使用不同等级设备的时差载波相位和多普勒频移进行速度估计:从智能手机到专业接收器

IF 1.8 Q3 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE
Algorithms Pub Date : 2023-12-19 DOI:10.3390/a17010002
A. Angrisano, Giovanni Cappello, S. Gaglione, C. Gioia
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引用次数: 0

摘要

速度估计在一些应用中起着关键作用;例如,导航或移动测绘系统和全球导航卫星系统中的速度估计是目前实现可靠和精确速度的常用方法。根据全球导航卫星系统的测量结果获取速度主要采用两种方法,即多普勒观测和载波相位差时(即 TDCP)。在良性环境中,基于多普勒的速度估算可精确到几厘米/秒以内,而基于 TDCP 的速度估算可精确到几毫米/秒以内。另一方面,TDCP 技术更容易受到可用性不足和失误的影响。在这项工作中,使用三种不同等级的设备对上述两种方法进行了测试:高等级大地测量接收器、高灵敏度接收器和安装在智能手机上的全球导航卫星系统芯片。大地测量接收器的测量结果本质上更纯净,能提供精确的解决方案,而其余两种接收器的测量结果较差。智能手机全球导航卫星系统芯片的情况可能尤为关键,因为其配备的天线会使测量产生噪音,并在很大程度上受到误差的影响。为了评估单一系统的性能,对全球导航卫星系统进行了单独考虑。本研究进行的分析证实了之前对接收器等级和处理技术的考虑。此外,获得的结果突出表明,有必要采用 RAIM-FDE 等诊断方法进行测量,特别是对于低等级接收器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Velocity Estimation Using Time-Differenced Carrier Phase and Doppler Shift with Different Grades of Devices: From Smartphones to Professional Receivers
Velocity estimation has a key role in several applications; for instance, velocity estimation in navigation or in mobile mapping systems and GNSSs is currently a common way to achieve reliable and accurate velocity. Two approaches are mainly used to obtain velocity based on GNSS measurements, i.e., Doppler observations and carrier phases differenced in time (that is, TDCP). In a benign environment, Doppler-based velocity can be estimated accurately to within a few cm/s, while TDCP-based velocity can be estimated accurately to within a few mm/s. On the other hand, the TDCP technique is more prone to availability shortage and the presence of blunders. In this work, the two mentioned approaches are tested, using three devices of different grades: a high-grade geodetic receiver, a high-sensitivity receiver, and a GNSS chip mounted on a smartphone. The measurements of geodetic receivers are inherently cleaner, providing an accurate solution, while the remaining two receivers provide worse results. The case of smartphone GNSS chips can be particularly critical owing to the equipped antenna, which makes the measurements noisy and largely affected by blunders. The GNSSs are considered separately in order to assess the performance of the single systems. The analysis carried out in this research confirms the previous considerations about receiver grades and processing techniques. Additionally, the obtained results highlight the necessity of adopting a diagnostic approach to the measurements, such as RAIM-FDE, especially for low-grade receivers.
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来源期刊
Algorithms
Algorithms Mathematics-Numerical Analysis
CiteScore
4.10
自引率
4.30%
发文量
394
审稿时长
11 weeks
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