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An Energy Efficient Transmission Scheme for OFDM Systems in LTE

An Energy Efficient Transmission Scheme for OFDM Systems in LTE
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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.
作者 SHENG Bin
出处 《China Communications》 SCIE CSCD 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
关键词 OFDM cyclic prefix LTE energy efficiency OFDM系统 LTE 传输方案 能源 正交频分复用 有效能量 能量损耗 发射功率
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