| 对抗ICI的增强型载波干涉OFDM |
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| 引用本文： | 陶晓明,张超,陆建华.对抗ICI的增强型载波干涉OFDM[J].清华大学学报(自然科学版),2009(4). |
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| 作者姓名： | 陶晓明 张超 陆建华 |
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| 作者单位： | 清华大学电子工程系; |
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| 基金项目： | 国家“九七三”重点基础研究项目(2007CB310601) |
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| 摘 要： | 针对载波干涉正交频分复用(CI-OFDM)系统不能对抗高速移动环境下的Doppler扩展问题,为了进一步提高系统在高速移动环境(例如,300 km/h)下的性能,提出了一种新型的增强型CI-OFDM(ECI-OFDM)技术。通过优化设计CI码,添加频率域的循环前缀和循环后缀,并借鉴自干扰消除算法,得到正负间隔的ECI码,可以有效地对抗Doppler扩展造成的子载波间干扰(ICI)。理论分析及仿真结果表明:与传统的CI-OFDM系统相比,ECI-OFDM可以将系统能够支持的移动速度提高1倍以上。
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| 关 键 词： | CI-OFDM Doppler扩展 ECI-OFDM 自干扰消除算法 子载波间干扰（ICI） |
Enhanced CI-OFDM in inter carrier interference cancellation |
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| TAO Xiaoming,ZHANG Chao,LU Jianhua.Enhanced CI-OFDM in inter carrier interference cancellation[J].Journal of Tsinghua University(Science and Technology),2009(4). |
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| Authors: | TAO Xiaoming ZHANG Chao LU Jianhua |
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| Institution: | Department of Electronic Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The standard carrier interferometry orthogonal frequency division multiplexing(CI-OFDM) cannot effectively handle the Doppler spread in high-speed mobile environments.This paper describes an enhanced CI-OFDM(ECI-OFDM) to improve system performance in high-speed mobile environments up to 300 km/h.A cyclic prefix and a self-cancellation scheme are employed in the frequency domain using periodic expanded CI codes to cancel the inter-carrier-interference(ICI) caused by the Doppler spread.Theory analyses and sim... |
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