Achievable Rate optimization for WET Enabled mmWave D2D Communication Systems

This paper focuses on the achievable rate optimization of relay-assisted millimeter wave (mmWave) Device-to-Device (D2D) communication systems. In the system, full-duplex relays with multiple antennas are deployed to improve the performance of data transmission between D2D users. In addition, the source node can wirelessly harvest the energy from relays for D2D data transmission through wireless energy transfer (WET). With respect to the proposed system, the closed-form expressions of both the achievable rate and harvested energy are derived. Based on those expressions, the impact of pilot sequences on WET and information transmission are analyzed. A novel scheme is proposed to determine the optimal pilot sequence that can maximize the system achievable rate. Simulation results confirm the accuracy and optimality of the proposed scheme.

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