| Joint Synchronization and Channel Estimation for OFDM Systems |
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| 引用本文： | CAO Xue-hong Department of Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,P.R. China. Joint Synchronization and Channel Estimation for OFDM Systems[J]. 中国邮电高校学报(英文版), 2005, 12(2) |
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| 作者姓名： | CAO Xue-hong Department of Information Engineering Nanjing University of Posts and Telecommunications Nanjing 210003 P.R. China |
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| 作者单位： | CAO Xue-hong Department of Information Engineering，Nanjing University of Posts and Telecommunications，Nanjing 210003，P.R. China |
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| 基金项目： | This workis supported by Natural Science Research Foundation of the Education Department of Jiangsu Provnice(01KJB510003) . |
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| 摘 要： | 1Introduction Orthogonal Frequency Division Multiplexing(OFDM) has become a popular technique for transmis-sion of signals over wireless channels . OFDMhas beenadoptedinseveral wireless standards such as Digital Au-dio Broadcasting ( DAB) , Digital Video Broadcasting(DVB-T) ,the IEEE 802 .11a[1]Local Area Network(LAN) standard and high performance LAN type 2(HIPERLAN/2)[2]standard. OFDMis also being pur-sued for Dedicated Short-Range Communications(DSRC) for road side to …
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Joint Synchronization and Channel Estimation for OFDM Systems |
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| CAO Xue-hong. Joint Synchronization and Channel Estimation for OFDM Systems[J]. The Journal of China Universities of Posts and Telecommunications, 2005, 12(2) |
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| Authors: | CAO Xue-hong |
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| Abstract: | OFDM systems are extremely sensitive to synchronization and channel estimation imperfections. Meanwhile the timing, frequency synchronization and channel estimation may affect each other. This paper investigates a new algorithm of joint estimation utilizing one training signal which can be used in preamble-based OFDM system, such as IEEE 802.11a WLAN system. The scheme includes two stages for performance improvement and simplicity. At the first stage, the coarse timing and frequency offset and channel response are obtained. The fine synchronization and channel estimation based on the coarse stage are obtained at the second stage. The simulation results show that the channel estimation of the proposed joint estimation is quite close to the case with known sync parameters and the BER of the system is quite close to the case with known channel response. |
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| Keywords: | OFDM WLAN synchronization channel estimation maximum likelihood |
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