Classification Electromagnetic Interference Impact of VOR, ILS, and GBAS Radio Navigation Systems Operating in the VHF Band

Abstract

The active use of radio systems in the VHF spectrum and the overloading of this spectrum have made the presence of electromagnetic interference noticeable especially for systems in which proper operation is critically important. Radio systems equipment intended for aeronautical service groups is undoubtedly one of them (VOR, ILS, GBAS). Today, specialists’ main challenge is reducing these interferences, several recommendations have been issued both by ICAO and ITU.  In this study, we investigate possible causes of these errors Such as intermodulation, wireless attack, and anomalous wave propagation.