分布式雷达稀疏成像的重构特性与布站优化  

Reconstruction characteristic and station layout optimization of distributed radar sparse imaging

作　　者：王硕[1] 陈卫东[1] 

机构地区：[1]中国科学院电磁空间信息重点实验室中国科学技术大学,安徽合肥230027

出　　处：《中国科学技术大学学报》2014年第4期303-309,共7页JUSTC

基　　金：国家自然科学基金(61172155)资助

摘　　要：从分布式雷达稀疏成像角度分析了目标稀疏重构性能与分布式雷达收发布站之间的关系.在建立分布式雷达稀疏成像模型的基础上,推导了重构矩阵互相关系数与分布式雷达系统参数的关系式,并指出在给定系统参数和成像场景划分方式下,互相关系数仅与各收发站的单位指向矢量有关.据此,以最小化互相关系数为目标函数,对雷达布站进行了优化布局,并通过仿真试验对重构性能的改善进行了验证.The relationship between target reconstruction and station layout in distributed radar sparse imaging system was studied.Based on the sparse imaging model of the distributed radar,the relationship between mutual coherence of measurement matrix and system parameters was derived.Furthermore,it was presented that the mutual coherence was decided only by unit station direction vector under the given conditions of radar parameters and imaging scene partition.Therefore,the cost function ＂minimization of mutual coherence＂ was utilized for station layout optimization.Simulation results are provided to demonstrate the performance improvement of the proposed method.

关 键 词：分布式雷达 稀疏成像 互相关系数 布站优化 

分 类 号：TN958.97[电子电信—信号与信息处理]