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随着数字相干通信技术的发展,数字锁相环(DPLL)的应用越来越广泛。作者参阅了国外最新文献,研制出了一种有实用价值的锁相环—具有快捕鉴相器(积分式)和可变复位随机徘徊滤波器的数字锁相环。本文简述了它的工作原理,并在前人分析的基础上提出了滤波器动态概率变换特性的概念。本文着重介绍了锁相环中鉴相器和滤波器两部分电路设计及调试中的一些问题,指出了继续改进的方向,给出了最大捕捉时间的计算机模拟程序框图及部分模拟结果。
With the development of digital coherent communication technology, Digital Phase Locked Loop (DPLL) is more and more widely used. The author refers to the latest foreign literature and has developed a practical phase-locked loop - a digital phase-locked loop with a fast capture phase detector (integrated) and a variable reset random loitering filter. This article briefly describes its working principle and puts forward the concept of filter dynamic probability transformation based on the previous analysis. In this paper, some problems in the design and debugging of the phase-locked loop and phase-locked loop filter are emphatically introduced. The direction of continuous improvement is pointed out. The block diagram of computer simulation and the results of partial simulation are given.