多目标跟踪的分布式MIMO雷达有限阵元选取算法

Limited antenna selection algorithm in distributed MIMO radar system for multiple targets tracking

为充分发挥分布式多输入多输出雷达阵元选取的灵活性,提高多目标跟踪精度的同时,尽量降低系统的代价损耗,提出了一种基于多目标位置估计的阵元选取算法。首先,以提高目标位置估计精度为优化准则,在给定阵元子集大小和允许最高精度误差的约束下,建立了目标位置估计精度与系统代价损耗折中的阵元选取优化模型。然后,采用多起点搜索贪婪算法对模型进行求解,得到多目标跟踪的阵元选取结果。仿真结果表明,在一定阵元子集大小和跟踪目标个数的范围内,该算法能够获得良好的选取性能,并大大降低系统计算量。

In order to make full use of the flexibility of antenna selection for higher location accuracy and lower system cost of multiple targets tracking in distributed multiple input multiple output radar system,an antenna selection algorithm based on multiple targets location estimation is proposed.Firstly,an optimization criterion improving estimation accuracy of the targets location is derived,and a compromise model on estimation performance and system cost is established under the constraint of subset size and the highest accuracy error.Then,the corresponding antenna selection problem is solved by agreedy multi-start local search algorithm,and the antenna selection results of multiple target tracking are obtained.Simulation results demonstrate that the proposed algorithm can obtain a better performance in the range of subset size and targets quantity,and greatly reduce the computation complexity.