GNSS Multi-Interference Source Centroid Location Based on Clustering Centroid Convergence

At present, the GNSS interference mode has developed from single interference source to multi-interference source cooperative work, which brings new challenges to the positioning of interference source. Due to the mutual influence caused by multi-interference source working together, the traditional methods of locating interference source cannot accurately extract the characteristics of each interference signal, and thus cannot correctly locate. In this paper, an innovative multi-interference source centroid localization method based on clustering centroid convergence is proposed. In order to eliminate the influence of the receivers which are not interfered, the method selects GNSS receivers participating in the interference location by setting the threshold of carrier noise power density rate (C/N0). Then, the algorithm based on clustering centroid convergence is used to realize the accurate estimation of the number of interference sources and cluster the selected receivers. The algorithm is suitable for any clustering algorithm that needs to give the number of clusters in advance. Finally, the centroid weight based on C/N0 is applied to each clustering data set to locate multiple GNSS interference sources. Simulation results demonstrate that the method is accurate and reliable for GNSS multi-interference source location.