超宽带穿墙雷达稳健波束域高分辨成像方法

High resolution imaging approach for ultra-wideband through-the-wall radar based on robust beamspace

以实现超宽带穿墙雷达目标高分辨为目的,提出了稳健波束域高分辨谱估计成像方法。该方法将天线接收数据进行补偿达到阵列数据对齐后,首先利用双约束稳健Capon波束形成(DRCB)进行波束域预处理得到二维空间波束,然后利用Capon谱估计处理其二维空间谱获得高分辨成像。此方法将稳健波束形成和高分辨谱估计结合,明显改善了成像质量。实验数据处理结果验证了该方法的有效性。

High resolution spectral estimation imaging approach based on robust beamspace is proposea Ior uitra-wlaeoana through-the-wall radar. The received signal of all channel are firstly preprocessed to compensate for geometric attenutation, wall propagation attenutation and refraction effects so that the backscattered signals are alligned. Successively, two-dimensional spatial beams are achieved by beamspace preprocessing method based on doubly constrained robust Capon beamformer （DRCB）. Finally, The Capon spectrum estimation algorithm is applied to the two-dimensional spatial spectrum of spatial beams to obtain high resolution imaging. Combining DRCB and high resolution Capon spectral estimation significantly improves imaging quality. The effectiveness of the proposed methods is demonstrated by the experimentally measured data