高码率QPSK全数字接收机关键技术研究  

Research on Key Technology of All Digital High Data Rate QPSK Receiver

作　　者：代涛[1] 陈大海[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900

出　　处：《现代电子技术》2007年第19期112-114,共3页Modern Electronics Technique

摘　　要：时钟同步和载波同步是接收机的关键问题,传统模拟解调可靠性、稳定性差,调试复杂。介绍了一种高码率QPSK全数字接收机的定时同步和载波同步方法,他采用数字转换跟踪环和COSTAS环实现同步。同步计算全部由软件实现,设计灵活。仿真及实测结果表明,该方法是可行的,适合FPGA实现。Time synchronization and carrier wave synchronization are cruxes of receiver. A kind of time synchronization and carrier wave synchronization method is introduced in this paper,DTTL and COSTAS loop are used to achieve synchronization. All calculations of synchronization are completed by software,so the project is flexible. The results of simulate and practically test indicate that this method is feasible and suit the implement in FPGA.

关 键 词：全数字接收机 定时同步 载波同步 QPSK 

分 类 号：TN76[电子电信—电路与系统]