An Energy Efficient Transmission Scheme for OFDM Systems in LTE  

作　　者：SHENG Bin 

机构地区：[1]National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, E R. China

出　　处：《China Communications》2014年第3期13-18,共6页中国通信（英文版）

基　　金：the Chinese 863 Program，National "Eleventh Five-year" Project of China，the National Natural Science Foundation of China

摘　　要：In orthogonal frequency division multiplexing(OFDM) systems,for given total transmit power,insertion of the noninformation bearing cyclic prefix(CP) will reduce the effective energy per information bit.Generally,the energy loss is proportional to the ratio of CP length to the symbol duration.If the CP is too long,the energy loss will be considerable high.In this paper,we propose an energy efficient transmission scheme for OFDM systems in Long Term Evolution(LTE) which is developed based on reduction of the CP energy.Simulation results show that the proposed method can save up to about10%of the total energy,while keeping almost the same bit-error-rate(BER) performance in some applications.In orthogonal frequency division multiplexing （OFDM） systems, for given total transmit power, insertion of the non- information bearing cyclic prefix （CP） will reduce the effective energy per information bit. Generally, the energy loss is proportional to the ratio of CP length to the symbol duration. If the CP is too long, the energy loss will be considerable high. In this paper, we propose an energy efficient transmission scheme for OFDM systems in Long Term Evolution （LTE） which is developed based on reduction of the CP energy. Simulation results show that the proposed method can save up to about 10% of the total energy, while keeping almost the same bit-error-rate （BER） performance in some applications.

关 键 词：OFDM cyclic prefix LTE energy efficiency 

分 类 号：TN929.5[电子电信—通信与信息系统] O462.5[电子电信—信息与通信工程]