Two-Dimensional Weak Signal DOA Estimation Based on Corrected Projection Jam Method in the Presence of Strong Interference

For weak signals direction-of-arrival （DOA）estimation of two-dimensional in the presence of strong interference，a new algorithm based on the corrected projection jam method is presented. This paper constructs the orthogonal projection matrix of jamming subspace as block matrix and then pre-processes the received array signal vector，so as to constrain the strong interferences. In this paper, the corrected projection jam method is theoretically analyzed. simulation and performance comparison are carried out for the common two-dimensional array （such as plane array, cross array and Y array）. The simulation results show that this method can effectively estimate DOA of weak signals in condition of multiple strong signals present, which is unaffected by the given angle information of strong interference without losing degrees of freedom.