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Paper detail

Reconfigurable Intelligent Surfaces for Energy Efficiency in D2D Communication Network

In this letter, the joint power control of D2D users and the passive beamforming of reconfigurable intelligent surfaces (RIS) for a RIS-aided device-to-device (D2D) communication network is investigated to maximize energy efficiency. This non-convex optimization problem is divided into two subproblems, which are passive beamforming and power control. The two subproblems are optimized alternately. We first decouple the passive beamforming at RIS based on the Lagrangian dual transform. This problem is solved by using fractional programming. Then we optimize the power control by using the Dinkelbach method. By iteratively solving the two subproblems, we obtain a suboptimal solution for the joint optimization problem. Numerical results have verified the effectiveness of the proposed algorithm, which can significantly improve the energy efficiency of the D2D network.

preprint2020arXivOpen access
Shuaiqi JiaXiaojun YuanYing-Chang Liang
math.ITInformation Theoryeess.SP
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Shuaiqi JiaXiaojun YuanYing-Chang Liang

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