阵列信号波达方向-频率的同时估计方法

Direction of Arrival and Frequency Estimation in Array Signal Processing

入射信号的参数估计是阵列信号处理中的基本问题．基于阵列信号处理中高分辨率波达方向－频率的同时估计问题，提出了针对等距线阵的方法．利用时延数据，以时间变元作为旋转因子，在此基础上实现ＥＳＰＲＩＴ技术，对波达方向和频率同时进行估计．方向和频率之间的配对问题可以对应关系自动解决．这样不但可以完全避免多项式搜索，运算量少，而且分辨率也相当高．给出的计算机模拟实验证实了该方法的有效性．

A new high resolution signal estimation algorithm was presented, which can estimate the spatial azimuths θ i and the temporal frequencies f i of the sources by using ESPRIT technique. By using a single temporal invariance algorithm, the parameter pair ( θ i, f i) of each source can be easily obtained and automatically combined with the eigenvectors and eigenvalues. The proposed approach is simple and direct, and does not require a search procedure. The simulation results were also presented to demonstrate the performance of the proposed approach.