QPSK载波锁相环的鉴频辅助方法研究  

Study of the Realization of QPSK Carrier Phase-locked Loop Aided by Frequency-detection

作　　者：丁丹[1] 程乃平[2] 郝建华[2] 江修富[2] 

机构地区：[1]装备指挥技术学院研究生院,北京101416 [2]装备指挥技术学院光电装备系,北京101416

出　　处：《遥测遥控》2006年第1期21-24,38,共5页Journal of Telemetry,Tracking and Command

摘　　要：讨论克服锁相环不能兼顾捕获速度和跟踪精度的弱点,简要分析锁相环和锁频环的基本原理,引出锁相环的鉴频辅助方法,然后在此基础上对QPSK载波锁相环的鉴频辅助实现方法进行研究、仿真,仿真结果表明,在保证很高跟踪精度的前提下,附加鉴频辅助的锁相环捕获速度有了很大提高,能够很快提取出同频同相的相干载波。The operation mechanisms of the phase-locked Loop and frequency-looked loop are analyzed briefly.Then,the realization of a phaselocked loop aided by frequency-locked loop is proposed and analyzed.The simulation results show that,the phase-locked loop aided by a frequency locked loop can speed up the carrier acquisition and benefit the extraction of a coherent carrier,at the same time it can guarantee a high tracking prescision well.

关 键 词：QPSK 锁相环 锁频环 捕获 跟踪 

分 类 号：TP873[自动化与计算机技术—检测技术与自动化装置]