高阶BOC信号电离层色散效应的模拟方法  

Ionosphere dispersion effects simulation for high order BOC modulated signals

作　　者：庞晶[1] 刘瀛翔[1] 唐小妹[1] 欧钢[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》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)

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.

关 键 词：卫星导航 BOC调制 电离层效应 信号模拟 

分 类 号：TN967.1[电子电信—信号与信息处理]