NOVEL ICI CANCELLATION ALGORITHM IN OFDM SYSTEMS  

作　　者：XuChangqing ZhangXiaobo SongWentao 

机构地区：[1]Dept.ofElectronicEng.,ShanghaiJiaotongUniv.,Shanghai200030

出　　处：《Journal of Electronics(China)》2004年第1期78-82,共5页电子科学学刊（英文版）

摘　　要：The Bit Error Rate (BER) caused by Inter Carrier Interference (ICI) increases greatly with the increase of frequency offset in Orthogonal Frequency Division Multiplexing (OFDM) systems. According to a typical OFDM signal model, this letter proves that the coefficient matrix of ICI is a unitary matrix whose inverse matrix is much easier to get, and then proposes a new ICI cancellation method with less computation complexity by sending typical pilot symbols. Compared with two existing ICI cancellation methods, self-cancellation and windowing cancellation, it is shown that the proposed algorithm can cancel ICI better and overcome the limitation of the two traditional methods.The Bit Error Rate (BER) caused by Inter Carrier Interference (ICI) increases greatly with the increase of frequency offset in Orthogonal Frequency Division Multiplexing (OFDM) systems. According to a typical OFDM signal model, this letter proves that the coefficient matrix of ICI is a unitary matrix whose inverse matrix is much easier to get, and then proposes a new ICI cancellation method with less computation complexity by sending typical pilot symbols. Compared with two existing ICI cancellation methods, self-cancellation and windowing cancellation, it is shown that the proposed algorithm can cancel ICI better and overcome the limitation of the two traditional methods.

关 键 词：OFDM Inter-carrier interference Pilot symbol 

分 类 号：TN915.0[电子电信—通信与信息系统]