Estimation of both the frequency and 2-D arrival angles of coherent signals

A new time-space smoothing DOA algorithm(TSS-DOA) is proposed for joint estimation of both the frequency and 2-D arrival angles of coherent signals over a wide frequency band.Firstly the time-space smoothing matrix is constructed by the temporal and spatial data of two parallel uniform linear arrays and the smoothing technique,and then 3-D parameters of coherent signals can be obtained from its eigenvalues and the corresponding eigenvectors.The algorithm can precisely estimate the 3-D parameters of coherent signals and doesn't need the multidimensional spectrum peak search,and it still has the advantage of smaller computational load and pairs the parameters automatically.In addition,it can still estimate the 3-D parameters of signals correctly when signals have the same one or two dimensional parameters.Simulation results show that the proposed algorithm is effective.