U-ESPRIT波达估计算法及其实现

Principle and Implementation of U-ESPRIT in Estimating Direction of Arrival

介绍了"酉-利用旋转不变技术估计信号参数(U-ESPRIT)"算法的模型,U-ESPRIT算法是基于子空间分解的谱估计算法。在"利用旋转不变技术估计信号参数(ESPRIT)"算法的基础上,通过引入观测数据的复共轭信息,经过数学变换,使阵列输出信号的协方差矩阵由复矩阵变成实对称矩阵,减小了计算量。最后介绍了U-ESPRIT算法的工程实现,并进行了实际测试,实验结果表明该方法估计精度高,实现简单。

The model of U-ESPRIT algorithm which is based on ESPRIT is analyzed.It has the advantages of high precision and less computation,and it can estimate several incoherent space signals and is suitable for high speed direction finding.The U-ESPRIT algorithm duplicates the acquired data by utilizing the complex conjugate part,furthermore it turns the covariance matrix of the array signal from a complex matrix into a real one,and the calculation is diminished.The engineering implementation is presented and the testing results show that the U-ESPRIT algorithm has a high precision in direction finding and is easy to implement.