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Comparative Analysis of Interference Pathloss Coupling Patterns on B-737 VS. B757 AirplanesPortable wireless technology provides many benefits to modern day travelers. Over the years however, numerous reports have cited portable electronic devices (PEDs) as a possible cause of electromagnetic interference (EMI) to aircraft navigation and communication radio systems. PEDs may act as transmitters, both intentional and unintentional, and their signals may be detected by the various radio receiver antennas installed on the aircraft. Measurement of the radiated field coupling between passenger cabin locations and aircraft communication and navigation receivers, via their antennas is defined herein as interference path loss (IPL). IPL data is required for assessing the threat of PEDs to aircraft radios, and is very dependent upon airplane size, the interfering transmitter position within the airplane, and the location of the particular antenna for the aircraft system of concern. NASA Langley Research Center, Eagles Wings Inc., and United Airlines personnel performed extensive IPL measurements on several Boeing 737 airplanes. In the Spring of 2004, extensive IPL measurements were also taken on several Boeing 757 airplanes under a cooperative agreement between NASA Langley Research Center and Delta Airlines. The objective of this paper is to analyze IPL measurement data, to better understand the impact on coupling levels based on the different locations of the aircraft radio antennas on B-757 and B-737 airplanes, and to provide a basis for future fuzzy logic modeling of airplane IPL. This effort will build upon previous fuzzy modeling of IPL data for B-737 airplane data.
Document ID
20050238993
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Jafri, Madiha
(Old Dominion Univ. Norfolk, VA, United States)
Ely, Jay
(NASA Langley Research Center Hampton, VA, United States)
Vahala, Linda
(Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Aircraft Communications And Navigation
Funding Number(s)
OTHER: 23-079-30-10
Distribution Limits
Public
Copyright
Public Use Permitted.
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