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Max-Consensus Over Fading Wireless Channels
The topic of this paper is achieving finite-time max-consensus in a
multi-agent system that communicates over a fading wireless channel and
exploits its interference property. This phenomenon corrupts the desired
information when data is transmitted synchronously. In fact, each transmitted
signal is attenuated by an unknown and time-varying factor (fading
coefficient), then, by interference, all such attenuated signals are summed up
at a receiver. Rather than combatting interference, we design a communication
system that exploits it. Our strategy yields a more efficient usage of wireless
resources compared to other algorithms. By simultaneously accessing this
communication system, each agent obtains a weighted average of the neighbouring
agents' information states. With this piece of information at hand and with a
switching consensus protocol employing broadcast authorisations for agents,
max-consensus can be achieved within a finite number of iterations