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

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

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.