Studies on DOA estimation in the presence of multipath in a frequency hopping system

Abstract

This thesis mainly focuses on the DOA estimation problem applied to a Frequency Hopping (FH) system. As the main portion, we present a new method for DOA estimation in the presence of Mutual Coupling (MC) and multipath propagation for a FH System. We first put forward a signal model that takes MC and multipath propagation into account. Then, we derive an ML estimator for both MC and DOA estimation and introduce the associated Alternating Minimization algorithm. Finally, we present some simulation results to illustrate the performance of the technique and give some concluding remarks.In addition, we also briefly introduce a new method for joint time-delay and DOA estimation with a reduced number of receivers in the presence of multipath propagation for a FH system. And the corresponding simulation results illustrate the effectiveness of this method.