基于定时和频偏的滤波器组多载波联合估计算法  

Multi-Carrier Combined Estimation Algorithm of Filter Bank Based on Timing and Frequency Offset

作　　者：杜帅[1] 武晓博[1] 周贤伟[1] 

机构地区：[1]北京科技大学计算机与通信工程学院,北京100083

出　　处：《中北大学学报（自然科学版）》2014年第1期46-49,共4页Journal of North University of China(Natural Science Edition)

摘　　要：考虑滤波器组多载波系统容易受定时偏移和频偏的影响,讨论了滤波器组多载波系统中上行多址用户的数据辅助同步问题,在每个用户的频偏足够小的情况下,通过一段导频对接收端的每个用户进行基于相偏、频偏和定时偏移的最大似然联合估计.对3种子载波分配方案进行了仿真,并对不同子载波分配方案下系统性能进行了比较,结果表明3种分配方案的同步效果都很好.Abstract： Considering the influence of timing offset and frequency offset on multi-carrier system of filter bank, data assisted synchronization question of uplink multi-access user data assisted synchronization in filter bank multi-carrier system was discussed. When frequency offset of every user is sufficiently small, maximum likelihood combined estimation based on phase offset, frequency offset and timing offset was made for each us- er of the receiver through a period of pilot. Three distribution scheme of sub-carrier were simulated, and the system performance was compared. The results show that synchronization performance of three distribution scheme is well.

关 键 词：同步 信道估计 频偏 滤波器组 

分 类 号：TN91[电子电信—通信与信息系统]