Issues and Approaches for Navigation Using Signals of Opportunity

John F. Raquet, Mikel M. Miller, and Thao Q. Nguyen

Abstract:	There are many situations in which GPS is either unable to provide the desired level of accuracy or is unavailable, particular in urban or indoor environments. One alternative to GPS is to navigate using signals of opportunity (SoOP)—signals that are intended for purposes other than navigation. This paper describes the benefits and drawbacks of navigation using SoOP and identifies typical SoOP system configurations. Three different types of SoOP measurements are described, including ranging through signal strength, angle of arrival, and time-difference of arrival (TDOA) measurements. Positioning algorithms, ambiguity resolution issues, and measurement quality and geometry are also addressed.
Published in:	Proceedings of the 2007 National Technical Meeting of The Institute of Navigation January 22 - 24, 2007 The Catamaran Resort Hotel San Diego, CA
Pages:	1073 - 1080
Cite this article:	Raquet, John F., Miller, Mikel M., Nguyen, Thao Q., "Issues and Approaches for Navigation Using Signals of Opportunity," Proceedings of the 2007 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2007, pp. 1073-1080.
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