Detection of correlated signal using circular antenna arrays

Adaptive arrays are used in smart antenna systems in order to locate and track the signals from different users. They are used to overcome multipath propagation phenomena such as reflection, diffraction and scattering. One of the major effects of the multipath propagation is the correlation between the received signals. This paper presents the Direction-of-Arrival (DOA) estimation algorithm with emphasis on MUltiple SIgnal Classification (MUSIC) algorithm and MUSIC with spatial smoothing techniques to de-correlate the input signals. In addition, it presents the design and implementation of some algorithms for de-correlating the input signal using circular adaptive antenna arrays. These algorithms were implemented in MATLAB where the different parameters of the antenna array and steering algorithms can be changed using a graphical user interface (GUI).