The Generalized DOA Matrix Method Based on Modified Data Matrix
一种基于修正数据矩阵的广义波达方向矩阵方法

A 2-D DOA estimation algorithm for coherent signal is presented based on plane array in this paper, firstly the plane array is divided into three sub-arrays with the nature of rotational invariance and three kinds of data matrix is formed for each of the three sub-arrays, based on which two kinds of modified data matrix is formed for raising the array utilization ratio. Then it imitates the DOA matrix method, obtains the generalized DOA matrix. Theoretical analysis shows that signal direction vectors and signal direction elements can be obtained via the eigen-decomposition of the generalized DOA matrix. Thus the coherent signal 2-D DOA can be estimated. This method avoids the parameter pairing and the spectrum peak searching, reduces the computation quantity. The computer simulation confirms the validity and the accuracy of this algorithm.