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In this paper, we address the problem of green and secure communications under adverse conditions, i.e., no instantaneous eavesdropper channel state information (CSI) and imperfect instantaneous legitimate CSI. The benefits of a massive multiple-input multiple-output relay are exploited to significantly improve the secrecy energy efficiency (bit per Joule), which is defined as the ratio of secrecy...
In this paper, we aim to improve the physical layer security for Device-to-device (D2D) communication underlaying cellular networks by allocating interference power elegantly, and the security issues of both cellular users and D2D pairs are taken into consideration simultaneously. First of all, the two-level sequential Stackelberg game is introduced to solve the above problem via power allocation,...
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