OFDM的两种时域均衡的性能比较  

Two Performances Equalization of OFDM

作　　者：周瑾[1] 张光星[1] 李祥明[1] 

机构地区：[1]重庆邮电大学移动通信重点实验室,重庆400065

出　　处：《通信技术》2006年第S1期23-24,27,共3页Communications Technology

基　　金：国家自然科学基金资助项目(F010103);重庆市自然科学基金资助项目(CSTC2004BB602)

摘　　要：简要介绍了0FDM的单载波调制的有效调制方法,该方法把整个信道化为64子信道,应用16QAM传输,每个子载波均传输相同的比特数4.文中不使用信道编码,而分别使用迫零均衡和最小均方误差均衡.通过仿真,比较这两种均衡的性能.结果表明在0FDM的单载波调制下,在非理想信道以及存在噪声的情况下,迫零均衡的性能要优于最小均方误差均衡的性能.In this paper,we will outline anefficient modulation method,called OFDM (Orthogonal Frequency Division Multiplexing),for single-carrier.Such method divides the whole channel into 64 sub-channels and use 16QAM during transmission,each sub-carrier will carry 4 bits equally.Instead of channel coding,we' ll use both zero-forcing equalization and minimum mean square error (MMSE) equalization respectively,and compare their equalization performances by simulating.The results show that with such an OFDM method,the performance of zero-forcing equalizer is better than the other,when the channel produces noise or its character is not ideal.

关 键 词：正交频分复用 时域均衡 数字通信 迫零均衡 最小均方误差均衡 

分 类 号：TN919.3[电子电信—通信与信息系统]