On Practical Issues of Adaptive Modulation in OFDM Systems  

作　　者：WUJun-li YINChang-chuanI YUEGuang-xin 

机构地区：[1]CollegeofTelecommunicationEngineering,BeijingUniversityofPostsandTelecommunications,Beijing100876,P.R.China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2005年第1期36-40,共5页中国邮电高校学报（英文版）

基　　金：This work is supported by National Natural Science Fundation of China (No.90104018 and 60172052) and National"863"Project of China (No.2003AA12331004).

摘　　要：The performance of Orthogonal Frequency Division Multiplexing (OFDM) systemswith Adaptive Modulation (AM) is studied in this paper. Some factors in the system includingfrequency group, time interval Channel State Information (CSI) estimation error and channel delayare analyzed. The results of simulation prove the efficiency of AM-OFDM, and indicate CSIestimation error affects the performance of AM-OFDM seriously.The performance of Orthogonal Frequency Division Multiplexing (OFDM) systemswith Adaptive Modulation (AM) is studied in this paper. Some factors in the system includingfrequency group, time interval Channel State Information (CSI) estimation error and channel delayare analyzed. The results of simulation prove the efficiency of AM-OFDM, and indicate CSIestimation error affects the performance of AM-OFDM seriously.

关 键 词：OFDM AM rayleigh fading channel 

分 类 号：TN929.531[电子电信—通信与信息系统]