Modeling Distance Measurement Equipment (DME) Signals Interfering an Airborne GNSS Receiver

Alexander Steingass, Thanawat Thiasiriphet, Jaron Samson

Peer Reviewed

Abstract: This publication describes a model to generate distance measurement equipment (DME) signals as an interference source to airborne Global Satellite Navigation Systems (GNSS). Satellite navigation systems, use the lower L-band (Galileo: E5, 1164-1215-MHz; GPS: L5 1164-1189 MHz) for navigation services and are sharing the same frequency band with DME. Any GNSS receiver operating in the mentioned bands will have to deal with them as interference. Prior to this work, we only found models based on propagation estimation. No model existed which is based on real world measurements of DME signals. Thus, we carried out a flight measurement campaign at the European DME hotspot near Frankfurt (Main), Germany. From the measurement data, we have developed a measurement-based model which is much more accurate than the existing models since it accounts for the propagation, the DME transmission, and the GNSS receiver antenna effects. We provide this model to the community to allow a more realistic forecast of the DME–GNSS interference situation.
Published in: NAVIGATION: Journal of the Institute of Navigation, Volume 65, Number 2
Pages: 221 - 230
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