摘要
CAPS信号模拟器,是模拟CAPS接收机在各种运动环境中接收到的CAPS信号,用于实验室条件下测试接收机在各种环境下的性能。本文通过对CAPS系统数学模型的研究,结合CAPS系统特有的虚拟星上原子钟概念,分析了模拟器实现的核心技术——信号延迟表达式,及其基于FPGA实现的关键技术,并给出了模拟器的软硬件实现方法。最后的测试结果表明模拟器可以按设计要求输出精确的仿真信号,可应用于工程实践。
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.
出处
《测绘科学》
CSCD
北大核心
2011年第1期10-12,108,共4页
Science of Surveying and Mapping
基金
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)
