A DOA Estimation and Mutual Coupling Self-calibration Algorithm for Uniform Linear Array in the Presence of Multipath

To solve mutual coupling of uniform linear array(ULA) in the presence of multipath channel,a joint Direction of Arrival(DOA)estimation and mutual coupling calibration algorithm is proposed.Firstly,coherent source covariance matrix is restored to full rank via the preprocessing method of virtual array moving without changing the mutual coupling.Then a cost function is constructed based on subspace theory and is minimized by rank loss method to estimate the DOA of the signals and mutual coupling error using the Toeplitz structure of the covariance matrix for ULA.Simulation results show that the algorithm has effective performance for DOA estimation and mutual coupling self-calibration.