卫星通信新技术专题讲座(三) 第6讲 卫星移动通信系统中双Chirp同步方法  

Dual Chirp Based Synchronization Scheme for Satellite Mobile Communication Systems

作　　者：赵坤[1] 潘克刚[2] 陈欢[3] 郭道省[2] 林波[4] 

机构地区：[1]解放军理工大学通信工程学院研究生4队 [2]解放军理工大学通信工程学院 [3]中国人民解放军63886部队 [4]中国人民解放军77289部队

出　　处：《军事通信技术》2013年第1期101-104,共4页Journal of Military Communications Technology

摘　　要：由于卫星和通信终端之间的相对运动,卫星移动通信系统中信号传播过程中会引入多普勒频移和传播时延,这些均要求系统必须能够快速实现同步。文章介绍了一种适用于卫星移动通信系统的,基于双Chirp的信号检测和同步方案。计算机仿真结果表明该方案能够迅速、准确地实现信号检测并估计出信号中的多普勒频移和传播时延,实现系统的快速同步,且工作门限较低。As a result of the Doppler shift and time delay that are introduced by the relative movement between the satellite and the terminal, fast signal detection and system synchronization are of great importance in satellite mobile communication systems. This paper introduced a dual-chirp based signal detection and synchronization method, which is suitable for the satellite mobile communication systems. Both computer simulation results show that the introduced method can realize fast signal detection and the Doppler shift and time delay introduced by relative motion can be estimated instantly and accurately, and thus the system synchronization is set up quickly. The proposed scheme has a low work SNR threshold.

关 键 词：卫星移动通信 多普勒频移 传播时延 双线性调频信号 

分 类 号：TN919.34[电子电信—通信与信息系统]