Investigating the Impact of Dynamic Scatterers on Transmission Channels - A Case Study of the Propeller Aircraft Airbus A400M in the context of the Instrument Landing System

Abstract

Multipath propagation can lead to signal disturbances and cause risks in the operation of critical applications such as flight navigation systems. Hence, in addition to an effective system design, an important task is to ensure a sufficiant level of system integrity. This e.g. requires to identify possible sources of interference. The presented work investigates the impact of non-static scatterers on transmission channels. In particular, the focus is on periodic interferences caused by fast rotating propellers of the military aircraft Airbus A400M on the localizer of the instrument landing system (ILS). Measurement results are presented for a generic triangular setup and a realistic ILS scenario with an aircraft on various positions around the runway.