Multipath Mitigation of GPS Carrier Phase Measurement Using Unscented Kalman Filter

Eunsung Lee, Sebum Chun, Young Jae Lee, Teasam Kang and Gyu-In Jee

Abstract:	This paper describes the development of a method of multipath mitigation of GPS (Global Positioning System) carrier phase measurement. Multipath is a major source of error in high precision GPS static and kinematic differential positioning. Multipath accounts for most of the total error budget in carrier phase measurements in an attitude determination system. In order to estimate and remove carrier phase measurement multipath, an array GPS antenna system has been used. The known geometry between the antennas is the useful information to estimate multipath parameters. The extended Kalman filter (EKF) is a popular estimator, which uses a combination of the available information from an array antenna system to estimate various multipath parameters. The unscented Kalman filter (UKF) is newly focused from many areas to overcome some of the limitations of the extended Kalman filter. The UKF is applied for estimating multipath parameters in this paper.
Published in:	Proceedings of the 2005 National Technical Meeting of The Institute of Navigation January 24 - 26, 2005 The Catamaran Resort Hotel San Diego, CA
Pages:	454 - 461
Cite this article:	Lee, Eunsung, Chun, Sebum, Lee, Young Jae, Kang, Teasam, Jee, Gyu-In, "Multipath Mitigation of GPS Carrier Phase Measurement Using Unscented Kalman Filter," Proceedings of the 2005 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2005, pp. 454-461.
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