Abstract
As many unmanned aerial vehicles(UAVs) are applied in various industries and services, concerns about the illegal use of UAVs are highly increasing. UAVs can be easily used for crime due to their ability of remote control and low probability of revealing the pilot's identity. Previously, detecting and removal have been major measures to counter illegal UAVs. However, in order to construct an effective defense system against illegal activities by UAVs, remote identification of the unique ID assigned to each UAV is necessity. Thus, frequency allocation is required in advance. In this paper, candidate frequencies below 1GHz for remote identification of UAVs are selected through investigation of technical regulations. In addition, coexistence between UAVs and existing wireless devices at the selected candidate frequencies are analyzed. Based on the minimum coupling loss, the separation distances between UAVs and the wireless devices are estimated.
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