Unmanned Aerial Vehicle Assisted Cellular Communication

TL;DR

This paper models UAV-assisted cellular communication as a Rayleigh product-channel, deriving capacity bounds and analyzing trade-offs between power and antennas to enhance ergodic capacity.

Contribution

It introduces a closed-form lower-bound for ergodic capacity in UAV relay systems and analyzes power-antenna trade-offs for capacity improvements.

Findings

Derived a tight lower-bound of ergodic capacity.

Analyzed trade-offs between UAV transmit power and antennas.

Provided conditions for capacity gains with UAV relays.

Abstract

In this paper, we consider unmanned aerial vehicles (UAVs) assisted cellular communication system, where UAVs can be used as amplify-and-forward (AF) relays. The effective channel with UAV assisted communication can be modeled as a Rayleigh product-channel, and we derive a tight lower-bound of the ergodic capacity in closed-form. With the obtained lower-bound, trade-offs between the transmit power and the equipped number of antennas of the UAVs can be analyzed. Alternatively, for a giving setting of users and the base-transceiver station (BTS), the needed transmit power and number of antennas for the UAVs can be derived in order to have a higher ergodic capacity with the UAV assisted communication than that without it.