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《Science of Surveying and Mapping》 2011-01
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Research and realization for CAPS signal simulator

ZHU Hai-long①②,JI Yuan-fa①③,SHI Hu-li①②(①National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China;②Graduate University of Chinese Academy of Sciences,Beijing 100049,China;③Applied Science and Technology College,Guilin University of Electronic Technology,Guilin 541004,China)  
The CAPS signal simulator simulates the CAPS signal which was received by CAPS receiver in each kind of movement environment;it is used to test the performance of receiver in a variety of environments under the laboratory condition.Through the CAPS system mathematical model's research,this paper unified on the CAPS system unique concept of Satellite virtual atomic clock,analyzed the core technologies of the realization of simulator-signal delay expression and key technologies which are realized based on FPGA,and gave the method of realizing simulator in software and hardware.Finally,test results showed that the simulator can output accurate analog signal,which meet the design requirements,and can be applied to engineering practice.
【Fund】: 国家重点基础研究发展计划资助项目(编号:2007CB815500);; 国家自然科学基金资助项目(60802018)
【CateGory Index】: P228.4
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