【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。更多还原

【Abstract】 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.更多还原