摘要
针对长序列互相关定时同步性能受频偏影响的问题,提出了一种分段频偏补偿的定时同步算法。该算法在分段互相关的基础上,使用频偏补偿替代传统的绝对值操作,在减少载波频偏对同步峰值影响的同时不增加噪声均值。理论分析和仿真结果表明,改进方法定时同步性能优于传统分段方法,适用于低信噪比大频偏的无线通信系统。
To solve the problem that the timing synchronization performance of long sequence cross-correlation is affected by frequency offset,a timing synchronization algorithm of segment cross-correlation with frequency offset compensation is proposed.Based on segment cross-correlation,the algorithm uses frequency offset compensation instead of the traditional absolute value operation,which can reduce the effect of carrier frequency offset on the synchronous peak without increasing the mean noise a lot.Theoretical analysis and simulation results show that the improved method has better timing synchronization performance than the traditional segmentation method and is suitable for wireless communication systems with low signal-to-noise ratio and large frequency offset.
作者
付博炜
李明齐
FU Bowei;LI Mingqi(Shanghai Advanced Research Institute,Chinese Academy of Science,Shanghai 201210,China;School of Information Science and Technology,ShanghaiTech University,Shanghai 201210,China;University of Chinese Academy of Science,Beijing 100049,China)
出处
《电讯技术》
北大核心
2021年第6期744-749,共6页
Telecommunication Engineering
基金
国家重点研发计划(2019YFF0216603,2019YFB1802703)。
关键词
无线通信
定时同步
互相关
载波频偏
分段频偏补偿
wireless communication
timing synchronization
cross-correlation
carrier frequency offset
segment frequency offset compensation
