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In this paper we consider an antenna system, that consists of one active and one parasitic antenna element. Different antenna patterns may be created by loading the parasitic element with appropriate reactive impedances on each symbol period. We demonstrate the performance of a communication link that uses the proposed antenna system at the transmitter and two omnidirectional antennas at the receiver. The Arimoto-Blahut algorithm is used to find the capacity achieving distribution on the channel symbols. The capacity of the antenna system is compared to the capacity obtained by a single transmitter antenna.
Date of Publication: October 2008