Abstract | ||
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To provide a reliable wireless uplink for users in a given ground area, one can deploy Unmanned Aerial Vehicles (UAVs) as base stations (BSs). In another application, one can use UAVs to collect data from sensors on the ground. For a power-efficient and scalable deployment of such flying BSs, directional antennas can be utilized to efficiently cover arbitrary 2-D ground areas. We consider a large-scale wireless path-loss model with a realistic angle-dependent radiation pattern for the directional antennas. Based on such a model, we determine the optimal 3-D deployment of N UAVs to minimize the average transmit-power consumption of the users in a given target area. The users are assumed to have identical transmitters with ideal omnidirectional antennas and the UAVs have identical directional antennas with given half-power beamwidth (HPBW) and symmetric radiation pattern along the vertical axis. For uniformly distributed ground users, we show that the UAVs have to share a common flight height in an optimal power-efficient deployment, by simulations. We also derive in closed-form the asymptotic optimal common flight height of N UAVs in terms of the area size, data-rate, bandwidth, HPBW, and path-loss exponent. |
Year | DOI | Venue |
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2020 | 10.1109/TCOMM.2020.2992521 | IEEE Transactions on Communications |
Keywords | DocType | Volume |
Node deployment,UAVs,directional antennas,power optimization | Journal | 68 |
Issue | ISSN | Citations |
8 | 0090-6778 | 3 |
PageRank | References | Authors |
0.39 | 0 | 3 |
Name | Order | Citations | PageRank |
---|---|---|---|
Jun Guo | 1 | 1579 | 137.24 |
Philipp Walk | 2 | 40 | 7.77 |
Hamid Jafarkhani | 3 | 7037 | 695.30 |