A new simple Unmanned Aerial Vehicle doppler effect RF reducing technique

The purpose of this paper is to present a solution to reduce the Doppler effect in wireless communication systems. As distance increases, pathloss increases too and the signal to noise ratio decreases. A major problem that affects the quality of the link is the horizon. A solution to improve signal quality is to use an Unmanned Aerial Vehicle (UAV) relaying far mobile stations to the base station. However, because of UAV's speed, Doppler frequency shift decreases the signal to noise ratio and cannot be supported by the base station for the values that are higher than the measured limit. The simple solution explained in this paper reduces dramatically the Doppler effect and makes possible the use of UAVs, as a repeater, to extend the communication even at high speed.

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