欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
多径干扰是影响GNSS定位精度的主要误差源之一,从多径信号特征入手,分析了多径干扰对载波环和码环的影响,并研究了矢量跟踪环路（VTL）对多径的抑制性能。通过对比分析VTL和标量跟踪环路（STL）的环路结构,建立了线性化的系统模型,推导了码相位测量误差对VTL的影响。在VTL中,未受多径影响的通道辅助受干扰的通道,削弱多径带来的定位误差。通过仿真对比分析了一个和多个通道受多径干扰时,多径对VTL和STL的影响,结果表明,受多径干扰的通道数越少,VTL相对于STL抑制多径性能越好,当所有通道都受多径干扰时,VTL定位精度不差于STL。
英文摘要：
Multipath interference was one of the main error in GNSS. From the multipath signal characteristics, analysed the effect of multipath interference on carrier tracking loop and code tracking loop. And the anti-multipath performance with vector tracking loop（VTL） was studied. By analyzing the structure of VTL and scalar tracking loop（STL）, a linear system model was established, and the effect of code tracking error on VTL was deduced. In VTL, the affected channels were assisted by other channels,weakening the multipath positioning errors. One and more affected channels by multipath had been established. Under these scenes, the simulations had been made to compare the positioning errors between STL and VTL. The experiments proved that, relative to the STL, the fewer affected channels, the better the anti-multipath performance with VTL. And when all channels are affected by multipath, the positioning accuracy of VTL is not worse than the STL.
同期刊论文项目
同项目期刊论文
期刊信息
位置：