摘要
扩频通信技术是指用来传输信息的射频带宽远大于信息本身带宽的一种信息传输方式,介绍了直接序列扩频系统码元同步的两种捕获方法:全并行捕获方法和串行捕获方法。详细讲述了串行捕获方法的分类和原理,并对它们作了比较,最后,就码元同步中的码元跟踪进行了介绍,给出了码跟踪环—延迟锁定环(DLL)的一般工作模型,并使用System View对其进行了仿真。
The spread spectrum technology is a form of information transmitting in which the RF bandwidth is much larger than the bandwidth of the information itself,two kinds of capture methods of direct sequence spread spectrum system code element synchronization were introduced in this paper;they were the full parallel capture method and the serial capture method.Then,classification and principles of the serial capture method were introduced in detail,and they were compared.Finally,code element tracking in code element synchronization was introduced,a general working model of code element tracking loop-delay locked loop was put forward,and it was simulated by System View.
出处
《国外电子测量技术》
2012年第9期23-26,共4页
Foreign Electronic Measurement Technology
关键词
直接序列扩频
同步
捕获
跟踪
direct sequence spread spectrum
synchronization
capture
tracking
