摘要
针对传统的线性预测算法应用到双基地MIMO雷达目标定位中分辨率低的问题,提出了一种改进方法。J正交矩阵退化之后是正交矩阵,前者包含了更多的信息和性质。首先建立了双基地MIMO雷达信号模型,然后讨论了J正交矩阵特点和构造方法,并用之构造发射信号。用线性预测算法对双基地MIMO雷达扫描区域的功率峰值进行判断,估计出目标波离方向和波达方向,从而定位双基地MIMO雷达目标。仿真结果表明,利用J正交矩阵构造发射信号,可以降低双基地MIMO雷达目标角度估计的克拉美劳界,提高线性预测算法对双基地MIMO雷达目标的定位能力,实现目标的超分辨率估计。
A new method is applied to enhance the precise of linear prediction algorithm on DOD and DOA estimation in bistatic MIMO radar.When a J-orthogonal matrix degenerates,it becomes an orthogonal matrix.A J-orthogonal matrix contains more information and properties than the corresponding orthogonal matrix.Firstly,a signal model of bistatic MIMO radar is established and properties of J-orthogonal matrix are discussed.Secondly,linear prediction algorithm is used to estimate the power peaks in scanning space of bistatic MIMO radar.As a result,direction of departure(DOD)and direction of arrival(DOA)of multiple targets are estimated.The simulation results verify that the J-orthogonal matrix has a significant effect on the Cramer-Rao bound(CRB)of angular estimation in bistatic MIMO radar,can improve the localization ability of the linear prediction algorithm in bistatic MIMO radar,and helps to realize high resolution.
作者
赵霞
郭陈江
瞿颜
ZHAO Xia;GU0 Chen-jiang;QU Yan(School of Electronics and Information,Northwestern Polytechnical University,Xi'an Shanxi 710129,China;School of Electrical and Information Engineering,North Minzu University,Yinchuan Gansu 750021,China;Department of Antennas,Institute of Space Radio Technology(CAST Xi'an),Xi'an Shanxi 710100,China)
出处
《计算机仿真》
北大核心
2019年第3期1-5,共5页
Computer Simulation
基金
总装预研重点基金(9140A01010412HK03004)
航天创新基金(HTCXJJKT-22)
