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OFDM系统中载波间干扰抑制方法 被引量：2

ICI Cancellation Algorithms for OFDM Systems
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摘要 在高速移动通信环境下,OFDM系统在传输过程中出现的多普勒频移和收发两端本地振荡器之间的频率偏差,形成子载波间干扰(ICI)并造成系统性能降低。在分析子载波间干扰机制的基础上,讨论了自消除方法和分段均衡方法,并提出一种利用加窗技术改进的分段均衡方法。仿真结果表明,采用该改进的分段均衡方法能更好地改善系统的性能,有约2 dB的信道估计增益。 For orthogonal frequency- division multiplexing （OFDM） communication systems with high mobile speed, the frequency offset caused by Doppler frequency offset and the frequency differences will introduce inter - carriers interference （ ICI）, which degrades the performance. In this paper, the ICI problems in OFDM systems are studied. Based on the analysis of ICI mechanism, the self- cancellation scheme and segment equalization scheme are mainly discussed, and an improved segment equalization scheme based on windowed technique is proposed, the performance of these algorithms are simulated. The result shows that the improved scheme can achieve better performance.
作者 赵利利 邓平 陈红 田斌鹏
机构地区 西南交通大学信息编码与传输四川省重点实验室 中国西南电子技术研究所
出处 《电讯技术》 2008年第11期43-46,共4页 Telecommunication Engineering
基金 西南交通大学信息编码与传输四川省重点实验室开放研究基金资助课题
关键词 正交频分复用 载波间干扰(ICI) 消除算法 分段均衡 OFDM ICI cancellation algorithm segment equalization
分类号 TN911 [电子电信—通信与信息系统]
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参考文献9

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共引文献54

同被引文献20

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电讯技术
2008年 第11期

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