The Development of Optic Digital Loop Carrier(DLC) System 光纤数字环路载波(DLC)系统的发展
Digital loop subscriber carrier 数字式环路用户载波器
Digital costas loop can realize digital carrier synchronization and down convertion perfectly. 数字costas环能够很好的实现数字载波同步和数宇下变频。
This paper combines the frequency track and phase track method, uses the digital COSTAS loop to realize the carrier recovery. 本文采用频偏估计和相位估计结合的方法,利用数字COSTAS环作为载波跟踪环来实现载波恢复。
The thesis introduces the implementation of uClinux to ARM7, arithmetic of digital baseband signal and the design of code tracking loop, and carrier tracking loop are discussed. 软件部分介绍了操作系统uClinux在ARM上的移植、基带信号处理的算法、分析GPS信号的搜索策略,给出载波跟踪环路和伪码跟踪环路的设计方案。