Compass Assisted GPS for LBS Applications

Mark Amundson

Abstract:	Location Based Services (LBS) has become the key feature for wireless phones, and its wheeled vehicle equivalent, Telematics. The essential elements to LBS have been a two-way wireless data communications link plus navigation data inputs to permit a screened flow of information from LBS data servers. Today, most LBS system designers consider the fusion of Global Position Satellite (GPS) receivers and cellular phone services the starting point. Compassing is another navigation aid that LBS can use along with wireless services and GPS data. Compasses rely on sensing the earth’s magnetic field, and supply a compass heading angle based on a north heading reference. By assigning a wireless phone or telematics receiver a forward direction for pointing, the resulting pointing/heading angle is essential in LBS applications to indicate to the data server what you are pointing to. This paper is intended to show that magnetic compassing is a “must have” feature for quality Location Based Services functionality.
Published in:	Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005) September 13 - 16, 2005 Long Beach Convention Center Long Beach, CA
Pages:	2965 - 2968
Cite this article:	Amundson, Mark, "Compass Assisted GPS for LBS Applications," Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005), Long Beach, CA, September 2005, pp. 2965-2968.
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