移动Wimax系统中ICI抑制技术的研究  

The research of ICI cancellation in mobile Wimax

作　　者：刘翔宇[1] 郑建宏[1] 

机构地区：[1]重庆邮电大学移动通信工程研究中心,重庆400065

出　　处：《光通信研究》2009年第1期63-66,共4页Study on Optical Communications

基　　金：国家"八六三"计划资助项目(2004AA001390)

摘　　要：载波间干扰(ICI)主要由频率偏差所引起,它破坏了正交频分复用(OFDM)系统中子载波之间的正交性,大大降低了系统的性能。在高速移动Wimax系统中,信道的时变性导致的ICI更加不容小觑。文章将一种基于部分传输序列(PTS)算法的ICI抑制技术引入到移动Wimax系统中,针对其运算复杂的弊端提出了优化算法,并通过MATLAB语言进行了系统仿真,证明了算法对于Wimax系统中抑制ICI的有效性。Mainly caused by frequency offsets, Inter-carrier Interference （ICI） disrupts the orthogonality between the sub carri- ers in the Orthogonal Frequency Division Multiplexing （OFDM） system, greatly debasing the system performance, and in the high rate mobile Wimax system, ICI caused by time varying channels is even more not to be overlooked. In this paper, a PTS algorithm-based ICI cancellation technology is introduced into the mobile Wimax system and an optimized algorithm proposed in view of the computational complexity. System simulations in Matlab language prove that this algorithm is effective in the ICI cancellation for Wimax systems.

关 键 词：正交频分复用 载波间干扰 WIMAX系统 部分传输序列 

分 类 号：TN929.533[电子电信—通信与信息系统]