Energy-Efficient Configuration of Power Resource for OFDM-Based Opportunistic Regenerative Relay Links  

作　　者：FENG Li KUANG Yujun WU Binwei 

机构地区：[1]School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China [2]Sichuan Open University, Chengdu 610073, China

出　　处：《Chinese Journal of Electronics》2016年第2期341-347,共7页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61201129,No.61071099);the Fundamental Research Funds for the Central Universities(No.2012QNA5046);the Research Fund of Huawei Corporation

摘　　要：In this paper, adaptive Power allocation(PA) on the source and relay is investigated to maximize Energy efficiency(EE) for OFDM-based Opportunistic regenerative relay links(O2RL). We derive EE function from O2 RL model by appropriate definition of variables to represent source/relay PA, Subcarrier transmission mode selection(STMS), and circuit power consumptions elegantly.Theoretical analysis demonstrates that EE function for O2 RL is strictly quasi-concave with respect to the overall transmit power. Exploiting the quasi-concavity property of the EE function, an EE-oriented optimal PA iterative method for O2 RL is proposed which used the bisection method to speed up the search of the optimum. Simulation results demonstrate that the O2 RL is more energyefficient than Traditional cooperative relaying strategies(TCRS), and the proposed method as compared to the Sum throughput maximization PA(STMPA) method is able to significantly improve performance in terms of system EE.In this paper, adaptive Power allocation（PA） on the source and relay is investigated to maximize Energy efficiency（EE） for OFDM-based Opportunistic regenerative relay links（O2RL）. We derive EE function from O2 RL model by appropriate definition of variables to represent source/relay PA, Subcarrier transmission mode selection（STMS）, and circuit power consumptions elegantly.Theoretical analysis demonstrates that EE function for O2 RL is strictly quasi-concave with respect to the overall transmit power. Exploiting the quasi-concavity property of the EE function, an EE-oriented optimal PA iterative method for O2 RL is proposed which used the bisection method to speed up the search of the optimum. Simulation results demonstrate that the O2 RL is more energyefficient than Traditional cooperative relaying strategies（TCRS）, and the proposed method as compared to the Sum throughput maximization PA（STMPA） method is able to significantly improve performance in terms of system EE.

关 键 词：Energy efficiency Orthogonal frequency division multiplexing（OFDM） Power allocation Regenerative relay 

分 类 号：TN929.53[电子电信—通信与信息系统]