载技术,解决了因参考数据不足所引起的矩阵病态问题.为了减少MIMO-LGLRT检测器的运算量,在分析杂波协方差矩阵块对角化特性的基础上,给出一种简化MIMO-LGLRT检测器.理论分析和仿真结果表明,上述两种检测器相对于杂波协方差矩阵都具有恒虚警特性,检测性能优于普通GLRT检测器.

英文摘要：

The generalized likelihood ratio test detector（GLRTD） for the airborne MIMO radars was studied in the paper.It is well-known that the GLRTD performs poorly in the case of limited secondary data.To settle this problem,the GLRTD with diagonal loading（LGLRTD） was proposed exploiting the low-rank property of MIMO radar clutter subspace and the diagonal loading techniques.The closed-form detection probability and false alarm probability were derived.To reduce the computational load of the proposed detector, a simplified detector was introduced by considering the block-diagonal property of the clutter covariance malliX. Theoretical and simulation results showed that the proposed detectors had CFAR with respect to the covariance matrix of clutter, and were superior to the conventional GLRT detectors.