Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2015, Vol. 38 ›› Issue (4): 70-75.doi: 10.13190/j.jbupt.2015.04.015

• Papers • Previous Articles     Next Articles

Proportional Fairness-guaranteed Energy-efficient Resource Allocation for MIMO-OFDM Systems

XU Gui-xian1, MA Wei-guo2, REN Yu-wei1   

  1. 1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2. State Key Laboratory of Wireless Mobile Communications, China Academy of Telecommunications Technology (CATT), Beijing 100191, China
  • Received:2014-11-24 Online:2015-08-28 Published:2015-08-28

Abstract:

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.

Key words: MIMO-OFDM system, resource allocation, energy efficiency, proportional fairness

CLC Number: