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

In this paper, we derive ergodic EE based on the optimal transmit power and joint optimization antenna selection (AS) with impact pilot reuse sequences (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.
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Antenna selection and transmission power for energy efficiency in downlink massive MIMO systems