| 基于信道分割级联的正交频分复用子载波干扰消除算法 |
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| 引用本文： | 徐行辉,何晨. 基于信道分割级联的正交频分复用子载波干扰消除算法[J]. 上海交通大学学报, 2011, 45(3): 308-0312 |
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| 作者姓名： | 徐行辉 何晨 |
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| 作者单位： | （上海交通大学 电子信息与电气工程学院， 上海 200240） |
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| 基金项目： | 国家高技术研究发展计划(863)项目(2009AA011505); 国家自然科学基金资助项目(60772100,60832009,60872017) |
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| 摘 要： | 在高频段正交频分复用（OFDM）系统中子载波间干扰（ICI）较大，运用信道分割方法，将线性时变信道近似等效为时不变信道与无时延时变信道的级联，从而在接收端实现一维均衡抑制ICI，避免了高复杂度的信道频域响应矩阵的计算和求逆过程.分析和仿真表明，相对于现有的利用ICI相邻载波分布特性的低复杂度最小均方误差算法，算法在几乎不损失系统性能的同时，可将复杂度降低到O(N).
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| 关 键 词： | 正交频分复用 载波间干扰 线性时变信道 频域均衡 信道分割级联 |
| 收稿时间： | 2010-03-21 |
A Novel ICI Cancellation Algorithm Based on Channel Segmentation-cascade in OFDM System |
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| XU Xing-hui,HE Chen. A Novel ICI Cancellation Algorithm Based on Channel Segmentation-cascade in OFDM System[J]. Journal of Shanghai Jiaotong University, 2011, 45(3): 308-0312 |
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| Authors: | XU Xing-hui HE Chen |
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| Affiliation: | (School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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| Abstract: | For Orthogonal Frequency Division Multiplexing(OFDM) wireless systems with high frequency,deficiencies caused by Doppler frequency offset and the carrier phase noise are much higher,which will introduce Inter-Carrier Interference(ICI) and degrade the performance.Using channel segmentation,an equivalent method was presented in this paper,which transfers linear time-variant channel into the cascading of time-invariant channel and time-variant channel with no delay.Then onedimensional equalization can be achie... |
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| Keywords: | orthogonal frequency division multiplexing(OFDM) inter-carrier interference(ICI) linear time-variant channel frequency-domain equalization channel segmentation-cascade(CSC) |
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