一种甚高频窄带通信系统的高精度时间同步算法  

A High Precision Time Synchronization Algorithm for VHF Narrowband Communication System

作　　者：沈其林 李冬 潘雅茹 SHEN Qilin;LI Dong;PAN Yaru(No.50 Institute of CETC,Shanghai 200331,China)

机构地区：[1]中国电子科技集团公司第五十研究所,上海200331

出　　处：《通信技术》2022年第10期1270-1276,共7页Communications Technology

摘　　要：甚高频窄带通信的通信距离较短,抗干扰能力较差,系统对时间同步的要求比较高,而目前的时间同步算法无法满足同步高精度、低抖动的要求,且对硬件单元要求较高。联合分组训练序列法与最小二乘拟合法,提出了一种甚高频窄带通信系统的时间同步算法,提高了长距离、低信噪比下的系统同步性能,具有低复杂度、高精度、低抖动的特点。最后,MATLAB仿真验证了算法的优越性。In VHF narrowband communication,the communication distance is short,the anti-interference ability is poor,and the system has high requirements for time synchronization,while the current time synchronization algorithm cannot meet the requirements of synchronization with high accuracy and low jitter,and the hardware unit requirements are high.In this paper,a time synchronization algorithm for VHF narrowband communication system is proposed by combining group training sequence method and least-squares fitting method,which improves the system synchronization performance under long distance and low signal-to-noise ratio with low complexity,high precision and low jitter features.Finally,MATLAB simulation verifies the effectiveness of the algorithm.

关 键 词：时间同步 最小二乘拟合 互相关 训练序列 

分 类 号：TN914.3[电子电信—通信与信息系统]