基于CPLD的GPS时钟驯服模块设计与实现

Design and Implementation of GPS Clock Tame Module Based on CPLD

现代通信系统中,高稳定性和高准确度的参考时钟源非常重要,为整个通信系统提供频率参考。基于此需求设计并实现了一款基于CPLD的GPS时钟驯服模块,给出了该模块的基本框架和构成,介绍GPS时钟驯服使用的关键技术——CPLD鉴相、PI调节及调节保持策略,描述了模块的工作原理和控制流程,从理论计算和实际使用验证了设计的可用性。

In Modem communication systems, the high stability, and high accuracy of the reference clock source are very important for the entire communication system to provide frequency reference. Based on this requirement, this paper designs and implenlents a CPLD-based GPS clock taming module, and introduces its basic frame and composition. And the key technologies used for GPS clock tame are described, such as CPLD phase-detector, PI adjustment, regulation and maintenance strategy. The working principle and control flow of the module are introduced. Finally the availability of this design is verified based on theoretical calculation and practical use.