چكيده به لاتين
In this thesis, we address problem of coherent sources direction finding based on the fourth-order cumulants of data and toeplitz approximation. First, by using the fourth-order cumulants of data Gaussian noise of sensors (whether white or colored) is removed. Then, we construct a matrix using the Topelitz approximation which is Full rank independent of the coherence of the sources. Finally by using the current methods in array signal processing such as the MUSIC and ESPRIT, we estimate the direction of sources impinging on the array. Results of the proposed method suggest that this method is superior to ESPRIT-like method based on fourth-order cumulants in spatially correlated Gaussian noise scenario. We have also extended the proposed method by considering all possible states. Generalization of the proposed method, due to the consideration of more statetes would result in better performance which is also confirmed by simulation results and comparison of the proposed method error with its generalization.
Keywords: Coherent source direction finding, fourth-order cumulants of data, Toeplitz approximation, Spatially correlated noise
