高动态条件下BPSK信号载波的同步算法  

A BPSK Carrier Phase Recovery Algorithm with High Dynamics

作　　者：谢锡海[1] 姜晖[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710065

出　　处：《测控技术》2015年第1期146-149,共4页Measurement & Control Technology

摘　　要：在诸如火箭、导弹等飞行器的数据传输中,不可避免遇到多普勒频移的影响,多普勒效应将导致收发信号之间频率发生偏移,高动态将产生很大的多普勒频移。并且还伴随不同的加速度,这都会影响载波的同步,通过对锁相环载波同步机理的分析,提出在全数字科斯塔斯环上、改变环路带宽法进行快速、高精度载波跟踪同步,在全数字环中,变带宽法具有结构简单,容易实现的特点,设计了全数字锁相环,进行了Matlab仿真,仿真结果说明该算法是可行的,能够适应高动态大频偏环境下,载波的快速、高精度跟踪。In the data transmission such as the rocket,missile and aircraft,the influence of Doppler shift will be encountered inevitably.The Doppler effect will cause the frequency offset of transceiver signal.High dynamic will produce great Doppler frequency shift,along with different acceleration,which will affect the carrier synchronization.By the analysis of carrier synchronization mechanism for phase lock loop,variable bandwidth method of fast,high precision carrier tracking synchronization is proposed in the full digital Costas loop,in which variable bandwidth method has the advantages of simple structure,easy to implement.All digital phase locked loop is designed and simulated by Matlab.The simulation results show that the algorithm is feasible and can adapt to fast and accurate carrier tracking under the highly dynamic and large frequency offset.

关 键 词：数字锁相环 相移键控 载波同步 多普勒频移 

分 类 号：TN914[电子电信—通信与信息系统]