Pseudolites to Support Location Services in Smart Cities: Review and Prospects

IF 7 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

Smart Cities Pub Date : 2023-08-18 DOI:10.3390/smartcities6040096

Tong Liu, Jian Liu, J. Wang, Heng Zhang, Bing Zhang, Yongchao Ma, Mengfei Sun, Zhiping Lv, Guochang Xu

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引用次数: 0

Abstract

The location service is an important part of the smart city. A unified location service for outdoor and indoor/overground and underground activity will assist the construction of smart cities. However, with different coordinate systems and data formats, it is difficult to unify various positioning technologies on the same basis. Global navigation satellite system (GNSS)-based positioning is the only way to provide absolute location under the Earth-centered, Earth-fixed coordinate system (ECEF). Increasing indoor and underground human activity places significant demand on location-based services but no GNSS signals are available there. Fortunately, a type of satellite that is indoors, known as pseudolite, can transmit GNSS-like ranging signals. Users can obtain their position by receiving ranging signals and their resection without adding or switching other sensors when they go from outdoors to indoors. To complete the outreach of the GNSS indoors and underground to support the smart city, how to adapt the pseudolite design and unify coordinate frames for linking to the GNSS remain to be determined. In this regard, we provide an overview of the history of the research and application of pseudolites, the research progress from both the system side and the user side, and the plans for pseudolite-based location services in smart cities.

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伪卫星支持智能城市定位服务：回顾与展望

定位服务是智慧城市的重要组成部分。户外和室内/地上和地下活动的统一定位服务将有助于智慧城市的建设。然而，由于坐标系和数据格式不同，很难在同一基础上统一各种定位技术。基于全球导航卫星系统（GNSS）的定位是在以地球为中心、固定地球坐标系（ECEF）下提供绝对位置的唯一方法。越来越多的室内和地下人类活动对基于位置的服务提出了巨大需求，但那里没有全球导航卫星系统信号。幸运的是，一种被称为伪卫星的室内卫星可以传输类似GNSS的测距信号。当用户从室外进入室内时，无需添加或切换其他传感器，即可通过接收测距信号和切除来获取位置。为了完成全球导航卫星系统在室内和地下的推广，以支持智能城市，如何调整伪卫星设计并统一连接全球导航卫星卫星系统的坐标系仍有待确定。在这方面，我们概述了伪卫星的研究和应用历史，系统端和用户端的研究进展，以及智能城市中基于伪卫星的定位服务的计划。

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

Smart Cities Multiple-

CiteScore

11.20

自引率

6.20%

发文量

审稿时长

11 weeks

期刊介绍： Smart Cities (ISSN 2624-6511) provides an advanced forum for the dissemination of information on the science and technology of smart cities, publishing reviews, regular research papers (articles) and communications in all areas of research concerning smart cities. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible, with no restriction on the maximum length of the papers published so that all experimental results can be reproduced.