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Performance and Integrity Analysis of the Vector Tracking Architecture of GNSS Receivers.

机译：GNSS接收机矢量跟踪体系结构的性能和完整性分析。

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摘要

Frequent loss or attenuation of signals in urban areas and integrity (or reliability of system performance) are two principal challenges facing the Global Navigation Satellite Systems or GNSS today. They are of critical importance especially to safety or liability-critical applications where system malfunction can cause safety problems or has legal/economic consequences. To deal with the problem of integrity, algorithms called integrity monitors have been developed and fielded. These monitors are designed to raise an alarm when situations resulting in misleading information are identified. However, they do not enhance the ability of a GNSS receiver to track weak signals. Among several approaches proposed to deal with the problem of frequent signal outage, an advanced GNSS receiver architecture called vector tracking loops has attracted much attention in recent years.;While there is an extensive body of knowledge that documents vector tracking's superiority to deal with weak signals, prior work on vector loop integrity monitoring is scant. Systematic designs of a vector loop-integrity monitoring scheme can find use in above-mentioned applications that are inherently vulnerable to frequent signal loss or attenuation. Developing such a system, however, warrants a thorough understanding of the workings of the vector architecture as the open literature provides very few preliminary studies in this regard.;To this end, the first aspect of this research thoroughly explains the internal operations of the vector architecture. It recasts the existing complex vector architecture equations into parametric models that are mathematically tractable. An in-depth theoretical analysis of these models reveals that inter-satellite aiding is the key to vector tracking's superiority.;The second aspect of this research performs integrity studies of the vector loops. Simulation results from the previous analysis show that inter-satellite aiding allows easy propagation of errors (and faults) among satellite loops in vector tracking mode. Hence, the basic single fault requirement of the traditional Receiver Autonomous Integrity Monitoring or RAIM is violated with the pseudorange measurements of the vector architecture. This work develops a vector loop RAIM scheme that addresses above limitation. The designed vector loop RAIM algorithm is validated via a high fidelity simulation of an aircraft making an instrument approach.
机译：市区中信号的频繁丢失或衰减以及完整性（或系统性能的可靠性）是当今全球导航卫星系统或GNSS面临的两个主要挑战。它们对于系统故障可能会导致安全问题或具有法律/经济后果的安全性或要求严格的应用尤其重要。为了解决完整性问题，已经开发并提出了称为完整性监视器的算法。这些监视器旨在在识别出导致误导性信息的情况时发出警报。但是，它们不能增强GNSS接收机跟踪微弱信号的能力。在解决信号频繁中断问题的几种方法中，近年来，一种称为矢量跟踪环路的先进GNSS接收器体系结构引起了人们的广泛关注。虽然有大量知识证明矢量跟踪在处理微弱信号方面的优越性，关于矢量循环完整性监控的先前工作很少。向量环路完整性监控方案的系统设计可以在上述固有的易受频繁信号丢失或衰减影响的应用中使用。然而，开发这样的系统需要对向量体系结构的工作方式有一个透彻的了解，因为开放文献在这方面很少提供初步研究。为此，本研究的第一方面彻底解释了向量的内部操作建筑。它将现有的复杂矢量体系结构方程式重铸为数学上易处理的参数模型。对这些模型的深入理论分析表明，卫星间辅助是矢量跟踪优越性的关键。本研究的第二个方面进行矢量环的完整性研究。先前分析的仿真结果表明，卫星间辅助可以在矢量跟踪模式下轻松地在卫星环路之间传播错误（和故障）。因此，矢量架构的伪距测量违反了传统接收机自主完整性监控或RAIM的基本单故障要求。这项工作开发了解决上述限制的矢量循环RAIM方案。通过对采用仪器进近的飞机进行高保真度仿真，对设计的矢量环RAIM算法进行了验证。

著录项

  • 作者

    Bhattacharyya, Susmita.;

  • 作者单位

    University of Minnesota.;

  • 授予单位 University of Minnesota.;
  • 学科 Engineering Aerospace.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 251 p.
  • 总页数 251
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:42:29

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