改进的时分长期演进系统定时同步算法

doi:10.11772/j.issn.1001-9081.2014.07.1974

计算机应用 ›› 2014, Vol. 34 ›› Issue (7): 1974-1977.DOI: 10.11772/j.issn.1001-9081.2014.07.1974

改进的时分长期演进系统定时同步算法

田增山,陈波,袁正午

重庆邮电大学通信与信息工程学院，重庆 400065

收稿日期:2014-01-06 修回日期:2014-02-24 出版日期:2014-07-01 发布日期:2014-08-01
通讯作者: 陈波
作者简介:田增山(1968-)，男，河南信阳人，教授，博士，主要研究方向：个人通信、卫星导航、无线定位、信号检测与处理；陈波(1988-)，男，重庆合川人，硕士研究生，主要研究方向：TD-LTE物理层算法、无线定位;袁正午(1968-)，男，湖南人，教授，博士，主要研究方向：位置服务、移动定位、射频跟踪、地理信息系统集成。
基金资助:
国家科学与技术重大专项;重庆市基础与前沿研究计划项目;重庆市教委科学技术研究项目;重庆市教委优秀成果转化项目;重庆邮电大学博士启动基金;重庆邮电大学青年科学研究项目

Improved time synchronization algorithm for time division long term evolution system

TIAN Zengshan,BO Chen,YUAN Zheng-Wu

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2014-01-06 Revised:2014-02-24 Online:2014-07-01 Published:2014-08-01
Contact: BO Chen
Supported by:
National Science and Technology Major Project;Transformation Project of Excellent Achievement of Chongqing Municipal Education Commission;Startup Foundation for Doctors of CQUPT;Science Foundation for Young Scientists of CQUPT

摘要/Abstract

摘要：

针对现有时分长期演进(TD-LTE)系统定时同步算法复杂度过高以及抗频偏性能较差的问题，提出一种基于辅同步信号(SSS)时域共轭对称性的定时同步算法。该方法对接收信号本身进行滑动共轭对称相关运算，在明显的相关峰值处捕获SSS，然后利用捕获到的SSS的位置联合小区组内ID检测，实现循环前缀(CP)类型的判决，从而完成了定时同步。理论分析和仿真结果表明，该方法具有很强的抗频偏性能、低复杂度，且较常规算法可靠性有了很大提高，同时在多径信道下性能良好。该方法已成功应用于TD-LTE第三方终端探测系统中，验证了其可行性。

Abstract:

To deal with high computing complexity and bad anti-CFO (anti-Carrier Frequency Offset) performance of conventional time synchronization algorithms for Time Division Long Term Evolution (TD-LTE) system, an improved algorithm based on Secondary Synchronization Signal (SSS) conjugate-symmetric in time domain was proposed in this paper. For the algorithm, SSS location was estimated as the peak of cross-correlation of received signal and its time reversal. And by combining SSS location with the detection of cell group ID, CP (Cyclic Prefix) type could also be judged. Analysis and simulation results demonstrate that the improved algorithm has low computing complexity, good performs on anti-CFO and better reliability compared with normal methods, especially, it also has good performs in multi-path channels. By applying to the third party TD-LTE UE detecting system, the algorithm is proved to be effective and feasible.

中图分类号:

TN929.5

田增山陈波袁正午. 改进的时分长期演进系统定时同步算法[J]. 计算机应用, 2014, 34(7): 1974-1977.

TIAN Zengshan BO Chen YUAN Zheng-Wu. Improved time synchronization algorithm for time division long term evolution system[J]. Journal of Computer Applications, 2014, 34(7): 1974-1977.

参考文献

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改进的时分长期演进系统定时同步算法

Improved time synchronization algorithm for time division long term evolution system

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