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In this paper, we present the beamforming technologies used for increasing the system capacity at unlicensed band. We investigate the international research trend and the key technology of some companies, such as Wavion, GoNet, and Ruckus Inc. We also introduce the Binary CDMA technologies good at PAPR characteristics. Finally, we analysis the performance of receive beamforming using Compact MIMO...
Secure communications in a multiple input multiple output (MIMO) system in which the eavesdropper's channel is inherently superior to that of the legitimate receiver is described. Both the legitimate receiver and the eavesdropper are assumed to have equal knowledge and comparable computational capabilities and there is no "secret key" known only to the legitimate receiver. The combination...
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