%0 Journal Article
%A LONG Hang
%A WANG Wen-bo
%A ZHAO Hui
%A ZHAO Long
%A ZHENG Kan
%T Optimal Energy Efficient Power Allocation for Downlink MIMO System
%D 2013
%R 10.13190/jbupt.201304.36.zhaol
%J Journal of Beijing University of Posts and Telecommunications
%P 39-43
%V 36
%N 4
%X <p>In order to decrease the carbon emission and operator expenditure induced by energy consumption of wireless communication networks, a power allocation scheme achieving optimal energy efficiency is proposed for downlink multiple-input multiple-output system. An energy efficient model is formulated based on realistic power consumption model and beam forming. The existence of unique globally optimal energy efficiency is proved, and the closed-from of the optimal energy efficiency is derived depending on channel state information. Based on the closed-form result, an iterative algorithm achieving optimal energy efficiency adaptively is developed. Simulation shows that the proposed scheme can improve the energy efficiency and spectrum efficiency. Meanwhile, increasing the number of antennas and shrinking cell radius are two important measures to enhance the energy efficiency and the spectrum efficiency.</p>
%U https://journal.bupt.edu.cn/EN/10.13190/jbupt.201304.36.zhaol