Model-Based Multipath Estimation Technique for GPS Receivers

Deok Won Lim, Moon Beom Heo, Heon Ho Choi, Sang Jeong Lee

Abstract:	Multipath reception remains a dominant source of ranging errors in Global Navigation Satellite Systems (GNSS). This phenomenon is generally considered undesirable in the context of GNSS, as multipath reception can significantly distort the shape of the correlation function. In this study, a model distortion of a correlation function is formulated, and a model-based multipath estimation (MBME) technique for GPS L1/L5 receivers is proposed in order to estimate parameters of multipath signals, such as amplitude and delay. The proposed MBME technique does not require any hardware modifications, and it can estimate parameters for both short- and long-delay multipath reception. This technique would prove to be very effective for short-delay multipath estimation, particularly where an L5 signal is available. Finally, we describe the results of a simulation to confirm the feasibility of the proposed technique.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	3017 - 3026
Cite this article:	Lim, Deok Won, Heo, Moon Beom, Choi, Heon Ho, Lee, Sang Jeong, "Model-Based Multipath Estimation Technique for GPS Receivers," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 3017-3026.
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