Large-Scale MIMO Systems with Practical Power Constraints

descriptionPublicationkeyboard_double_arrow_right Article , Conference object 01 Sep 2016Publisher:IEEEJournal:2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)

Authors: Rami Hamdi; Elmahdi Driouch; Wessam Ajib;

doi: 10.1109/vtcfall.2016.7881066

Large-Scale MIMO Systems with Practical Power Constraints

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Abstract

In this paper, we investigate the downlink of large-scale MIMO systems considering two practical constraints related to system power. More precisely, we consider a non-negligible circuit power consumption and we impose a per-antenna power constraint due to limitations on the linearity of the RF power amplifier. Hence, a sum-rate maximization problem considering the two constraints is formulated for conjugate beamforming and zero forcing beamforming. Next, we propose efficient greedy antenna selection and power allocation algorithms in order to heuristically solve the formulated problem with reasonable computational complexity. Simulation results show the efficiency of the proposed algorithms compared to random antenna selection and optimal brute force antenna selection.

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