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Earth-surface Multipath Detection And Error Modeling For Aircraft Gps Receivers

机译：飞机Gps接收机的地表​​多径检测和误差建模

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摘要

For aircraft precision approach operations, Earth-surface multipath observed by an aircraft GPS antenna degrades the accuracy of pseudorange measurement. Of particular concern are stabilized approaches over water where the water reflection of the GPS signal could generate sustained multipath error. A novel multi-path detection method is introduced in this work. It provides accurate estimates of multipath strength and fading frequency using a software-defined radio GPS receiver and radio frequency data collected from a top-mounted antenna. Combined with analysis of flight-test data collected from both the top-mounted antenna and a bottom-mounted antenna, the new method allows for a realistic model of the Earth-surface multipath environment. Narrow-band and wide-band airborne receivers are simulated, and their responses to Earth-surface multipath are evaluated. The two receivers are found to have different code phase error signatures in the same multipath environment. Under different conditions, both receivers can experience smoothed pseudorange bias of up to 0.3 m.
机译：对于飞机精密进近操作，飞机GPS天线观测到的地表多径会降低伪距测量的准确性。特别令人关注的是在水上的稳定方法，其中GPS信号的水反射会产生持续的多径误差。本文介绍了一种新颖的多径检测方法。它使用软件定义的无线电GPS接收器和从顶部安装的天线收集的无线电频率数据，提供对多径强度和衰落频率的准确估计。结合对从顶部安装的天线和底部安装的天线收集的飞行测试数据进行分析，该新方法可为地球表面多径环境提供逼真的模型。模拟了窄带和宽带机载接收机，并评估了它们对地表多径的响应。发现两个接收器在同一多径环境中具有不同的代码相位错误签名。在不同的条件下，两个接收器都可以承受高达0.3 m的平滑伪距偏差。

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  • 来源
    《Navigation》 |2009年第1期|45-56|共12页
  • 作者

    ZHEN ZHU; FRANK VAN GRAAS;

  • 作者单位

    Avionics Engineering Center, Ohio University, Athens, OH 45701;

    Avionics Engineering Center, Ohio University, Athens, OH 45701;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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