GPS/BDS接收机端系统偏差实时估计方法A real-time estimation algorithm for the GPS/BDS inter-system biases at the receiver end
隋心,邹鑫慈,徐爱功,陈玮娴
摘要(Abstract)：
针对GPS-BDS系统偏差会导致GPS和BDS系统间的混合双差模糊度不具有整数特性,且其不完全稳定的问题,该文提出一种GPS/BDS系统偏差实时在线估计方法。通过将双差模糊度以单差模糊度之差的形式进行求解,然后再将以周为单位的单差模糊度投影为双差模糊度,以此消除GPS和BDS不同波长的影响;在此基础上,采用Kalman滤波对系统偏差进行实时动态估计。实验结果表明,该方法采用较少历元的观测数据便可使系统偏差收敛,并且收敛后十分稳定,可以将其作为校正参数;加入系统偏差改正的GPS/BDS紧组合定位在恶劣环境下表现良好,可将模糊度固定平均所需时间缩短29%,模糊度固定成功率提高45%。
关键词(KeyWords)： GPS;BDS;系统偏差;整周模糊度
基金项目(Foundation): 国家重点研发计划项目(2016YFC0803102);; 辽宁省教育厅创新团队项目(LT2015013);; 国家自然科学基金项目(41501504);; 大学生创新创业训练计划项目(201610147039,201610147078);; 现代城市测绘国家测绘地理信息局重点实验室开放课题资助项目(20111203W)
作者(Author): 隋心,邹鑫慈,徐爱功,陈玮娴
DOI: 10.16251/j.cnki.1009-2307.2016.12.022
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