Scaled Measurements of Timevariant GNSS Propagation Channels

Abstract

GNSSs (global navigation satellite systems) are an important worldwide standard for localisation methods. Prospective applications such as air transport with unmanned aircraft systems (UAS) in complex nonstatic urban environments will rely on GNSS signal integrity more than ever. Therefore, a basic approach for the analysis of timevariant GNSS propagation channels in a scaled measurement environment is introduced. A laboratory test bench is set up for the analysis of various generic GPS (Global Positioning System) channel configurations on a scale of 1:10. Time domain zero span measurements and a quasistatic channel characterisation are discussed. Corresponding measurement results are presented for different artificial interference scenarios. Finally, performance mitigation of a hardware GPS receiver due to the modulation of artificial navigation data with the measured channel properties is assessed.