Noncircularity Exploitation In Direction Of Arrival Estimation

In this thesis, we develop advanced techniques and concept for direction of arrival(DOA) estimation and polarization. These techniques have been developed in order to es-timate both direction of arrival and polarization of non-circular signal sources. First, wepropose a DOA estimation method using the fourth-order cumulant (FOC-DCI), which canbe viewed as a cumulant domain DCI (Diagonally loaded Conjugate correlation matrix In-verse power method). This method does not require any eigendecomposition of the cumu-lant matrix of the received data and does not require source enumeration. It also eliminatesthe need for knowledge of the spatial characteristics of the noise and interferences. Com-puter simulation results are provided to demonstrate the performance of the proposed ap-proach and compare them to the standard DCI. The Second part another method for DOAestimation of polarized electromagnetic sources impinging on a six-component vec-tor-sensor array. The proposed method that estimates the parameters based on the se-cond-order generalized DCI method. By computing the mean square error for differentscenarios, the performance of this method is compared to Polarimetric-MUSIC. It shownthat our method outperforms Polarimetric-MUSIC.