Antenna selection and transmission power for energy efficiency in downlink massive MIMO systems

Authors : Adeeb SALH, Lukman AUDAH, Nor İda Mohd SHAH, Shipun Anuar HAMZAH, Hasan Saeed MIR

Pages : 697-709

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Massive multiinput-multioutput insert ignore into journalissuearticles values(M-MIMO); systems are crucial for maximizing energy efficiency insert ignore into journalissuearticles values(EE); in fifth-generation insert ignore into journalissuearticles values(5G); wireless networks. A M-MIMO system`s achievable high data rate is highly related to the number of antennas, but increasing the number of antennas the system raises energy consumption. In this paper, we derive ergodic EE based on the optimal transmit power and joint optimization antenna selection insert ignore into journalissuearticles values(AS); with impact pilot reuse sequences insert ignore into journalissuearticles values(PRSs);. We apply Newton`s method and the Lagrange multiplier to derive jointly optimized AS and optimal transmission power under the effect of PRSs. The proposed algorithm prevents repeated searching for joint optimal AS and optimal transmission power to reduce the complexity caused by an increasing number of antennas. From the simulation results, we conclude that EE could be maximized by employing the minimal PRSs and transmission power that are greater than the circuit`s power consumption. The proposed algorithm offers maximum EE by repeating a minimizing pilot signal until the optimal AS and transmission power are achieved.
Keywords : Massive multiinput multioutput, energy efficiency, fifth generation, quality of service