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。
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.
出处
《电信科学》
北大核心
2012年第2期74-78,共5页
Telecommunications Science
基金
国家科技重大专项基金资助项目(No.2009ZX03002-009)
关键词
多径信道
TD-LTE
定时同步
能量差分
multipath channel
TD-LTE
timing synchronization
power differential
