一种消除OFDM子信道干扰的均衡新方法  

A Novel Equalization Method by Cancelling Interchannel Interference in OFDM System

作　　者：蒋欣[1] 罗汉文[1] 宋文涛[1] 

机构地区：[1]上海交通大学电子工程系移动通信实验室,上海200030

出　　处：《电子学报》2004年第4期536-539,共4页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60272079);国家863计划基金(No.2001AA123014)

摘　　要：在实际的OFDM系统中,符号间干扰(ISI)以及子信道干扰(ICI)仍然是导致系统性能下降的重要因素. 本文对循环前缀(CP)长度较短时,产生ISI和ICI机理进行分析和研究,在此基础上提出一种消除ICI的频域均衡的简 化方法.经过计算机仿真,结果表明,在宽带无线局域网中采用该算法,误码率明显降低,并且简单实用、易于实现.In the actual OFDM system, the intersymbol interference and interchannel interference can be a dominant factor which degrades the system performance. This paper analyzes how ISI and ICI are produced without insetting GP.Then a simple method of cancelling ICI which can be done in frequency domain based on this theory is proposed. As to the equalization methods discussed in the paper, simulation results are provided which show that in Broadband Wireless LAN bit-error rate (BER) is distinctly reduced and it is applied easily.

关 键 词：正交频分复用(OFDM) 频域均衡 符号问干扰(ISI) 子信道干扰(ICI) 信道冲击响应(CIR) 

分 类 号：TN911.5[电子电信—通信与信息系统]