Uplink multipath suppression for multiuser OFDM systems using adaptive circular antenna arrays

As one of the basic technologies for the development of wireless telecommunication systems, which has considerable potential, OFDM is applied in many fields, and further extending of their application is expected. This paper analyzes the proposed methodology for mutipath suppression in mobile multi-user OFDM systems using circular adaptive antenna arrays. The comparison of performances of systems with an antenna system with single antenna and with circular antenna array is showed. The scenario in which appear non-stationary conditions was analyzed. The characteristics of radio channels are changing in time because of the mobility of users, and therefore, the adaptive LMS and RLS algorithms are also used. The proposed methodology is based on mathematical modeling and simulations using MATLAB software package.