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Sensors 2015, 15(5), 10074-10087; doi:10.3390/s150510074

A New Indoor Positioning System Architecture Using GPS Signals

1,* , 1
,
1
and
1,2
1
The Hong Kong Polytechnic University, Hong Kong, China
2
China University of Petroleum (Huadong), Qingdao 266000, China
*
Author to whom correspondence should be addressed.
Academic Editors: Kourosh Khoshelham and Sisi Zlatanova
Received: 5 March 2015 / Revised: 21 April 2015 / Accepted: 23 April 2015 / Published: 29 April 2015
(This article belongs to the Special Issue Sensors for Indoor Mapping and Navigation)
View Full-Text   |   Download PDF [1355 KB, uploaded 29 April 2015]   |  

Abstract

The pseudolite system is a good alternative for indoor positioning systems due to its large coverage area and accurate positioning solution. However, for common Global Positioning System (GPS) receivers, the pseudolite system requires some modifications of the user terminals. To solve the problem, this paper proposes a new pseudolite-based indoor positioning system architecture. The main idea is to receive real-world GPS signals, repeat each satellite signal and transmit those using indoor transmitting antennas. The transmitted GPS-like signal can be processed (signal acquisition and tracking, navigation data decoding) by the general receiver and thus no hardware-level modification on the receiver is required. In addition, all Tx can be synchronized with each other since one single clock is used in Rx/Tx. The proposed system is simulated using a software GPS receiver. The simulation results show the indoor positioning system is able to provide high accurate horizontal positioning in both static and dynamic situations. View Full-Text
Keywords: GNSS; indoor positioning; pseudolite GNSS; indoor positioning; pseudolite
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Xu, R.; Chen, W.; Xu, Y.; Ji, S. A New Indoor Positioning System Architecture Using GPS Signals. Sensors 2015, 15, 10074-10087.

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