中文摘要：

为了提高超宽带穿墙雷达目标成像的分辨率和对比度,提出混合双约束稳健Capon波束形成（DRCB）和相干因子（CF）的自适应成像方法。该方法根据穿墙电磁传播特性首先补偿墙体损耗和传播时延达到天线阵列数据配准的目的,然后利用DRCB提高成像的分辨率和干扰抑制能力,利用改进的CF加权自适应抑制旁瓣提高成像对比度。实验数据处理结果验证了该方法的有效性,与传统成像方法相比可以获得更好的成像结果。

英文摘要：

An effective adaptive imaging method that combines doubly constrained robust Capon beamformer（DRCB） and coherence factor（CF） weighting is proposed for ultra wideband（UWB） through-wall radar imaging.The received signals from all channels are aligned by compensating for geometric attenuation,wall propagation attenuation and refraction effects.Then DRCB imaging method is applied to achieve high resolution and much better interference suppression capability.In addition,improved adaptive CF weighting is applied to suppress sidelobes and greatly improve the contrast.Therefore,combining DRCB and CF weighting can simultaneously improve imaging resolution and contrast.Experiment data processing results demonstrate that compared with conventional imaging algorithms,the proposed method can obtain excellent performance.