A new indoor positioning system architecture using gps signals

Rui Xu, Wu Chen, Ying Xu, Shengyue Ji

Research output: Journal article publicationJournal articleAcademic researchpeer-review

72 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)10074-10087
Number of pages14
JournalSensors (Switzerland)
Issue number5
Publication statusPublished - 1 Jan 2015


  • GNSS
  • Indoor positioning
  • Pseudolite

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering


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