%0 Journal Article
%A MA Wei-guo
%A REN Yu-wei
%A XU Gui-xian
%T Proportional Fairness-guaranteed Energy-efficient Resource Allocation for MIMO-OFDM Systems
%D 2015
%R 10.13190/j.jbupt.2015.04.015
%J Journal of Beijing University of Posts and Telecommunications
%P 70-75
%V 38
%N 4
%X <p>An energy efficient resource allocation algorithm for downlink multiple-input-multiple-output orthogonal frequency division multiple (MIMO-OFDM) system was proposed to implement the energy efficiency (EE) maximization, satisfying total power constraint as well as the proportional rate constraints. In order to reduce the computational complexity, a two-step subcarrier assignment and power allocation scheme was proposed to derive the suboptimal solution of the optimization problem. The estimated energy-efficient transmit power is obtained under assumption of flat fading and subcarrier sharing. The equal-power allocation-based method was adopted to carry out subcarrier assignment. Furthermore, the optimal energy-efficient power allocation was derived according to the result of the first-step subcarrier assignment. Simulations show that the proposed algorithm brings remarkable gains on energy efficiency and guarantees proportional fairness of the users.</p>
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2015.04.015