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The measurements of air-to-air channel at C-band for coexistence among multiple unmanned aircraft (UA) systems are presented. The measurement campaign was performed to clarify the channel characteristic of the air-to-air radio propagation between small UAs. This paper presents a measurement result of our campaign on radio channel characteristics in C-band held in Japan in March 2016. The received...
This paper describes the radio propagation characteristics in urban environment for a fixed-wing unmanned aircraft (UA) system. In the Great East-Japan Earthquake in 2011, the even the latest mobile phones became almost unavailable due to the breakdown of base stations, electricity outage, and traffic congestion. In addition, many areas in mountains or islands were isolated due to the damage of roads,...
This paper presents a performance evaluation on path diversity introduced in a wireless network established by unmanned aerial vehicles or unmanned aircrafts (UAs). One of usage scenarios of the wireless network established by UAs is establishment of a temporal communications instead of disrupted terrestrial networks due to a massive disaster. In order to evaluate system performance based on this...
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