无线电工程

三阶锁相环具有多种构成形式和计算方法,根据三阶锁相环的一种构成形式得到其相应的传递函数,通过对传递函数进行分析,得到三阶锁相环稳定工作和快速捕获所需要的相关条件,给出三阶数字锁相环参数计算方法和实现框图。利用matlab仿真工具,构造出实际工程系统模型,对三阶数字锁相环路进行了仿真。验证了该构成形式和计算方法能够保证三阶锁相环快速捕获和稳定工作,可以在实际工程中得到广泛应用。

Many kinds of configuration and calculation methods are provided for the third-order phase-locked loop.Based on one of transfer functions,necessary conditions to achieve the third-order phase locked are obtained,the parameter calculation method is presented and the corresponding configuration is achieved.Finally,the system model of practical engineering is constructed with matlab to simulate the third-order phase locked loop.The corresponding configuration and parameter calculation methods of are verified to be able to guarantee the fast capture and steady operation of the third-order phase locked loop.This third-order phase locked loop may have wide applications in practical engineering.