摘要
Ka信号模拟器可以模拟卫星星间链路高可靠性数传和高精度测距信号,同时也是Ka频段导航接收机研制过程中必不可少的专用设备。采用软件无线电设计思想,设计了Ka星间链路信号模拟器总体架构,采用标准PXI机箱结构,基于总线设计,板卡采用PXI插卡结构,实现模块化和通用化设计,可扩展性强;详细描述了核心板卡基带信号产生单元的软、硬件设计和部分关键技术及其实现方法,上位机完成多普勒仿真、电文生成和星间信号规划时隙表生成;基带信号产生板卡采用单频时分体制和QPSK正交调制技术,模拟产生高精度动态信号,并完成多径信号和干扰信号合路输出,测试结果满足工程使用需求。
The Ka signal simulator can simulate intersatellite links, high reliability data transmission and high precision ranging signals. At the same time, it is also necessary for the development of Ka band navigation receiver.Using design ideals of software radio,the overall architecture of the Ka intersatellite link signal simulator is designed.Using standard PXI chassis structure, based on general bus design,board card uses PXI card structure, realization of modularization and general purpose design,and extensibility.The hardware and software design and some key technologies of the baseband signal generator for core board cartoon are described in detail.Host computer completes Doppler simulation,message generation and inter satellite signal planning.The baseband signal generation board adopts single frequency time division system and QPSK quadrature modulation technology.Simulation of high precision dynamic signal. And complete the output of multipath signal and interference signal.The test results meet the use of the project.
作者
罗立成
LUO Li-cheng(The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China)
出处
《河北省科学院学报》
CAS
2018年第3期40-47,共8页
Journal of The Hebei Academy of Sciences
关键词
模拟器
星间链路
多普勒
时隙表
时分体制
QPSK
多径
Simulator
Intersatellite link
Doppler
Slotted table
Time division system
QPSK
Multipath
