Implementation of Deeply Integrated GPS/Low-Cost IMU for Reacquisition and Tracking of Low CNR GPS Signals

Andrey Soloviev, Frank van Graas, and Sanjeev Gunawardena

Abstract:	A deeply integrated GPS/IMU system is developed to acquire and continuously track low Carrier-to-Noise Ratio (CNR) GPS signals, while maintaining carrier tracking performance at the mm-level. Reacquisition and tracking are demonstrated for 15 dB-Hz GPS signals without receivers for a number of applications (e.g. indoor applications or navigation in the presence of wideband interference). The deeply integrated GPS/IMU employs inertial aiding of the GPS signal integration to significantly increase the integration time interval as compared to conventional unaided receivers. As a result, requiring knowledge of navigation data bits. Initial, lowdynamic test results demonstrate the feasibility of the deeply integrated GPS/IMU system.
Published in:	Proceedings of the 2004 National Technical Meeting of The Institute of Navigation January 26 - 28, 2004 The Catamaran Resort Hotel San Diego, CA
Pages:	923 - 935
Cite this article:	Soloviev, Andrey, van Graas, Frank, Gunawardena, Sanjeev, "Implementation of Deeply Integrated GPS/Low-Cost IMU for Reacquisition and Tracking of Low CNR GPS Signals," Proceedings of the 2004 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2004, pp. 923-935.
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