电信科学 ›› 2012, Vol. 28 ›› Issue (2): 74-78.doi: 10.3969/j.issn.1000-0801.2012.02.013

• 研究与开发 • 上一篇    下一篇

多径信道下TD-LTE系统中定时同步算法的研究

陈发堂,滕旺   

  1. 重庆邮电大学通信与信息工程学院 重庆 400065
  • 出版日期:2012-02-15 发布日期:2012-02-15
  • 基金资助:
    国家科技重大专项基金资助项目

Study of Timing Synchronization Algorithms in TD-LTE System Under Multipath Channel

Fatang Chen,Wang Teng   

  1. School of Communication and Information Engineering,Chongqing University of Posts and Telecommunication,Chongqing 400065,China
  • Online:2012-02-15 Published:2012-02-15

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摘要：

多径传播是无线信道所固有的特性，信道时延的存在将会导致符号间干扰（ISI），严重影响接收端信号的解调。本文重点研究了多径信道下TD-LTE 系统中的定时同步模块，并对基于循环前缀（CP）的能量差分算法加以改进，联合主同步信号（PSS）精确估计定时同步位置。仿真结果表明，该算法在多径衰落信道下能获得较好的定时同步性能，即使在信道时延较大的情况下也能够稳定地工作。

关键词: 多径信道, TD-LTE, 定时同步, 能量差分

Abstract:

Multipath spread is an inherent characteristic of radio channel,time delay of channel can cause interval symbols interference（ISI）which influences the demodulation of receiver's signal seriously.This paper mainly studies the timing synchronization module in TD-LTE system under the multipath channel,optimists the algorithm of power differential based on cyclic prefix（CP） and estimates the position of timing synchronization accurately joint with primary synchronization signal（PSS）.Simulation results demonstrate that the algorithm has good performance of timing synchronization under the multipath channel and can work stable especially the time delay is largely.

Key words: multipath channel, TD-LTE, timing synchronization, power differentia

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