摘要
卫星导航信号模拟器是卫星导航用户机检测和开展系统应用研究的关键设备。这里主要研究了信号模拟中的高精度时延控制和多普勒处理技术,设计并提出了采用高精度数字时延滤波器实现码相位时延精确控制的方案。通过多普勒调制和数字基带合成技术实现对卫星导航信号多普勒频移的模拟。仿真结果表明,该方法模拟仿真精度高,合理可行。
The satellite navigation signal simulator is the key equipment for the test of satellite navigation user terminal and the research of system application.The technology of high accuracy time delay control of code phase and Doppler processing was mainly studied.Based on the high accuracy digital time delay filter,the scheme of high accuracy time delay control of code phase was proposed.The Doppler frequency shift simulation was solved by using the Doppler modulating and digital baseband synthesization.The simulating result manifested that the scheme proposed was realizable,and the high accuracy of simulation was able to be acquired.
出处
《测绘科学技术学报》
北大核心
2010年第3期165-168,共4页
Journal of Geomatics Science and Technology
关键词
卫星导航信号模拟器
码相位
时延控制
多普勒模拟
数字基带合成
satellite navigation signal simulator
code phase
time delay
Doppler simulation
digital baseband synthesization
