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Determination of receiver susceptibility to radio frequency interference from portable electronic devices

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2 Author(s)
Nguyen, T.X. ; NASA Langley Res. Center, Hampton, VA, USA ; Ely, J.J.

With the increasing pressures to allow wireless devices on aircraft the susceptibility of aircraft receivers to interference from portable electronic devices (PEDs) becomes an increasing concern. Many investigations were conducted in the past, with limited success, to quantify device emissions, path loss, and receiver interference susceptibility thresholds. This paper outlines the recent effort in determining the receiver susceptibility thresholds for ILS, VOR and GPS systems. The effort primarily consists of analysis of data available openly as reported in many RTCA and ICAO documents as well as manufacturers data on receiver sensitivity. Shortcomings with the susceptibility threshold data reported in the RTCA documents are presented, and an approach for an in-depth study is suggested. In addition, intermodulation products were observed and demonstrated in a laboratory experiment when multiple PEDs were in the proximity of each other. These intermodulation effects generate spurious frequencies that may fall within aircraft communication or navigation bands causing undesirable effects. Results from a preliminary analysis are presented that show possible harmful combinations of PEDs and the potentially affected aircraft bands.

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Digital Avionics Systems Conference, 2002. Proceedings. The 21st  (Volume:2 )

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