Joint frequency offset tracking and PAPR reduction algorithm in OFDM systems  被引量:4

Joint frequency offset tracking and PAPR reduction algorithm in OFDM systems

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作  者:Lijun Ge Yingxin Zhao Hong Wu Ning Xu Yu'ang Jin Wenqi 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》2010年第4期557-561,共5页系统工程与电子技术(英文版)

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.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:orthogonal frequency division multiplexing(OFDM) peak-to-average power ration(PAPR) carrier frequency offset complex conjugate multicarrier phase locked loop(MPLL) phase error. 

分 类 号:TN929.5[电子电信—通信与信息系统] TN953[电子电信—信息与通信工程]

 

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