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Multiple-Input Multiple-Output (MIMO) wireless communication technology has been expected to improve the channel capacity with a limited bandwidth for the future networks. Since the propagation environment or the propagation channel becomes very complex, it is difficult to simply estimate the channel capacity in urban MIMO systems. Hence, we introduce the characteristics of channel capacity in urban...
Space division multiple access (SDMA) has been expected for improving frequency utilization efficiency in mobile communication systems. In such a system, communication quality is deteriorated when user terminals close to each other because the signals from each user terminal can not be separated by directional pattern in that situation. This paper describes the effects of path visibility on space...
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