Combined Parallel and Sequential Detection for Improved GPS Acquisition

Stephen F. Rounds and Charles Norman

Abstract:	ABSTRACT The requirements for fast acquisition in weak signal and high jamming environments has led the GPS industry to massively parallel architectures for both commercial and military applications. This architecture allows searches of large regions of the time-frequency uncertainty domain in a single dwell of the acquisition engine. However, since all elements of the parallel architecture are treated equally, it has not been possible to realize the advantages of a sequential detector in minimizing the dwell time as a function of the dynamically observed signal and noise environment. This paper describes an acquisition process that retains the wideband search capabilities of the parallel architecture, but also includes many of the advantages of a sequential detector. Insight is also found from the underlying mathematics which points to the requirements of re-optimizing acquisition algorithms for massively parallel architectures.
Published in:	Proceedings of the IAIN World Congress and the 56th Annual Meeting of The Institute of Navigation (2000) June 26 - 28, 2000 The Catamaran Resort Hotel San Diego, CA
Pages:	368 - 372
Cite this article:	Rounds, Stephen F., Norman, Charles, "Combined Parallel and Sequential Detection for Improved GPS Acquisition," Proceedings of the IAIN World Congress and the 56th Annual Meeting of The Institute of Navigation (2000), San Diego, CA, June 2000, pp. 368-372.
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