摘要
针对在低信噪比和高动态同存条件下的卫星定位导航系统的接收机载波实现同步的问题,设计了基于AR双谱估计的载波捕获模块和基于锁频环(PLL,Phase Locked Loop)/锁相环(FLL,Frequency Locked Loop)的载波捕获模块,并在此基础上提出了一种新型的载波同步方案。该载波同步方案可应用于低信噪比和高动态同存的条件下接收机设计中,通过对该方案进行MATLAB仿真,结果表明了该方案能有效地解决了载波快速捕获与精确跟踪的问题。
To actualize carrier synchronization of the receive system of satellite navigation with low signal-to-noise ratio （SNR）and High Dynamic, two modules are designed. One bases on AIR bispectrum estimation using for carrier capture, and the other bases on PI.L（Phase Locked Loop）/FLL（Frequency Locked Loop）using for carrier Tracking. Then a method of Carrier Synchronization which bases on the two modules is proposed to improve the performance of the receive system. This method is simulated by MATLAB, and the results show that it can effectively solve the problem of carrier quickly capture and carrier Accurate Tracking.
出处
《电子测量技术》
2009年第5期40-43,共4页
Electronic Measurement Technology
关键词
低信噪比
高动态
载波同步
low signal-to-noise ratio（SNR）
high-dynamic
carrier synchronization
