一种改进数字COSTAS环在载波同步中的研究  

Research on improved digital COSTAS loop in carrier synchronization

作　　者：李非 肖琨[1] LI Fei;XIAO Kun(College of Electronic Engineering,Guangxi Normal University,Guilin 541004,Guangxi Province,China)

机构地区：[1]广西师范大学电子工程学院,广西桂林541004

出　　处：《信息技术》2020年第10期12-18,共7页Information Technology

基　　金：国家自然科学基金(61861006)。

摘　　要：COSTAS环在数字通信系统中有着十分重要的地位,是通信系统中载波同步的核心技术之一。文中首先对经典的COSTAS环进行了介绍,针对经典COSTAS环所存在的问题,对经典COSTAS环的鉴相器和环路滤波器做了改进,并利用FPGA平台实现设计。FPGA硬件仿真和MATLAB软件仿真的结果表明,改进后的数字COSTAS环对于经典结构具有较快的频偏捕获性能以及更高的频偏跟踪精度,从而提高了COSTAS环的载波同步性能。As one of the core technologies of carrier synchronization,COSTAS loop plays a very important role in communication system.Firstly,COSTAS loop is introduced classical,aiming at the problems of the classic COSTAS loop,the phase detector and loop filter of the classic COSTAS loop are improved,and the FPGA platform is used to realize the design.The results of FPGA hardware simulation and MATLAB software simulation show that,the improved digital COSTAS loop has better frequency offset acquisition performance and higher frequency offset tracking accuracy than the classical COSTAS loop,which can improve the carrier synchronization performance of COSTAS loop.

关 键 词：数字COSTAS环 FPGA 载波同步 

分 类 号：TN911.8[电子电信—通信与信息系统]