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Trust Degree-Based MISO Cooperative Communications with Two Relay Nodes
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NSTL
Wiley-Hindawi
In this paper, we propose transmission strategies in multiple-input-single-output (MISO) cooperative communications with two relay nodes in cases when the relay nodes have different trust degrees, where the trust degrees represent how much the relay nodes can be trusted for cooperation. For the given trust degrees and channel conditions, we first derive a relay selection strategy that maximizes the expected achievable rate. We then propose a cooperative transmission strategy of relays with an optimal cooperative beamforming vector that maximizes the expected achievable rate, which is a linear combination of weighted channel vectors. Finally, we derive the optimal transmission strategy, which is a mixed strategy between the relay selection and cooperative transmission strategies with respect to the trust degrees. Our analysis and numerical results show that the proposed transmission strategies increase the expected achievable rate by exploiting the trust degrees of the relay nodes, along with the channel conditions.
Jong Yeol Ryu、Jung Hoon Lee
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Department of Information and Communications Engineering and Institute of Marine Industry, Gyeongsang National University
Department of Electronics Engineering and Applied Communications Research Center, Hankuk University of Foreign Studies
NSTL
Wiley-Hindawi
