Abstract:A new DOA estimation method based on orthogonal joint diagonalization of high-order cumulant is proposed. The high-order cumulant matrices are jointly utilized to DOA. Through processing high-order cumulant matrices by the new technique of orthogonal joint diagonalization, the spatial spectrum can be defined by both joint diagonalization matrix and a set of diagonal matrices. This method is also proved to process the coherent sources, and can be used in the colored noise environment. Compared to cumulant-based method using single high-order cumulant matrix, the proposed method has the higher resolution, lower RMSE and stronger robust.