| A Reduced Complexity Time-Delay Tracking and Channel Estimation for OFDM Systems |
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| 作者姓名： | 侯晓贇 罗汉文 郑宝玉 徐友云 宋文涛 |
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| 作者单位： | [1]Dept. of Electronic Eng. , Shanghai Jiaotong Univ. , Shanghai 200030, China [2]Dept. of Information Eng. , Nanjing Univ. of Posts ＆ Telecommunications, Nanjing 210003 |
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| 基金项目： | National Natural Science Foundation of China(No. 60272079, No. 60332030)，NationalHigh Technology Research and DevelopmentProgram of China ( 863 Program) ( No.2003AA123310) |
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| 摘 要： | Introduction OFDM1]is a special case of multicarrier trans-mission, where a single datastream is transmittedover a number of orthogonal subcarriers. Becausethe symbol duration increases for the lower rateparallel subcarriers, the relative amount of disper-sion in time caused by multipath delay spread is de-creased. Intersymbol interference is eliminated al-most completely by introducing a guard time in ev-ery OFDM symbol. Due to these advantages,OFDM is widely exploited for the communica…
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| 关 键 词： | 正交频率分割多路技术 OFDM 信道估计 时滞追踪 |
| 文章编号： | 1007-1172（2006）03-0356-05 |
| 收稿时间： | 2004-09-29 |
A Reduced Complexity Time-Delay Tracking and Channel Estimation for OFDM Systems |
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| HOU Xiao-yun,LUO Han-wen,ZHENG Bao-yu,XU You-yun,SONG Wen-tao.A Reduced Complexity Time-Delay Tracking and Channel Estimation for OFDM Systems[J].Journal of Shanghai Jiaotong university,2006,11(3):356-360. |
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| Authors: | HOU Xiao-yun LUO Han-wen ZHENG Bao-yu XU You-yun SONG Wen-tao |
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| Abstract: | This paper presented an improved channel estimator for orthogonal frequency division multiplexing (OFDM) systems using joint time delay detection and channel gain estimation. The algorithm well designs an adjustment scheme using the time correlation of time delays to increase the accuracy of the time delay detection. The most attractive advantage is that the complicated matrix calculation is replaced by the search steps to estimate the channel parameters without significantly increasing the complexity of the system. The computer simulation demonstrates that the proposed algorithm can track the time delays adaptively and improve the channel estimation performance. Consequently, the better system performance will be achieved. |
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| Keywords: | orthogonal frequency division multiplexing (OFDM) channel estimation time-delay tracking |
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