ABSTRACT The performance of most angle estimation system degrades when the signal attributes coherency coupled with the high computational burden of the preprocessing technique. This paper addresses the issue of the computational burden of the coherent angle estimation for the bistatic multiple-input multiple-output (MIMO) radar. A modified spatial smoothing technique is initially developed by ensuring the generation of a lower rank kernel matrix of the decorrelated signal via a Nyström approach. Then the formed data matrix is subjected to the shift-invariance technique where the automatic pairing of the angles is estimated without loss of the virtual aperture. Hence, in addition to significantly reducing the computational complexity, the proposed method presents an improved performance against existing techniques verifiable by simulation results.

中文翻译：

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双基地 MIMO 雷达相干目标的改进空间平滑 Nystrom 方法

摘要当信号属性相干加上预处理技术的高计算负担时，大多数角度估计系统的性能会下降。本文解决了双基地多输入多输出 (MIMO) 雷达相干角估计的计算负担问题。改进的空间平滑技术最初是通过确保通过 Nyström 方法生成去相关信号的较低秩核矩阵来开发的。然后对形成的数据矩阵进行平移不变性技术，在不损失虚拟孔径的情况下估计角度的自动配对。因此，除了显着降低计算复杂度之外，所提出的方法还表现出相对于可通过仿真结果验证的现有技术的改进性能。