Joint frequency offset tracking and PAPR reduction algorithm in OFDM systems

查看全文 作　　者：Lijun Ge Yingxin Zhao Hong Wu Ning Xu Yu'ang Jin Wenqi [1]Li

机构地区：[1]College of Information Technical Science, Nankai University, Tianjin 300071, E R. China

出　　处：《Journal of Systems Engineering and Electronics》索引2010年第21卷第4期,共5页

基　　金：supported by the National Natural Science Foundation of China(60872026);the Natural Science Foundation of Tianjin(09JCZDJC16900) 摘　　要：This paper presents an algorithm that aims to reduce the peak-to-average power ratio(PAPR) of orthogonal frequency division multiplexing(OFDM) communication systems while maintaining frequency tracking.The algorithm achieves PAPR reduction by applying the complex conjugates of the data symbol obtained from the frequency domain to cancel the phase of the data symbol.A likelihood estimator is used to obtain the sub-carrier phase error due to the residual carrier frequency offset(RCFO) using the same complex conjugates as a pilot signal.Furthermore,a joint time and frequency domain multicarrier phase locked loop(MPLL) is developed to compensate additional frequency offset.Simulation results show that this algorithm is capable of reducing PAPR without impacting the frequency tracking performance. 关键词：OFDM系统跟踪算法 PAPR 载波频率偏移频偏正交频分复用频率跟踪峰均功率比

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Joint frequency offset tracking and PAPR reduction algorithm in OFDM systems

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