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GNSS Shadow Matching: Improving Urban Positioning Accuracy Using a 3D City Model with Optimized Visibility Scoring Scheme

机译:GNSS阴影匹配:使用具有最佳可见度评分方案的3D城市模型来提高城市定位精度

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摘要

Global navigation satellite system (GNSS) positioning is widely used in land vehicle and pedestrian navigation systems. Nevertheless, in urban canyons GNSS remains inaccurate due to building blockages and reflections, especially in the cross-street direction. Shadow matching is a new technique, recently proposed for improving the cross-street positioning accuracy using a 3D model of the nearby buildings. This paper presents a number of advances in the shadow-matching algorithm. First, a positioning algorithm has been developed, interpolating between the top-scoring candidate positions. Furthermore, a new scoring scheme has been developed that accounts for signal diffraction and reflection. Finally, the efficiency of the process used to generate the grid of building boundaries used for predicting satellite visibility has been improved. Real-world GNSS data has been collected at 22 different locations in central London to provide the first comprehensive and statistical performance analysis of shadow matching.
机译:全球导航卫星系统(GNSS)定位广泛用于陆地车辆和行人导航系统。但是,在城市峡谷中,由于建筑物的阻塞和反射,尤其是在横街方向,GNSS仍然不准确。阴影匹配是一项新技术,最近提出了一种使用附近建筑物的3D模型来提高跨街定位精度的技术。本文介绍了阴影匹配算法的许多进展。首先,开发了一种定位算法,可以在得分最高的候选位置之间进行插值。此外,已经开发了一种新的计分方案,该方案考虑了信号的衍射和反射。最后,用于生成用于预测卫星能见度的建筑物边界网格的过程的效率得到了提高。现实世界的GNSS数据已在伦敦市中心的22个不同位置收集,以提供阴影匹配的首次综合和统计性能分析。

著录项

  • 来源
    《Navigation》 |2013年第3期|195-207|共13页
  • 作者单位

    University College London, London, United Kingdom;

    University College London, London, United Kingdom;

    University College London, London, United Kingdom;

  • 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
  • 关键词

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