摘要
分布式MESH系统,由于缺乏统一时钟同步和资源分配,节点需通过当前帧收到的信号进行符号同步而导致同步慢,系统传输效率低。针对这一问题,提出一种基于MESH系统的快速同步算法,通过对同步信号进行捕获、分级定时同步、载波和频偏估计处理,能在较短时间内进行快速同步。仿真实验表明,与已有的PMP-PHY同步相比有更快的同步时间、较好的同步精度和频偏估计误差,可以满足系统快速同步的需求。
In the distributed MESH system,the uniform synchronization and the resource assignment are not provided because of the absence of the base station. The received signal from the current frame is needed to be synchronized by the node. Therefore,the higher synchronization performance is demanded for the MESH network. Through capturing the synchronization signal,timing synchronization on grading,as well as carrier and frequency offset estimation processing,the fast synchronization algorithm is proposed based on the MESH system.The faster synchronization can be achieved in a short time and the better synchronization performance can be acquired by using the proposed algorithm.
作者
孙长龙
张婷
SUN Changlong;ZHANG Ting(Unit 91404,PLA,Qinhuangdao 066001,China;Chongqing Jinmei Communications Co.Ltd.,Chongqing 400030,China)
出处
《无线电通信技术》
2018年第5期492-496,共5页
Radio Communications Technology
关键词
MESH
同步
帧结构
频偏估计
MESH
synchronization
frame structure
frequency offset estimation
