Abstract: Based on the OFDM wireless mobile environment, study around the elimination of ICI, although some traditional ICI cancellation algorithm can achieve the elimination of certain effects, there is still a lack of accuracy, lack the necessary mathematical analysis and other shortcomings. This paper, Compared the former ICI self-cancellation algorithm, Improved system model and proposed a new error rate analytical method with frequency offset and a lower inter-carrier interference method in OFDM digital communication systems, which is groups conjugate elimination algorithm. Also analyze the realization of a mathematical method for this algorithm, Simulation results demonstrate this method with other methods of BER performance comparison.

Key words: OFDM, Multipath Fading, Inter-Carrier Interference, Carrier Frequency Offset, ICI Cancellation

摘要： 以无线移动环境下的OFDM系统为研究对象，围绕载波间干扰（ICI）的消除进行研究。虽然一些传统的ICI消除算法能够达到一定的消除效果，但是还存在着精确性不足，缺少必要的数学分析等缺点。对比之前的ICI自消除算法, 改进了系统模型，提出了一个新的有频率偏移误码率分析方法和降低OFDM数字通信系统中载波间干扰的方法,即分组共轭消除算法。还分析了其得以实现的数学方法，仿真分析的结果展示了这种方法与其他方法的比特误码率（BER）性能对比。

关键词: 正交频分复用, 多径衰落, 子载波干扰, 载波频率偏移, 载波间干扰消除