Interference Impact of Wireless Avionics Intra-Communication Systems onto Aeronautical Radio Altimeters

Conference: SCC 2015 - 10th International ITG Conference on Systems, Communications and Coding
02/02/2015 - 02/05/2015 at Hamburg, Germany

Proceedings: ITG-Fb 254: 10th International ITG Conference on Systems, Communications and Coding (SCC 2015)

Pages: 6Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Authors:
Meyerhoff, Thomas; Schwark, Uwe (Airbus Operations GmbH, Kreetslag 10, 21129 Hamburg, Germany)
Faerber, Henning (Hamburg University of Technology, Schwarzenbergstr. 93, 21073 Hamburg, Germany)

Abstract:
In this paper an assessment concerning the potential impact of interference caused by transmissions of wireless avionics intra-communication systems onto aeronautical radio altimeter operating co-frequency is presented. The radio altimeter model utilized for the assessment accounts for realistic scattering and antenna characteristics to describe echo signals returned by the Earth surface. It includes a detailed description of the signal processing and detection stages allowing for a comprehensive analysis of the interference impact. The interference of wireless avionics intra-communication transmissions is modeled by offset quadrature phase-shift keying modulated signals which are added to radio altimeter receive antenna output signal. The assessment covers a broad range of potential interference scenarios. It includes a detailed analysis of the spectral characteristics of wireless avionics intra-communication signals observed in the radio altimeter detection stage and an evaluation of their impact onto the altitude detection reliability.