Probabilistic Positioning via Ray Tracing With Noisy Angle of Arrival Measurements

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-08-22 DOI:10.1109/LCOMM.2024.3448202

Vincent Corlay;Viet-Hoa Nguyen;Nicolas Gresset

引用次数: 0

Abstract

We consider the positioning problem in non line-of-sight (NLoS) situations, where several base stations (BS) try to locate a user equipment (UE) based on uplink angle of arrival (AoA) measurements and a digital twin of the environment. Ray launching in a Monte Carlo manner according to the AoA statistics enables to produce a map of points for each BS. These points represent the intersections of the rays with a xy plane at a given user equipment (UE) elevation. We propose to fit a parametric probability density function (pdf), such as a Gaussian mixture model (GMM), to each map of points. Multiplying the obtained pdfs for each BS enables to compute the position probability of the UE. This approach yields an algorithm robust to a reduced number of launched rays. Moreover, these parametric pdfs may be fitted and stored in an offline phase such that ray tracing can be avoided in the online phase. This significantly reduces the computational complexity of the positioning method.

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通过光线跟踪与噪声到达角测量进行概率定位

我们考虑的是非视距（NLoS）情况下的定位问题，在这种情况下，多个基站（BS）试图根据上行链路到达角（AoA）测量结果和环境的数字孪生图定位用户设备（UE）。根据 AoA 统计数据以蒙特卡洛方式发射光线，可为每个基站生成一张点地图。这些点代表在给定用户设备（UE）海拔高度上光线与 xy 平面的交点。我们建议对每个点图拟合一个参数概率密度函数（pdf），如高斯混合模型（GMM）。将获得的每个 BS 的 pdf 相乘，就能计算出 UE 的位置概率。这种方法产生的算法对发射射线数量的减少具有鲁棒性。此外，这些参数 pdf 可以在离线阶段进行拟合和存储，从而避免在在线阶段进行射线追踪。这大大降低了定位方法的计算复杂度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.