| OFDM系统中ICI消除方法的性能比较 |
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| 引用本文： | 张国园,王彦,黄元玲. OFDM系统中ICI消除方法的性能比较[J]. 吉首大学学报(自然科学版), 2013, 34(3): 45-48. DOI: 10.3969/j.issn.1007-2985.2013.03.010 |
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| 作者姓名： | 张国园 王彦 黄元玲 |
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| 作者单位： | （南华大学电气工程学院，湖南 衡阳 421001） |
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| 基金项目： | 湖南省大学生研究型学习和创新性实验计划资助项目（2011185） |
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| 摘 要： | OFDM系统对频率偏移极为敏感，频率偏移将导致子载波之间失去正交性，于是产生子载波干扰(ICI)，从而降低系统性能.针对载波间的干扰，通过对由频率偏移导致的ICI进行理论分析，对抑制ICI的3种方法（基于符号变换的自消除方法、扩展（Kalman）滤波方法（EKF）及频域编码法）进行了性能比较，比较结果表明，频率编码法在不减少频谱利用率的前提下能有效地降低系统的频间干扰.
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| 关 键 词： | OFDM 载波间干扰 频率偏移 |
Analytical Study of ICI Cancellation in OFDM Systems |
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| ZHANG Guo-yuan,WANG Yan,HUANG Yuan-ling. Analytical Study of ICI Cancellation in OFDM Systems[J]. Journal of Jishou University(Natural Science Edition), 2013, 34(3): 45-48. DOI: 10.3969/j.issn.1007-2985.2013.03.010 |
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| Authors: | ZHANG Guo-yuan WANG Yan HUANG Yuan-ling |
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| Affiliation: | (College of Electrical Engineering,University of South China,Hengyang 421001,Hunan China) |
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| Abstract: | OFDM syetems are very sensitive to frequency offset.Frequency shifts lead to loss of orthogonality between subcarriers,which will cause intercarrier interference and degrade the system performance.In view of the interference,the ICI caused by frequency offset is analyzed in theory.This paper compares the performances of three methods of ICI cancellation based on symbol transform self-cancellation,extended Kalman filtering and frequency domain coding.The result shows that Frequency coding suppresses ICI effectively without reducing spectrum utilization. |
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| Keywords: | OFDM intercarrier interference frequency offset |
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