Enhancing GNSS Acquisition by Combining Signals from Multiple Channels and Satellites

P. Axelrad, J. Donna, M. Mitchell

Abstract:	This paper describes the improvements to acquisition that can be gained by combining signals in terms of the theoretical reduction in C/N0 acquisition for given probability of false alarm and missed detection. The growth in number of channels available from each GNSS satellite and the number of satellite transmitters affords the opportunity for enhancements to the acquisition process. Existing techniques improve acquisition of weak signals through longer integration times and provision of satellite information from an aiding source. Examples of this collective detection approach are shown for live and simulated satellites over a range of input C/N0 values. Combining satellites and channels from a single satellite can improve the acquisition sensitivity for a given signal integration time or reduce the amount of time to acquire signals at a given input power level.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	2617 - 2628
Cite this article:	Axelrad, P., Donna, J., Mitchell, M., "Enhancing GNSS Acquisition by Combining Signals from Multiple Channels and Satellites," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 2617-2628.
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