UWB MIMO穿墙雷达的阵列设计和成像方法

Array Design and Imaging Method for Ultra-wideband Multiple-input Multiple-output Through-the-wall Radar

利用多发多收(MIMO)方式对超宽带(UWB)穿墙成像雷达天线阵列进行稀疏化处理不失为一种很好的选择。该文从成像模型出发,分析了UWB MIMO天线阵的等效接收阵列问题,给出了基于空间卷积理论的UWBMIMO阵列设计方法,仿真验证了方法的有效性和在穿墙成像系统中应用的可行性。此外,提出了相干系数加权稳健Capon波束形成的自适应成像方法,理论分析和实验结果表明该方法能够获得较高的分辨率和图像信噪比。

The configuration of the Multiple-Input Multiple-Output （MIMO） array is a good choice for a sparse aperture array for Ultra-WideBand （UWB） through the wall imaging radar. According to the imaging model, an equivalent array for UWB MIMO antenna arrary is analyzed and a design approach for UWB MIMO arrary based on the principle of spatial convolution is given. Simulation results demostrate the effectiveness of the design approach and the feasibility of its application to through-the-wall imaging system. In addition, an adaptive imaging method using coherent coefficient weighting robust Capon beamforming is proposed. Both the theoretical analysis and the experimental results show that the proposed method can achieve high resolution and signal-to-noise ratio in the image.