摘要
导航信号模拟器需要模拟电离层引起的延时和色散效应,与传统导航信号相比,新体制高阶BOC信号具有更宽的带宽,而传统导航信号的模拟方法会引入不可忽略的电离层延迟建模误差。通常情况下BOC(14,2)信号上下边带信号的电离层延迟可达到米级的差异。提出运用双边带模型的BOC信号模拟方法并进行了仿真,结果表明改进方法可以准确模拟电离层色散效应的影响。
The time delay and dispersion effects caused by the ionosphere need to be simulated in the navigation signal simulator. The higher order BOC modulation signal in the new generation of satellite navigatioo signals has a wider bandwidth than the traditional navigation signal. The simulation method of the traditional navigation signal can lead to the non-negligible modeling error of the ionosphere delay. An improved simulation method of BOC signal based on the bilateral model was presented, and was verified by simulation. The simulation results show that there is an error of meter in the ionosphere delay of the BOC （14, 2） signal, and the improved method can accurately simulate the effect of the ionosphere dispersion.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2015年第6期74-77,共4页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(61403413)
关键词
卫星导航
BOC调制
电离层效应
信号模拟
satellite navigation
BOC modulation
ionosphere effect
signal simulation
