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In this paper, we consider the three-hop MIMO relaying systems, based on the amplify-and-forward (AF) protocol, where there are two relay nodes both of which are equipped with multiple antennas, over Gaussian broadcast channels. We also consider that the base station (BS) broadcasts the signals to multiple distributed users via two relay nodes, that is, three hops, using a zero-forcing dirty paper...
Over the past few years, a considerable number of studies have been made on the Return on Security Investment (ROSI) in connection with security policy. However, it is necessary to quantity types of projected damages, cyber threats, security safeguards and ROSI, since the size of information system and its investment factors are growing continuously. Accordingly, in this paper, we propose a way of...
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