Name
Title | ||
|---|---|---|
On Ergodic Capacity and Optimal Number of Tiers in UAV-Assisted Communication Systems. |
Abstract | ||
|---|---|---|
In this paper, we consider unmanned aerial vehicle (UAV) assisted communication systems, where a number of UAVs are utilized as multi-tier relays between a number of users and a base-transceiver station (BTS). We model the wireless propagation channel between the users and the BTS as a Rayleigh product channel, which is a product of a series of independent and identically distributed (i.i.d.) Rayleigh multi-input multi-output channels. We put a special interest in optimizing the number of tiers in such UAV-assisted systems for a given total number of UAVs through maximizing the ergodic capacity. To achieve this goal, in the first part, we derive a lower-bound in a closed form for the ergodic capacity, which is shown to be asymptotically tight. In the second part, we analyze the optimal number of UAV-tiers with the derived bound, and propose a low-complexity solution that significantly reduces the search-size and yields near-optimal performance. Further, asymptotic properties both for the ergodic capacity and the solution for optimal number of tiers are extensively analyzed. |
Year | DOI | Venue |
|---|---|---|
2018 | 10.1109/tvt.2019.2893593 | IEEE Transactions on Vehicular Technology |
Keywords | Field | DocType |
MIMO communication,Signal to noise ratio,Relays,Unmanned aerial vehicles,Optimization,Cellular networks | Rayleigh scattering,Mathematical optimization,Wireless,Ergodic theory,Communications system,Communication channel,MIMO,Independent and identically distributed random variables,Mathematics | Journal |
Volume | Issue | ISSN |
abs/1807.02151 | 3 | 0018-9545 |
Citations | PageRank | References |
1 | 0.35 | 0 |
Authors | ||
1 | ||