基于非均匀采样的信号频率和到达角联合估计

利用阵列中每个阵元有不同采样频率的非均匀采样特性,可以等效得到时变的虚拟非均匀线阵,然后采用经典的子空间法中的MUSIC测向法,通过网格搜索实现对信号频率和DOA联合估计;并且通过合理设置各阵元间的采样率,有效提高空间谱估计的分辨率和精度,还可避免测向角度模糊。该算法采用网格搜索法,明显减少了计算量。计算机仿真结果证明该方法的有效性和正确性。

Joint Estimation of Frequency and DOA of Signals Based on Nonuniform Sampling

Considering the character of nonuniform sampling(NUS) with each array,NUS in each array is equivalent to a time-varying virtual nonuniform linear array.This algorithm utilities classical subspace method,such as MUSIC(multiple signal classification),achieves the joint estimation of frequency and DOA of signals by mesh search.According to set reasonable sampled frequency for each array,the method can enhance the angle resolution and estimation accuracy effectively,and avoid the angle-measure ambiguity.Further...