DOA Estimation of Weak Signal Based on Orthogonal Projection Transform
Zeng An-jun · Modern Radar · 2011
A modified DOA estimation algorithm for weak signal in the presence of strong jamming/signal is proposed.The algorithm is based on orthogonal projection transform of the strong signal array.Through the construction of orthogonal projection matrix of strong signal array and the pre-processing of received array data vector,the influences of the strong signal to DOA estimation is suppressed.The proposed algorithm has low complexity and small computation compared with MUSIC and JJM algorithms and can effectively estimate DOAs of multiple weak signals in condition of multiple strong signals present.