相比单元级密集多输入多输出(MIMO)阵列的处理复杂度,子阵级密集MIMO 阵列更具工程应用前景。针对已有文献分析均基于单元级密集MIMO 阵列的不足,文中首先理论推导出了子阵级密集MIMO 阵列的归一化方向图函数,然后阐述了其与单元级密集MIMO 阵列在虚拟孔径形成上的本质差异,并分别与单元级密集MIMO 阵列和相控阵(PA)进行了信噪比、测角精度和角分辨率等性能的对比分析,最后搭建试验平台验证了理论分析的正确性。

Compared with the processing complexity of unit level co-located multiple input multiple output (MIMO) array, subarray level co-located MIMO array have more promising engineering applications. In view of the shortcomings of existing literature analysis based on cell level co-located MIMO array, the normalized antenna pattern function of co-located MIMO radar at subarray level is derived theoretically. Then, the essential differences in virtual aperture formation between subarray level co-located MIMO array and unit level co-located MIMO array is researched. The performance such as signal-to-noise ratio, angle measurement accuracy and angular resolution is compared between subarray level co-located MIMO array, cell level co-located MIMO array and phased array (PA) too. Finally, an experimental platform was built to verify the correctness of the theoretical analysis.

TN957