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GNSS/Cellular Hybrid Positioning System for Mobile Users in Urban Scenarios

机译:城市场景中移动用户的GNSS /蜂窝混合定位系统

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摘要

This paper proposes a hybrid scheme for user positioning in an urban scenario using both a Global Navigation Satellite System (GNSS) and a mobile cellular network. To maintain receiver complexity (and costs) at a minimum, the location scheme combines the time-difference-of-arrival (TDOA) technique measurements obtained from the cellular network with GNNS pseudorange measurements. The extended Kalman filter (EKF) algorithm is used as a data integration system over the time axis. Simulated results, which are obtained starting from real measurements, demonstrate that the use of cellular network data may provide increased location accuracy when the number of visible satellites is not adequate. In every case, the obtained accuracy is within the limits required by emergency location services, e.g., Enhanced 911 (E911).
机译:本文提出了一种使用全球导航卫星系统(GNSS)和移动蜂窝网络在城市场景中进行用户定位的混合方案。为了将接收机的复杂性(和成本)保持在最低水平,定位方案将从蜂窝网络获得的到达时间差(TDOA)技术测量结果与GNNS伪距测量结果结合在一起。扩展卡尔曼滤波器(EKF)算法用作时间轴上的数据集成系统。从实际测量开始获得的模拟结果表明,当可见卫星的数量不足时,使用蜂窝网络数据可能会提高定位精度。在每种情况下,获得的精度都在紧急位置服务(例如,增强型911(E911))所要求的范围内。

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