Reduction of doppler-induced ICI by interference prediction

Yen Hui Yeh*, Sau-Gee Chen

*此作品的通信作者

    研究成果同行評審

    8 引文 斯高帕斯(Scopus)

    摘要

    Although wireless OFDM systems are robust against frequency-selective fading and ISI effect, their relatively long symbol lengths are vulnerable to time-selective fading and ICI effect in mobile environments due to Doppler spread. However, commonly a time-selective fading channel is linearly time-varying from symbol to symbol, for the existing wireless communication systems and vehicle speed limits. The linear property greatly reduces channel parameters. Based on this condition, we propose an ICI-reduction method. The ICI-reduction method first solves the linear channel parameters of each path, and then combines with a decision-feedback method to predict the ICI values from the estimated channel information, followed by the subtraction of the ICI components. Further, the proposed algorithm adopts an iterative ICI refinement technique to enhance the ICI prediction accuracy. The simulation results show that the new method can effectively reduce the ICI and error floor of symbol error rate. The proposed algorithm is further simplified. The simplified version still maintains almost the same performance as before, with a much reduced complexity.

    原文English
    頁面653-657
    頁數5
    DOIs
    出版狀態Published - 9月 2004
    事件2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004 - Barcelona, 西班牙
    持續時間: 5 9月 20048 9月 2004

    Conference

    Conference2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004
    國家/地區西班牙
    城市Barcelona
    期間5/09/048/09/04

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