Aerial-Terrestrial Network NOMA for Cellular-Connected UAVs
نویسندگان
چکیده
Efficient connectivity in cellular-connected unmanned aerial vehicles (UAV)s is limited by scarcity of the radio spectrum and strong inter-cell interference (ICI). To address these issues, we propose an aerial-terrestrial network non-orthogonal multiple access (ATN-NOMA) scheme. In this proposed scheme, pair user (AU) terrestrial (TU) a NOMA setting to leverage their asymmetric channel gains rate demands downlink communications. ATN-NOMA, ICI issue at AU receiver further managed elevation-angle based association, equipping with adjustable beamwidth directional antenna, forming beamforming among coordinated base stations (BS)s. We then obtain optimal suboptimal power allocation so that TUs’ sum-rate maximized subject AU’s Quality-of-Service (QoS) requirement. The corresponding optimization problem non-convex which exploit structure apply successive convex approximation (SCA) solution. derive statistical properties, consequently enable us estimate aggregated ICI. cases where no interfering BSs have same elevation angle as BSs, approximate outage probability. compare probability ATN-NOMA existing schemes. Extensive simulation results show our scheme outperforms schemes 52-91% terms sum-rate, its analytical can be low order $10^{-17}$ . Furthermore, pairing TU multi-cell networks remains beneficial, effective mitigation
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ژورنال
عنوان ژورنال: IEEE Transactions on Vehicular Technology
سال: 2022
ISSN: ['0018-9545', '1939-9359']
DOI: https://doi.org/10.1109/tvt.2022.3165380