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高速移动信道中的ICI消除算法
ICI cancellation algorithm for high-speed mobile channel
投稿时间:2012-12-27  修订日期:2013-01-04
中文关键词:子载波干扰  多普勒频移  线性时变  迭代  高速移动
英文关键词:Inter-Carrier Interference  Doppler shift  linear time-variable  iteration  high-speed mobile
基金项目:中兴通讯-北京交通大学产学研项目、北京市科技新星合作基金资助项目(xxhz201201)
作者单位
白金波 School of Electronics and Information EngineeringBeijing Jiaotong UniversityBeijing 100044China 
陈召兵 Navy Military Representative Office in Beijing Area CommunicationBeijing 100841China 
王劲涛 Department of Electronic EngineeringTsinghua UniversityBeijing 100084 
杨 雷 School of Electronic EngineeringDongguan University of TechnologyDongguan Guangdong 523808China 
艾 渤 School of Electronic EngineeringDongguan University of TechnologyDongguan Guangdong 523808China 
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中文摘要:
      针对当前研究中的子载波干扰(ICI)消除算法不支持高速移动环境的缺点,提出一种基于线性时变模型的ICI迭代消除算法。使用相邻3个正交频分复用(OFDM)信号帧对信道进行近似处理,将时变的无线信道建模为基于每条信号径的线性时变信道,信道线性时变斜率可通过相邻的导频符号获得,这样就可以预先构造频域干扰矩阵,然后通过循环迭代的方法将接收符号中的干扰消除。仿真结果表明,本文提出的ICI迭代消除算法可有效消除高速移动信道中的ICI。在多普勒偏移小的条件下,此算法带来的性能提升更大。
英文摘要:
      Aiming at the current Inter-Carrier Interference(ICI) cancellation algorithm cannot be applied in high-speed mobile scenario, a linear time-varying model based ICI iterative cancellation algorithm is proposed. The proposed algorithm approximately processes the channel by using three adjacent Orthogonal Frequency Division Multiplexing(OFDM) signal frames. The time-varying wireless channel is modeled as a channel that every path of it is linear and time-varying, and the slope of each path can be derived from the adjacent pilot symbols. Thus the frequency-distracting matrix can be pre-constructed, and then the interference in received symbols is cancelled by loop iteration method. Simulation results show that the proposed ICI iteration algorithm can effectively eliminate the ICI in high-speed mobile channel and the performance outperforms especially under the condition of low Doppler shift.
引用本文:白金波,陈召兵,王劲涛,杨 雷,艾 渤.高速移动信道中的ICI消除算法[J].太赫兹科学与电子信息学报,2014,12(1):93~96
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