基于北斗的机载终端完好性算法仿真研究  

Simulation and research on RAIM algorithm built-in civil aviation airborne receiver based on BeiDou satellite systems

作　　者：刘瑞华[1] 邓明智[1] 蔚保国[2] 邢兆栋[2] 

机构地区：[1]中国民航大学电子信息与自动化学院,天津300300 [2]中国电子科技集团第54研究所,石家庄050081

出　　处：《中国空间科学技术》2016年第2期20-27,共8页Chinese Space Science and Technology

基　　金：民航安全能力建设项目"北斗机载设备技术标准规定与应用研究"基金(AADSA0007);中央高校基本科研业务费中国民航大学专项"基于北斗的通用航空指挥监控系统"基金(20001006);"通用机载GNSS终端自主完好性技术研究"基金(KX142600033)

摘　　要：国内外关于接收机自主完好性算法的理论研究已经成熟,但缺乏依据北斗实测数据的算法性能分析。根据北斗Ⅱ代卫星导航系统14颗星的星座状态及其公开的服务性能,结合民航非精密进近的应用需求,对机载端嵌入自主完好性算法进行仿真研究。首先通过理论仿真,分析了亚太区之内算法的可用性。其次,利用NovAtel接收机实测的北斗数据,设定不同的场景和故障类型,对算法故障检测和识别的性能进行了研究分析。通过仿真,北斗系统在亚太区之内的平均可见星个数大于7颗,平均水平保护限值小于500m,能够满足算法的要求。另通过实测研究,算法可以有效地检测并识别出异常的伪距误差(即故障卫星)。结果表明:接收机自主完好性算法适用于当前北斗Ⅱ代卫星导航系统,能够为民用航空非精密进近提供具备完好性保证的服务。Receiver autonomous integrity monitoring（RAIM）algorithm is already mature in theory.But as to BeiDou navigation satellite system（BDS）,there is rare analysis about the performance of RAIM with the observed data.According to the constellation status of BDS system and the performance of open service,based on the requirement of non-precision approach in civil aviation field,the simulation and research on RAIM were presented.Firstly,the availability of RAIM in Asia-Pacific was calculated.Then,the function and capability of failure detection and identification with the observed data from NovAtel receiver were analyzed in different scenes and fault types.The simulation results show that the average of visible satellite is more than 7,and the HPL values are less than 500 meters.Furthermore,the measured research shows that the RAIM can detect the anomaly pseudo-range.That is to say,BDS system met the needs of the RAIM.The conclusion is that the BDS is suitable for RAIM,and can provide the required navigation performance（RNP）for non-precision approach（NPA）in the civil aviation field.

关 键 词：北斗卫星导航系统 完好性 北斗实测数据 非精密进近 算法 仿真 

分 类 号：TN967.1[电子电信—信号与信息处理]