CMMB系统的整数倍载波频偏估计方法  

Integer Carrier Frequency Offset Estimation Method for China Mobile Multimedia Broadcasting System

作　　者：邵楠[1] 陈赟[1] 李斯梦[1] 曾晓洋[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《计算机工程》2010年第17期120-122,共3页Computer Engineering

基　　金：上海市科委基金资助项目(08700741100)

摘　　要：在中国移动多媒体广播(CMMB)系统中,发送端的加扰使基于导频相关的整数倍载波频偏估计方法无法正常工作。针对该问题,提出一种适用于CMMB系统的整数倍载波频偏估计方法。利用CMMB帧结构中特有的同步信号进行整数倍载波频偏估计,避免发送端加扰对频偏估计的影响。仿真结果表明,该方法在低信噪比、高多普勒频偏的多径信道下仍具有良好的估计性能。Due to the data scrambling in the transmitter, the conventional Integer cartier Frequency Offset（IFO） estimation method based on pilots correlation no longer works efficiently in China Mobile Multimedia Broadcasting（CMMB） system. In order to solve the problem, this paper proposes a new IFO estimation method for CMMB system. IFO is estimated with the synchronization signal which is a special part of CMMB frame structure. With the method, the influence on the carrier offset estimation caused by scrambling can be avoided. Simulation results show that even under multipath channel with low SNR and high Doppler frequency offset, the method still performs well.

关 键 词：中国移动多媒体广播标准 同步信号 整数倍载波频偏估计 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]