Combining GPS And Cell Phone Handsets - The Intelligent Approach

A. R. Pratt

Abstract:	The urgent attention given to satisfying the E911 technical requirement has fostered the prospect of combining GPS receivers with GSM and CDMA technology. This paper discusses the challenges in the GPS receiver architecture imposed by the new constraint of a co-located telephone link. Potential for development of combined receivers arises from the simultaneous need for low cost, small size and low power consumption. The requirements suggest dual use of some receiver resources such as clock and synthesiser, and the location processor. The paper demonstrates that a combined synthesiser is possible but with new frequency plans which cohabit with GSM and/or CDMA architectures. Possible solutions are shown exhibiting increased complexity in both the rf and digital processing areas. Combined use of processor resources is also practical but with challenges in the process scheduling. The paper indicates those areas in which, at slight increase in complexity, a low latency GPS process can be made to co-exist without performance loss. This involves the use of non-uniform sampling and sample interpolation.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	529 - 536
Cite this article:	Pratt, A. R., "Combining GPS And Cell Phone Handsets - The Intelligent Approach," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 529-536.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In