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WiFi Assisted GPS for Extended Location Services

  • Saverio Cacopardi
  • Mauro Femminella
  • Gianluca Reali
  • Andrea Sedini
  • Fortunato Palella
  • Maurizio Turina
  • Andrea Vignoli
  • Giuseppe Confessore
  • Emanuela Scacchi
  • Angela Maria Saraceno
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 43)

Abstract

This paper shows a lightweight technique for extending the positioning capabilities of a global navigation satellite system to areas characterized by reduced satellite visibility. This technique includes the presence of a WiFi coverage, used to implement the virtual satellite concept. In particular we assume that a customer terminal can receive both Global Positioning System (GPS) signals and WiFi beacons broadcasted by an access point (AP). We show that if such beacons include the geo-referenced position of the relevant AP, the suitable usage of this information allows determining the GPS receiver position even if only three satellites are visible. Experimental results show that the achievable performance are similar to that obtainable by a plain GPS receiver using four visible satellites.

Keywords

WiFi GPS hybrid positioning performance analysis 

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Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2010

Authors and Affiliations

  • Saverio Cacopardi
    • 1
  • Mauro Femminella
    • 1
  • Gianluca Reali
    • 1
  • Andrea Sedini
    • 1
  • Fortunato Palella
    • 2
  • Maurizio Turina
    • 2
  • Andrea Vignoli
    • 2
  • Giuseppe Confessore
    • 2
  • Emanuela Scacchi
    • 2
  • Angela Maria Saraceno
    • 2
  1. 1.Department of Electronic and Information EngineeringUniversity of PerugiaPerugiaItaly
  2. 2.Consorzio Technos Reat AerospaceRietiItaly

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