TD-SCDMA系统频偏估计算法  

Frequency offset estimation algorithm for TD-SCDMA systems

作　　者：任修坤[1] 白晓络[1] 沈战峰[1] 梁云[1] 

机构地区：[1]解放军信息工程大学信息工程学院,河南郑州450002

出　　处：《光通信研究》2008年第1期65-70,共6页Study on Optical Communications

摘　　要：文章从估计范围、估计精度和运算复杂度等方面,对现有的5种频偏估计算法进行研究和仿真,给出了算法的选择依据和详细的分析结果。在此基础上,研究了利用差分相关法、基于TS0的Midamble码与SYNC-DL码的联合频偏估计算法,分析了估计范围和运算复杂度。通过仿真发现,该算法可以将频偏控制在±0.05×10-6之内,较好地实现了精确的频偏估计,解决了频偏估计精度不易提高的难题。From aspects of estimation range, estimation accuracy and calculation complexity, five existing frequency offset esti- mation algorithms are studies and emulated, and the basis of their selection and detailed analytical results given. On this basis, the joint frequency offset estimation algorithm for TSO-based Midamble code and SYNC-DL code is studied by using the differ- ential correlation method and the estimation range and calculation complexity analyzed. It is found from emulation that frequency offset can be controlled within ±0.05 ×10^-6 by using this algorithm and accurate estimation in the signal acquisition system well achieved.

关 键 词：时分同步码分多址系统 频偏估计 性能分析 

分 类 号：TN929.5[电子电信—通信与信息系统]