Abstract: Computationally simple projection methods are proposed to avoid a lot of computa-tions of eigenvalue decomposition (EVD)in array proeessing.However,the complex computa-tions are still needed in projection methods.To reduee computations further,a projection method in real region is presented.The computations of the proposed method are redueed greatly,be-cause the real computations are used in the proposed method instead of the corresponding com-plex computations Also the perfonnance of the complex projection method is kept.Computer simulation and practical experiment results show the effectiveness of the proposed method.

Key words: array processing, spatial spectrum estimation, radar signal processing