Research to reduce OFDM system ICI performance with time-domain windowing algorithm

doi:10.3778/j.issn.1002-8331.2009.19.025

Computer Engineering and Applications ›› 2009, Vol. 45 ›› Issue (19): 83-86.DOI: 10.3778/j.issn.1002-8331.2009.19.025

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Research to reduce OFDM system ICI performance with time-domain windowing algorithm

YU Yun-hao,MU Xiao-min,YANG Shou-yi,QI Lin

School of Information & Engineering，Zhengzhou University，Zhengzhou 450052，China

Received:2008-04-16 Revised:2008-07-14 Online:2009-07-01 Published:2009-07-01
Contact: YU Yun-hao

时域加窗算法降低OFDM系统ICI性能研究

于云昊,穆晓敏,杨守义,齐林

郑州大学信息工程学院，郑州 450052

通讯作者: 于云昊

Abstract

Abstract: The channel variation over an OFDM（Orthogonal Frequency Division Multiplexing） symbol destroys the orthogonality among sub-carriers，resulting in Inter-Carrier Interference（ICI） and performance degradation.A time-domain windowing technology is suggested to decrease the Inter-Carrier Interference（ICI） in an OFDM system due to frequency offset and therefore improve the system performance.Simulation results are compared for the average ICI energy and for the SIR（Signal to Interference Ratio） for the Nyquist windowing，the results of simulation show that the algorithm is effective in OFDM systems for ICI.

Key words: Orthogonal Frequency Division Multiplexing（OFDM）, Inter-carrier Interference（ICI）, Nyquist pulses

摘要： 信道的快速变化导致OFDM系统载波间的正交性遭到破坏，出现载波间干扰（ICI），系统性能明显降低。为了解决此问题，提出了一种利用时域Nyquist加窗来有效改善OFDM系统载波间干扰（ICI）的算法。利用文中的不同窗形仿真了系统的平均ICI能量和SIR，结果表明该算法对OFDM系统ICI具有较好的改善效果。

关键词: 正交频分复用, 载波间干扰, 奈奎斯特脉冲

YU Yun-hao,MU Xiao-min,YANG Shou-yi,QI Lin. Research to reduce OFDM system ICI performance with time-domain windowing algorithm[J]. Computer Engineering and Applications, 2009, 45(19): 83-86.

于云昊,穆晓敏,杨守义,齐林. 时域加窗算法降低OFDM系统ICI性能研究[J]. 计算机工程与应用, 2009, 45(19): 83-86.

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Research to reduce OFDM system ICI performance with time-domain windowing algorithm

时域加窗算法降低OFDM系统ICI性能研究

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