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Cumulative interference to aircraft radios from multiple portable electronic devices

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

Cumulative interference effects from portable electronic devices (PEDs) located inside a passenger cabin are conservatively estimated for aircraft radio receivers. PEDs' emission powers in an aircraft radio frequency band are first scaled according to their locations' interference path loss (IPL) values, and the results are summed to determine the total interference power. The multiple-equipment-factor (MEF) is determined by normalizing the result against the worst case contribution from a single device. Conservative assumptions were made and MEF calculations were performed for Boeing 737's Localizer, Glide-slope, Traffic Collision Avoidance System, and Very High Frequency Communication radio systems where full-aircraft IPL data were available. The results show MEF for the systems to vary between 10 and 14 dB. The same process was also used on the more popular window/door IPL data, and the comparison show the multiple-equipment-factor results came within one decibel (dB) of each other.

Published in:

Digital Avionics Systems Conference, 2005. DASC 2005. The 24th  (Volume:2 )

Date of Conference:

30 Oct.-3 Nov. 2005