| 基于矩阵变换的OFDM载波干扰消除方法 |
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| 引用本文： | 梁志强,刘玉梅,李颜超.基于矩阵变换的OFDM载波干扰消除方法[J].应用科技,2009,36(11):37-40. |
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| 作者姓名： | 梁志强 刘玉梅 李颜超 |
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| 作者单位： | 1. 哈尔滨工程大学,信息与通信工程学院,黑龙江,哈尔滨,150001
2. 大庆石化公司,通讯中心乙烯电话站,黑龙江,大庆,163714 |
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| 摘 要： | 针对高速移动环境下多普勒效应引起的载波间干扰严重影响了正交频分复用系统的性能问题.该文通过对ICI（inter-carrier interference）系数的分析,在OFDM系统的发射端插入了一个可以用来改变ICI系数的变换矩阵,极大地减小了载波干扰系数.仿真结果验证了该方法的有效性,该方法不仅能够提高系统的载干比,而且能够很好地改善系统的误码率性能.与自消除方法相比,本方法更能节省系统的有效带宽,从而为高速移动环境中应用正交频分复用提供了一种有效的解决方案.
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| 关 键 词： | 正交频分复用 载波频率偏移 子载波间干扰 自消除方法 变换矩阵 |
ICI cancelation method for OFDM communication system based on matrix transformation |
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| LIANG Zhi-qiang,LIU Yu-mei,LI Yan-chao.ICI cancelation method for OFDM communication system based on matrix transformation[J].Applied Science and Technology,2009,36(11):37-40. |
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| Authors: | LIANG Zhi-qiang LIU Yu-mei LI Yan-chao |
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| Institution: | LIANG Zhi-qiang, LIU Yu-mei ,LI Yan-chao (1. College of Information and Communieation Engineering, Harbin Engineering University, Harbin 15001, China; 2. Ethylene Phone Communication Center Station, Daqing Petrochemical Company, Daqing 163714, China) |
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| Abstract: | In high-speed mobile environment, the inter-carrier interference （ICI） caused by the Doppler effect degrades the performance of the orthogonal frequency division multiplexing （OFDM） system. The author analyzed the ICI coefficients, and designed a transformation matrix inserted in the transmitter of OFDM system. This approach greatly reduced the ICI coefficients. The simulation results verified the validity of the method. This method can not only improve the CIR, but also greatly improve the system BER performance. Compared with the self-cancellation, this method could save the system bandwidth efficiency and, consequently, be an effective solution to the implementation of OFDM in high-speed mobile environment. |
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| Keywords: | OFDM CFO ICI self-cancellation scheme transformation matrix |
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