Detection and Characterization Algorithm of Swept Continuous Wave Interference for Safe GBAS Operation

Chang Ho Kang, Sun Young Kim, Jeong Kwan Yang, Chan Gook Park

Abstract:	In this paper, an adaptive lattice IIR notch filter [1] is employed to track single-tone continuous wave and swept continuous wave interference signals, and an interference detection method is proposed. The performance of the interference detection algorithm is analyzed using software GPS and interference simulator data. Furthermore, this paper presents interference source characterization algorithm using multiple ground stations’ interference detection and power estimation results. The estimation results from each ground station include the type of interference (single-tone or swept), and estimated power. They will be combined to obtain more information of the interference sources including more precise frequency estimates, and the location of interference. The estimated interference powers from each ground station will be used to build weighting factors to estimate the type of the interference more precisely. If one ground station’s estimated power of the interference is greater than the power of others, the weight factor will be increased, and its result is used to decide the types of interference. The performance of interference detection and power estimation algorithm is simulated for scenarios of GPS signal in the presence of single-tone continuous wave interference and swept continuous wave interference.
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:	3465 - 3470
Cite this article:	Kang, Chang Ho, Kim, Sun Young, Yang, Jeong Kwan, Park, Chan Gook, "Detection and Characterization Algorithm of Swept Continuous Wave Interference for Safe GBAS Operation," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 3465-3470.
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