A kind of method for direction of arrival estimation based on blind source separation demixing matrix

Direction of arrival(DOA) estimation is the base of the underwater target orientation, tracking. Based on the characteristic of the array manifold can be estimated by complex blind source separation using the singular value decomposition, a new kind of model and method for DOA estimation is proposed using the directivity patterns of the blind source separation demixing matrix. Its efficiency and stability was tested by simulation data and recorded data in real sea. Results show that it can complete the real-time estimation of the target direction. And it is superior to the minimum variance distortionless response(MVDR) method and the method proposed in relevant literatures, it can obviously improves the detection capability of the sonar system for the faint target signal obviously.