摘要
文章针对INDRA多普勒全向信标系统VRB-53D全新的构架,通过理论分析阐述了发射信号的产生和调制以及关键参数的控制过程。首先概括了VRB-53D发射机组成和各板件功能,从直接数字合成(DDS)芯片工作原理出发,对载波和边带信号的产生和调制进行了描述。随后重点分析了载波和边带信号幅度和相位控制机制,包括设备安装过程中需要注意的问题。最后通过对比几类主流全向信标设备功能实现上的不同,为技术人员对的日常维护和选型采购提供了新的思路。
According to the new architecture of INDRA DVOR system VRB-53 D, generation and modulation of the transmitted signal and the control process of key parameters is described by theoretical analysis in this paper. The composition of transmitter and function of each board is summarized at first, generation and modulation of the carrier and sideband signal is elaborated refer to operating principle of the Direct Digital Synthesis（DDS） chip. Then amplitude and phase control mechanisms of the carrier and sideband signal is elaborated, including several installation problems that need to pay attention. Finally, comparison of function realization is given out among three kinds of mainstream equipment, which extracts new ideas for the technical staff in routine maintenance and procurement selection.
出处
《江苏科技信息》
2015年第26期60-63,共4页
Jiangsu Science and Technology Information
关键词
全向信标系统
直接数字合成
幅度
相位
DVOR system
direct digital synthesis（DDS）
amplitude
phase
