An Intercarrier Interference Mitigation Technique with SSC and ASF in OFDM Systems

摘要：

Frequency offsets in regular OFDM communicationsystems distort the orthogonality between sub-carriers, whichresults in inter-carrier interference (ICI). In order to combatthe impact of ICI on OFDM systems, an ICI mitigationtechnique by jointing symbol shift cancellation (SSC) andadjacent sub-channel filter (ASF) is proposed in this paper. Atfirst, the symbol shift cancellation method is used to cancel theimpact of ICI on the far sub-carriers, and then the adjacentsub-channel filter method is used to cancel the impact of ICIon the adjacent sub-carriers. By analyzing the distribution ofthe adjacent inter-carrier interference, a pilot-symbol schemeis proposed to improve the accuracy of channel estimation andsimplify the adjacent interference filter method. The proposedalgorithm can achieve trade-off between the bandwidthefficiency and the complexity of ICI cancellation method.Simulation results show that the technique proposed in thispaper can effectively improve BER (Bit Error Rate)performance of the OFDM system.

作者: Li Zhao Ruochun Li Ping Zhang

作者单位: School of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing, School of Information and Communication Guilin University of Electronic Technology Guilin, Guangxi,C

会议类型: 国际会议

会议名称: 2007年通信、电路与系统国际会议(2007 International Conference on Communications,Circuits and Systems Proceedings)

会议地点: 日本福冈

会议语种:英文

在线出版日期: 2007-07-11（万方平台首次上网日期，不代表论文的发表时间）