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Over the last few years high data rate wireless transmission has gained considerable attention in hot spot areas, including high buildings. It has been described that Distributed Antenna Systems (DASs) improve the performance of the indoor environment by covering dead spots. In this paper, a DAS architecture for high buildings is investigated, proposed and analyzed. The goal is to provide high data rate for indoor mobile users by exploiting spatial diversity and reducing the distance of radio transmission. In this system, the frequency is reused among floors. The radio signals in high buildings can propagate vertically and reach the neighbouring floors. Therefore, the performance of the system is limited by co-channel interference.
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