Abstract:
Many communication networks, including MIMO ones, use base station transmit antenna selection (TAS). TAS in small user equipment (UEs) with switchable directional antennas is becoming popular due to the small size of millimeter-wave (mmWave) microstrip antenna elements.
This paper considers device-to-device (D2D) communications under a cellular network where each D2D UE has switchable transmit antennas. Generalized Bender’s Decomposition (GBD) algorithm solved the problem of globally optimal transmit antenna selection, channel allocation, and transmit powers of cellular and D2D UEs.
As shown in the simulation results, we reformulated the non-convex primal subproblem of the proposed GBD-based method into convex form and obtained the closed-form solution through analytical manipulations. This increased the execution speed by at least 60 times.
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