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数字Costas锁相环的改进及应用
引用本文:杨德勇,许林峰,樊丰,朱维乐.数字Costas锁相环的改进及应用[J].电视技术,2009,33(Z1).
作者姓名:杨德勇  许林峰  樊丰  朱维乐
作者单位:电子科技大学,四川,成都,610054
摘    要:介绍了Costas锁相环的基本原理,然后提出了一种适合电视信号色度副载波恢复的改进数字Costas锁相环的基本原理.并且详细介绍了其积分清零器、相位检测器、数字环路滤波器、NCO等各个基本部件的设计,最后在Matlab上给出了该算法的仿真结果并且做了分析.

关 键 词:Costas锁相环  积分清零器  色度副载波恢复

Improvement and Application of Digital Costas Phase-locked Loop
YANG De-yong,XU Lin-feng,FAN Feng,ZHU Wei-le.Improvement and Application of Digital Costas Phase-locked Loop[J].Tv Engineering,2009,33(Z1).
Authors:YANG De-yong  XU Lin-feng  FAN Feng  ZHU Wei-le
Affiliation:YANG De-yong,XU Lin-feng,FAN Feng,ZHU Wei-le(University of Electronic Science and Technology of China,Chengdu 610054,China)
Abstract:Firstly the basic principle of Costas phase-locked loop is briefly introduced.Then the basic principle of an improved digital Costas phase-locked loop which is suitable for color TV signal sub-carrier to resume is put forward.And designs of all its basic components which include clear-points,phase detector,digital loop filter and NCO are given.Finally,the algorithm simulation is given and analyzed.
Keywords:Costas phase-locked loop  clear-points  color subcarrier recovery decode  
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