北斗B1频点中频信号仿真系统设计  

Design of IF Signal Emulation for BeiDou B1 Signal

作　　者：徐昭[1] 李荣冰[1] 谢非[1] 刘建业[1] 

机构地区：[1]南京航空航天大学自动化学院导航研究中心,江苏南京210016

出　　处：《系统仿真技术》2013年第3期229-235,共7页System Simulation Technology

基　　金：国家自然科学基金资助项目(61273057;91016019;60904091);航空科学基金资助项目(20100852010);南航基本科研业务费专项研究基金资助项目(NP2011049);南京航空航天大学研究生创新基地(实验室)开放基金资助项目(kfjj120106);中央高校基本科研业务费专项资金资助项目

摘　　要：北斗卫星导航系统是我国自主研发的全球卫星导航系统,属全球四大卫星导航系统之一,开展对北斗信号调制体制及北斗信号的研究具有重大意义。由于北斗卫星导航系统目前处于建设阶段,无法满足全球导航的实际应用需求,且基带信号处理中需要的动态航迹及弱信号环境下卫星中频信号不易获取。为解决此问题,通过对北斗B1频点信号体制及实现方式进行研究,对中频信号进行建模,进而对北斗B1频点中频信号仿真系统进行设计实现。仿真系统可完成基于设定卫星、航迹、载噪比、仿真时间的中频信号仿真并保存,为北斗基带信号处理提供可重复使用的中频数据。BeiDou satellite navigation system from China is one of the four global navigation systems. Design of simulation system of BeiDou IF signal after research on the BeiDou signal modulation system and BeiDou signal is of great significance. As BeiDou satellite navigation system is currently under construction, it is unable to meet the practical applications of global navigation. Besides, it is not easy to obtain signals of dynamic flight path and weak signal environment. Considering the above problems, this article designs the BeiDou B1 frequency IF signal simulation system based on modeling of BeiDou B1 frequency signal and research of BeiDou IF signal. The BeiDou B1 frequency IF signal simulation system is carded out of any satellites, flight path and carrier-to-noise ratio in the set time. It is proved that this system can save the BeiDou IF data and the data can be reused in the signal processing.

关 键 词：北斗 B1频点 QPSK 中频信号 卫星导航 

分 类 号：V249.32[航空宇航科学与技术—飞行器设计]