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 challenge 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 method 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.

TN957.51