【摘要】 在基于子空间方法的宽带信号测向算法中,聚焦矩阵的构造对测向性能有着重要的影响.本文给出了求聚焦矩阵的一类方法,聚焦前后阵列信噪比没有任何损失.通过对聚焦后的协方差矩阵进行特征值分解,然后进行一维谱峰搜索,获得宽带辐射源来波方向的估计值.把本文算法应用到均匀线阵上,仿真实验结果证明了算法的有效性,并且给出了方向估计精度、分辨率与信噪比、快拍数、相对带宽之间的关系.更多还原

【Abstract】 In the wide_band direction_finding algorithms based on the sub_space approach, the construction of focusing matrix has an important effect on the performance of direction_finding. This paper proposed a class of approaches of seeking focusing matrix and the array signal to noise ratio after and before focusing was without any loss. The covariance matrix after focusing was eigenvalue decomposed. Then spectrum peaks were searched and the estimate values of wideband radiator directions were obtained. The algorithm was applied to the uniform linear array and the simulation results demonstrate the algorithm has good performance. At the same time the relation between accuracy, resolution and signal to noise ratio, snapshots and relative bandwidth was got.更多还原