基于电荷泵锁相环的快速跳频技术研究  

Research on fast frequency hopping technology based on charge pump phase⁃locked loop

作　　者：郭中会 王锋 庞洋 张一萌 陈鹏 GUO Zhonghui;WANG Feng;PANG Yang;ZHANG Yimeng;CHEN Peng(Tianjin 712 Communication&Broadcasting Co.,Ltd.,Tianjin 300462,China)

机构地区：[1]天津七一二通信广播股份有限公司,天津300462

出　　处：《电子设计工程》2024年第14期149-154,共6页Electronic Design Engineering

基　　金：国家自然基金项目(51778104)。

摘　　要：针对传统电荷泵锁相环在跳频锁定过程中锁定时间较长的问题,对传统环路滤波器的结构进行了优化,设计了一种新的环路滤波器结构。通过在环路滤波器上添加辅助预置电压电路和开关动态切换电路,实现了电荷泵锁相环的快速跳频锁定。理论分析表明,使用优化后的环路滤波器的系统锁定时间小于使用优化前环路滤波器的系统锁定时间。实测实验分析表明,使用优化后的环路滤波器的锁定时间缩短为优化前锁定时间的0.38倍(升频跳频)和0.34倍(降频跳频),由此可见,优化的环路滤波器结构可大大缩短系统跳频锁定时间。Aiming at the problem of long time locking in the traditional charged pump lock ring,the structure of the traditional circuit filter is optimized,and the structure of a new circuit filter is designed.By adding a auxiliary preset voltage circuit and switching dynamic switching circuit to the ring filter,the frequency frequency jump locking of the charging pump lock ring is realized.Theoretical analysis shows that the system lock time of the optimized circuit filter is less than the system locking time using the optimized front circuit filter.The actual test analysis shows that the lock time of the optimized loop filter is shortened to 0.38 times(frequency frequency jump)and 0.34 times(frequency frequency jump)of the lock-up time.It can be seen that the optimized loop filter structure can greatly shorten the system frequency locking time.

关 键 词：跳频通信 锁相环 锁定时间 环路滤波器 预置电压 动态切换 

分 类 号：TN99[电子电信—信号与信息处理] TN92[电子电信—信息与通信工程]