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A GPS/BDS dual-mode positioning algorithm for a train based on CIPSO_EKF 被引量:2
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作者 LUO Miao DANG Jianwu 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2022年第1期12-20,共9页
When using global positioning system/BeiDou navigation satellite(GPS/BDS)dual-mode navigation system to locate a train,Kalman filter that is used to calculate train position has to be adjusted according to the feature... When using global positioning system/BeiDou navigation satellite(GPS/BDS)dual-mode navigation system to locate a train,Kalman filter that is used to calculate train position has to be adjusted according to the features of the dual-mode observation.Due to multipath effect,positioning accuracy of present Kalman filter algorithm is really low.To solve this problem,a chaotic immune-vaccine particle swarm optimization_extended Kalman filter(CIPSO_EKF)algorithm is proposed to improve the output accuracy of the Kalman filter.By chaotic mapping and immunization,the particle swarm algorithm is first optimized,and then the optimized particle swarm algorithm is used to optimize the observation error covariance matrix.The optimal parameters are provided to the EKF,which can effectively reduce the impact of the observation value oscillation caused by multipath effect on positioning accuracy.At the same time,the train positioning results of EKF and CIPSO_EKF algorithms are compared.The eastward position errors and velocity errors show that CIPSO_EKF algorithm has faster convergence speed and higher real-time performance,which can effectively suppress interference and improve positioning accuracy. 展开更多
关键词 global positioning system/BeiDou navigation satellite(gps/BDS)dual-mode positioning chaotic immune-vaccine particle swarm optimization(CIPSO) extended Kalman filter(EKF) positioning accuracy
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风云三号C卫星星载GPS/BDS实时定轨分析 被引量:3
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作者 凌三力 王甫红 张万威 《测绘地理信息》 CSCD 2021年第3期17-20,共4页
随着北斗卫星导航系统(BeiDou navigation satellite system, BDS)的建设与运行,低轨卫星开始搭载GPS/BDS双系统接收机以实现卫星轨道确定。利用风云三号C(FengYun-3C,FY3C)卫星星载GPS/BDS双频伪距与载波相位观测数据,设置4种仿真试验... 随着北斗卫星导航系统(BeiDou navigation satellite system, BDS)的建设与运行,低轨卫星开始搭载GPS/BDS双系统接收机以实现卫星轨道确定。利用风云三号C(FengYun-3C,FY3C)卫星星载GPS/BDS双频伪距与载波相位观测数据,设置4种仿真试验方案,分别进行星载GPS/BDS在轨实时定轨数据处理,重点进行BDS观测数据对伪距实时定轨和载波相位实时定轨的精度影响分析和算法耗时分析。结果表明,采用伪距观测值,可获得1.0 m的位置精度和1.0 mm/s的速度精度;采用载波相位观测值,可获得0.3 m的位置精度和0.3 mm/s的速度精度,且引入BDS观测值后,伪距实时定轨精度降低,相位实时定轨精度有所改善。 展开更多
关键词 低轨卫星 星载gps/BDS(BeiDou navigation satellite system) 实时定轨 风云三号C卫星
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Design of a search and rescue terminal based on the dual-mode satellite and CDMA network
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作者 ZHAO JunPing ZHANG Xuan +6 位作者 ZHENG Bing ZHOU YuBin SONG Hao SONG Wei ZHANG MeiKui LIU TongZe ZHOU Li 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2010年第12期2312-2314,共3页
The current goal is to create a set of portable terminals with GPS/BD2 dual-mode satellite positioning, vital signs monitoring and wireless transmission functions. The terminal depends on an ARM processor to collect a... The current goal is to create a set of portable terminals with GPS/BD2 dual-mode satellite positioning, vital signs monitoring and wireless transmission functions. The terminal depends on an ARM processor to collect and combine data related to vital signs and GPS/BD2 location information, and sends the message to headquarters through the military CDMA network. It integrates multiple functions as a whole. The satellite positioning and wireless transmission capabilities are integrated into the motherboard, and the vital signs sensors used in the form of belts communicate with the board through Bluetooth. It can be adjusted according to the headquarters' instructions. This kind of device is of great practical significance for operations during disaster relief, search and rescue of the wounded in wartime, non-war military operations and other special circumstances. 展开更多
关键词 gps/BD2 dual-mode satellite positioning monitoring of vital signs wireless transmission
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