Abstract: Directional antennas have been widely used in unmanned aerial vehicle (UAV) communications to improve the transmission efficiency. For a UAV mounted with directional antennas, its tilting ...

Abstract: As a crucial step for routing establishment in multi-hop mobile ad hoc networks (MANETs), topology discovery (TD) is extremely challenging when directional antennas are used. In this paper, ...

Radio signal dead zones can create a potentially dangerous situation for emergency responders, yet dozens of high-rises in ...

I crossed five states, dodged speed traps, and delivered Katz’s pastrami from New York to Michigan while it was still warm, ...

Santa Net is an annual December event where licensed amateur radio operators use RF and EchoLink technology to connect children with Santa Claus on the airwaves.

Imagine the terror if a celestial visitor was not only on a collision course with Earth but also sending a mysterious radio ...

An effective way to eliminate the problems caused by dead zones is to install a distributed antenna system (DAS)—technology ...