CDMA系统中载频频偏估计的新方法  

A Novel Scheme of Estimating Carrier Frequency Offset in CDMA

作　　者：马章勇[1] 赵春明[1] 尤肖虎[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《电路与系统学报》2002年第4期49-52,共4页Journal of Circuits and Systems

基　　金：863-317-03-01-02-04-20/MII-C3G-02-04-0022项目;东大通信技术公司资助

摘　　要：本文针对存在载频频偏的CDMA系统,提出了一种新的估计该固有频偏的方法。先从理论上分析了CDMA信号经过广义平稳非相干散射信道(WSSUS)时载频频偏估计的最大似然算法;根据CDMA系统设有连续导频的特点,对该算法进行改进,大大降低了计算的复杂度,并易于工程实现。仿真结果表明,该算法能够精确地估计出载频频偏。A novel scheme of estimating the carrier frequency offset in CDMA system with the continuous pilot channel is proposed. The algorithm is derived from the maximum-likelihood(ML) rule in the wide-sense stationary un-correlative scattering channel(WSSUS). Considering the characteristic of CDMA with continuous pilot channel, a useful scheme is obtained by simplifying the algorithm .The simulation results show that the scheme can estimate the carrier frequency offset accurately and is very simple to apply in practice.

关 键 词：CDMA 载频频偏 最大似然 RAKE接收机 

分 类 号：TN929.533[电子电信—通信与信息系统]