基于虚载波估计方法消除载波间干扰  

Inter-carrier interference elimination based on estimation of virtual carriers

作　　者：闫龙 郑妍 李颜超[2] 

机构地区：[1]中国联合通信网络有限公司哈尔滨分公司,黑龙江哈尔滨150001 [2]大庆石化公司通讯中心,黑龙江大庆163714

出　　处：《应用科技》2012年第2期11-14,共4页Applied Science and Technology

基　　金：中国博士后科学基金面上资助项目(20110491087)

摘　　要：在OFDM系统中当载波频率偏移越来越大、调制阶数越来越高时,原有的载波间干扰消除方法将不再适用.文中提出了一种基于虚载波估计的方法来消除载波间干扰,该方法能够在调制阶数较高、频偏较大时的系统误码率得到改善,降低系统的敏感度.最后使用仿真数据检验了该方法的有效性.In an OFDM system, when the carrier frequency offset becomes larger and larger, the modulation order will be increasingly rising, and the existing inter-carrier interference （ICI） elimination method will not be applicable. To overcome this shortcoming, this paper presents a method based on virtual carriers estimation to eliminate inter-carrier interference, which can improve the BER performance of OFDM system when the modulation order and the shift in frequency are both larger, and thereby reduce the sensitivity of the system. Finally, the validity of the method is tested with simulation data.

关 键 词：载波间干扰 虚载波 误码率 

分 类 号：TN957[电子电信—信号与信息处理]