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Interference cancellation aided channel estimation for OFDM/OQAM system

查看全文 作　　者：CHENG [1,2]GuoBing;XIAO [1,3]Yue;HU [1,3]Su;LI [1]ShaoQian 高影响力作者 机构地区：[1]National Key Laboratory of Science and Technology on Communications, University of Electronic Scienceand Technology of China;[2]Telecommunication Engineering Institute of Air-force Engineering University;[3]National Mobile Communications Research Laboratory, Southeast University高影响力机构 出　　处：《Science China(Information Sciences)》索引2013年第56卷第12期,共8页高影响力期刊 基　　金：supported in part by Key Laboratory of Universal Wireless Communications, Beijing university of Posts and Telecommunications, Ministry of Education (Grant No. KFKT-2012102);Open Research Fund of National Mobile Communications Research Laboratory, Southeast University (Grant Nos. 2013D05, 2012D03);Fundamental Research Funds for the Central Universities (Grant No. ZYGX2010X003);National Natural Science Foundation of China (Grant No. 61101090) 摘　　要：Orthogonal frequency division multiplexing ofset-QAM(OFDM/OQAM)is a promising multicarrier transmission technique for its merits such as operating without cyclic prefx(CP)and flexibility of introducing well time-frequency localized pulse shapes.However,under dispersive channel condition,the intrinsic inter-symbol and inter-carrier interference arises in OFDM/OQAM system.Especially,the surrounding data symbols will cause interferences to the pilot symbols,leading to channel estimation error and degradation of system performance.In this paper,an efcient pilot structure and a channel estimation method are proposed for OFDM/OQAM system.The basic principal is to rebuild the transmitted symbols around the considered pilot position through pre-decision,then calculate and cancel the interference from the received signal.Analysis and simulation results show that the proposed scheme outperforms conventional ones with respect to both channel estimation accuracy and bit error rate(BER)performance while with less pilot consumption. 关 键 词：OQAM系统 信道估计 OFDM 干扰消除 多载波传输技术 导频符号 正交频分复用 载波间干扰
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