Optimization and Performance of Multi-Criteria Collaborative Integrity Control in Degraded GNSS Environments

This study aims to establish the performance of a multi-criteria collaborative integrity control in the presence of GNSS spoofing. The plurality of criteria means that multiple sources of information are used simultaneously to determine whether or not the position of the receivers is degraded by a GNSS attack. By using the residuals of the PVT (position, velocity, time) estimation and the C/N₀ ratio (expressed in dB-Hz), a robust integrity control can be obtained with all the data used. The main strength of this integrity control lies in the collaboration between receivers through comparison and sharing of information. Additionally, it only adds a software layer to the system, and no additional hardware is required for this method. It works equally well with a limited number of receivers as it does with a large number of receivers.