摘要
研究了数字costas环的基本原理及其实现技术。数字costas环能够很好的实现数字载波同步和数宇下变频。首先从理论上对数字costas环进行了分析,然后介绍了在Xilinx的FPGA芯片 XC2V500完成的硬件实现,它有效的完成中频70M,码流10Mbps的QPSK信号的载波同步和数宇下变频。
The basic principle and realization technology of digtal costas loop is researched in this paper.Digital costas loop can realize digital cattier synchronization and down convertion perfectly.At first,digital costas loop is analyzed on theory in this paper,then the hardware realization based on Xilinx＇s FPGA XC2V500 is proposed,which complete down covrertion and carrier synchrization of QPSK signal with middle frequency 70M,and code rate 10Mbps effectively
出处
《信息通信》
2006年第2期21-25,共5页
Information & Communications
