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基于融合处理多系统接收机钟差的伪距单点定位算法研究
袁 兵,叶世榕,鲍立桂
0
(武汉大学卫星导航定位技术研究中心;福建新大陆电脑有限公司)
摘要:
多模导航定位较高的定位条件(需可见卫星总数大于5 颗) 限制了其在城市等卫星遮 挡较严重的地区充分发挥多系统的优势。基于Kalman 滤波, 提出一种将多系统接收机钟差融合 为一个系统接收机钟差的多模伪距单点定位数据处理算法, 解决了多模导航定位在可见卫星数 少于6 颗大于3 颗时无法定位的情况。分析了GPS、北斗和GLONASS 三系统一天的观测数据, 结果表明, 多系统接收机钟差融合后只需可见卫星总数大于3 颗即可进行多模伪距单点定位。
关键词:  多模  伪距单点定位  Kalman 滤波  接收机钟差  数据处理
DOI:
基金项目:
Multi⁃mode Single Point Positioning Based on Processingof Integration Multi⁃system Clock Offset
YUAN Bing,YE Shi⁃rong,BAO Li⁃gui
()
Abstract:
The relatively high condition of multi⁃mode navigation localization, in which the number of visible satellites must be more than five, confines its advantages of multi⁃system in cities or other places, where visible satellites would be kept out seriously. This paper proposed a data processing algorithm of multi⁃mode single point positioning, which fused multi⁃ system clock offset to single⁃system clock offset based on Kalman filter. This algorithm solved the problem that multi⁃mode navigation localization would not be converged when the number of visible satellites is less than six, but more than three. Observation data of GPS, COMPASS and GLONASS in one day has been analyzed, which can come to a conclusion that when the number of visible satellites is more than three, multi⁃mode single point positioning can be converged if multi⁃sys⁃ tem clock offset is integrated.
Key words:  Multi⁃mode  Single point positioning  Kalman filter  Receiver clock offset  Data processing

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