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- W2983753609 abstract "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. 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." @default.
- W2983753609 created "2019-11-22" @default.
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- W2983753609 date "2019-11-18" @default.
- W2983753609 modified "2023-09-26" @default.
- W2983753609 title "Optimal deployments of UAVs with directional antennas for a power-efficient coverage" @default.
- W2983753609 doi "https://doi.org/10.48550/arxiv.1911.07463" @default.
- W2983753609 hasPublicationYear "2019" @default.
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