状态预估法扩展数字锁相环的锁相区间  

Extending locked range of digital phase-locked loop by prediction estimation of states

作　　者：赵益波[1] 罗晓曙[2] 张道秧[3] 冯久超[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510641 [2]广西师范大学物理与电子工程学院,广西桂林541004 [3]安徽师范大学物理与信息工程学院,安徽芜湖241000

出　　处：《通信学报》2008年第9期68-72,共5页Journal on Communications

基　　金：国家自然科学基金资助项目(10247005,70571017,60572025)~~

摘　　要：提出了一种扩展正过零检测数字锁相环锁相区间的方法。首先建立了锁相环路未受控时误差变量的非线性动力学模型,得到误差变量在不动点处线性化近似预测值;然后取此近似预测值的非线性函数进行反馈控制,扩展了环路锁相区间;最后分析了受控数字锁相环的稳定性并给出了仿真结果,结果不仅证实了该方案的正确性和有效性,而且表明该方法比延迟反馈方法更加优越。A method to extend locked range of the positive zero crossing detection digital phase-locked loop（ZC-DPLL） was proposed. The nonlinear dynamical model of phase error of a non-controlled DPLL is firstly built, linearation prediction estimation of phase error in the stationary point domain is derived. Then nonlinear function of this prediction estimation is used to control by feedback. Locked range of the phase-locked loop is extended. Stability of fixed point of the controlled system is analyzed and the results by simulation are given. The effects not only show the proposed method is correct and effective but also it is superior to delay feedback method.

关 键 词：数字锁相环 状态预估 锁相 正过零检测 混沌与分岔 

分 类 号：TN850[电子电信—信息与通信工程]