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Some remarks on GNSS integer ambiguity validation methods

机译:关于GNSS整数歧义验证方法的一些评论

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摘要

Ambiguity resolution is an indispensable step in fast and high precision Global Navigation Satellite System (GNSS) based positioning. In general, ambiguity resolution consists of three steps. The first step is to estimate the ambiguities using a least-squares estimation process, from which the so called 'float solution' or real valued solution is obtained. Then in the second step, the float solution is used to search for the integer ambiguities. Once integer ambiguities are resolved, the last step is to apply the integer ambiguities into the models so that fairly accurate fixed solution can be generated. Owing to the importance of the integer ambiguities, one indispensable procedure that needs to be implemented in the second step is integer ambiguity validation. Over the past decades, considerable work has been concentrated on this procedure and various approaches have been proposed, such as R-ratio test, F-ratio test, W-ratio test, integer aperture estimator, etc. However, their performances are controversial. Therefore, in this contribution, an overview of the existing ambiguity validation methods is firstly presented, and then some numerical analysis is carried out to evaluate their performances.
机译:模糊度解决是基于快速和高精度全球导航卫星系统(GNSS)的定位中必不可少的步骤。通常,歧义解决包括三个步骤。第一步是使用最小二乘估计过程估计模糊度,从中获得所谓的“浮点解”或实值解。然后在第二步中,使用float解决方案搜索整数模糊度。一旦解决了整数歧义,最后一步就是将整数歧义应用到模型中,以便可以生成相当准确的固定解。由于整数歧义的重要性,第二步中需要执行的一个必不可少的过程是整数歧义验证。在过去的几十年中,大量的工作集中在此过程上,并提出了各种方法,例如R比率测试,F比率测试,W比率测试,整数孔径估计器等。但是,它们的性能引起争议。因此,在此贡献中,首先介绍了现有歧义验证方法的概述,然后进行了一些数值分析以评估其性能。

著录项

  • 来源
    《Survey Review》 |2012年第326期|p.230-238|共9页
  • 作者

    T. Li; J. Wang;

  • 作者单位

    School of Surveying and Spatial Information Systems, University of New South Wales, NSW 2052, Sydney, Australia;

    School of Surveying and Spatial Information Systems, University of New South Wales, NSW 2052, Sydney, Australia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    GNSS; integer least-squares; ambiguity validation; integer aperture; ratio test;

    机译:GNSS;整数最小二乘法歧义验证;整数孔径比率测试;

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