超材料孔径成像雷达的辐射场自由度评价

发布时间：2018-10-30 18:30

【摘要】：针对目前尚无超材料孔径成像雷达辐射场评价体系的问题,提出使用辐射场测量矩阵列互相关系数的一阶和二阶统计量两个指标实现辐射场自由度评价的方法,并详细分析了超材料孔径成像雷达的重建性能.首先,分析了仅使用测量矩阵互相关系数均值评价指标的问题;然后,引入互相关系数方差指标来完善评价体系;最后,结合压缩感知理论,通过相变图在两个评价指标和成像重建精度之间建立了对应关系.仿真结果表明,所提方法可有效地对辐射场自由度进行评价,对超材料孔径成像雷达的设计具有指导作用.
[Abstract]:In order to solve the problem that there is no radiation field evaluation system for metamaterial aperture imaging radar at present, a method is proposed to evaluate the degree of freedom of radiation field by using the first and second order statistics of the array of radiation field measurement matrix. The reconstruction performance of metamaterial aperture imaging radar is analyzed in detail. First of all, the problem of using the measurement matrix to evaluate the mean value of the cross-relation number is analyzed, and then, the index of variance of the cross-relation number is introduced to perfect the evaluation system. Finally, based on the theory of compression perception, the relationship between the two evaluation indexes and the reconstruction accuracy is established by phase change diagram. The simulation results show that the proposed method can effectively evaluate the degree of freedom of the radiation field and can be used as a guide for the design of a metamaterial aperture imaging radar.
【作者单位】：西安电子科技大学雷达信号处理国家重点实验室;西安电子科技大学信息感知协同创新中心;西安电子科技大学天线与微波技术重点实验室;
【基金】：国家杰出青年科学基金资助项目(61525105) 国家自然科学基金资助项目(61271291,61201285,61301280) 新世纪优秀人才支持计划资助项目(NCET-09-0630) 全国优秀博士学位论文作者专项资金资助项目(FANEDD-201156) 中央高校基本科研业务费专项资金资助项目
【分类号】：TN957.52

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