动态环境中频数字接收机载波同步研究

文中介绍了中频数字接收机的实现结构和关键的载波同步技术，针对动态环境下载波同步需要解决的捕获带宽，捕获速度与精度的矛盾，利用传统锁频（FLL）环路和锁相（PLL）环路的优点，设计了一种适合动态环境下中频数字接收机的FLL＋PLL联合工作的方案。最后结合计算机仿真分析结果，证明了该方案的可行性和优越性，为进一步的硬件实现提供了参考。

Carrier Synchronization for IF Digital Receiver in Dynamic Environment

The structure of IF digital receiver and the key technologies for carrier synchronization are presented.For the problem of between acquisition band,speed and precision in dynamic environment,and by taking advantage of the traditional FLL loop and the PLL loop,a scheme of FLL+PLL for IF digital receiver in dynamic environment is proposed.Simulation results indicate that this scheme is feasible and practicable,and could serve as a reference for hardware realization.