基于RMA的三维成像与二维MIMO阵设计  

3-D Imaging and 2-D MIMO Arrays Design Based on Range Migration Algorithm

作　　者：王武[1] 陆必应[1] 孙鑫[1] 周智敏[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《现代雷达》2016年第2期38-42,65,共6页Modern Radar

摘　　要：距离迁移(RM)算法能够精确校正近场距离徙动,同时通过使用快速傅里叶变换可以达到很高的计算效率,具有应用于近场MIMO雷达三维实时成像的潜力。RM算法应用于近场MIMO成像的主要挑战是设计合适的阵列结构。文中利用球面波分解为无穷多个平面波的方法推导了MIMO雷达近场三维RM成像算法,在深入分析算法实现流程的基础上得到了RM算法对MIMO阵列构型的四条约束条件。提出了一种适用RM算法的MIMO阵列设计方法,并利用所提方法设计了MIMO阵列,结合仿真,分析了所设计阵列的成像性能。Because of compensating completely the curvature of wave-front in near field and high computational efficiency by using fast Frourier transform, range migration algorithm （ RMA） has the potential for MIMO radar 3-D real-time imaging.The main chal-lenge of using RMA in near field MIMO imaging is to design appropriate MIMO array topology.In this paper, the formulation of MIMO 3-D imaging using RMA is derived by using the theory that a spherical wave can be decomposed into infinite superposition of plane waves.Analyzing the RMA implementation processes, we obtain four constraints about MIMO topology.The designing meth-od of MIMO arrays for RMA is proposed in this paper, and MIMO arrays are designed.Performance of these arrays and accurate imaging reconstruction of RMA are analyzed with numerical simulations.

关 键 词：MIMO雷达 三维成像 距离迁移 阵列设计 

分 类 号：TN957.52[电子电信—信号与信息处理]