Performance Comparison of Deep Integration and Tight Coupling

Matthew Lashley and David M. Bevly

Abstract:	Abstract—This paper presents a comparative analysis of tight coupling and deep integration. Three deeply integrated and two tightly coupled architectures are analyzed. The analysis of the different architectures is performed using the same grade inertial measurement units, satellite constellations, and GPS signal processing techniques (i.e. identical discriminators, coherent integration times, and C/N0 ratio estimators). Three aspects of the architectures are studied. The first is the general performance improvement offered by deep integration over tight coupling. The second aspect is the effect of using a federated filtering architecture instead of using a single, centralized filter. The third aspect analyzed is the performance of the algorithms when operated with and without vector tracking. The advantages in performance offered by the different aspects of the various architectures are analyzed and quantized. Index Terms—GPS; deep integration; ultra-tight coupling; tight coupling; vector tracking; vector delay lock loop; vector frequency lock loop;
Published in:	Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011) September 20 - 23, 2011 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	2090 - 2104
Cite this article:	Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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