利用一机多天线接收机估计短基线多路径的方法  

The Methond of Estimating the Short Baseline Multipath Error by Using Multi-Antennas Receiver

作　　者：曾志[1,2] 宋乐[1,2] 夏俊晨[1,2] 张千千[1,2] 华一飞[1,2] 

机构地区：[1]华东师范大学信息科学技术学院通信工程系,上海200241 [2]空间信息和定位导航上海高校工程中心,上海200241

出　　处：《全球定位系统》2015年第1期17-22,共6页Gnss World of China

基　　金：国家自然科学基金(批准号:61372086;41201380);上海市科委科技创新行动重大项目(编号:13411500300)

摘　　要：现代高精度GNSS定位技术应用日益广泛,采用差分技术可以消除大部分误差。而多路径误差作为测量的主要误差源之一,依赖于接收机天线周围环境和天线的几何反射特征,由于其随机性和复杂性,不能通过差分直接削弱或消除。而多路径效应的存在严重影响了测量的精度,甚至会导致信号失锁。对通过共用一个时钟多个天线的卫星接收机系统估计多路径提出了新型方法,利用短基线的单差技术和数学模型找到卫星高度角和方位角与多路径之间的关系,建立了对多路径进行估计的短基线模型。通过实验数据的处理得到了比较满意的结果,并且验证了短基线模型的正确性和实用性。The high precision modern GNSS technology is increasing widely used. It can remove most of the errors by adopting the differential technology and the corrected-model. Multipath error is the major error of measurement. As it＇ s randomness and complexity which depend on the surroundings of receivers＇ antennas and the geometric characteristics of reflection. It can＇t be weakened or eliminated by using the differential technology directly. The multipath error seriously affected the precision of measurement and can even cause the lock-lose of the signal. Proposing a new method to estimate the multipath error by using a satellite receiver with multi antennas which share one clock. To set up the short baseline multipath model for evaluating the multipath error by using the single difference technology on short baseline and math model to find the relationship between the multipath error and the satellites ＇ elevation and azimuth, Obtained a satisfied result with the comparison of the real experiment data which conclude that the correctness and practicability of the short baseline multipath model.

关 键 词：多路径 共用时钟 多天线 短基线 

分 类 号：P228.4[天文地球—大地测量学与测量工程]