358 research outputs found
MmWave MU-MIMO for Aerial Networks
Millimeter wave offers high bandwidth for air-to-air (A2A) communication. In
this paper, we evaluate the rate performance of a multiuser MIMO (MU-MIMO)
configuration where several aircraft communicate with a central hub. We
consider a hybrid subarray architecture, single path channels, and realistic
atmospheric attenuation effects. We propose a mathematical framework for the
analysis of millimeter wave (mmWave) MU-MIMO networks. Via Monte Carlo
simulation, we demonstrate that mmWave is a promising technology for delivering
gigabit connectivity in next-generation aerial networks.Comment: 5 pages, 4 figures, accepted at ISWCS Special Session 7:
Vehicle-to-Everything (V2X) Communications. Small correction to equation (9)
that I noticed after publication. Code available at:
https://github.com/travisCuvelier/mmWaveAerialNetwork
Coexistence of UAVs and Terrestrial Users in Millimeter-Wave Urban Networks
5G millimeter-wave (mmWave) cellular networks are in the early phase of
commercial deployments and present a unique opportunity for robust,
high-data-rate communication to unmanned aerial vehicles (UAVs). A fundamental
question is whether and how mmWave networks designed for terrestrial users
should be modified to serve UAVs. The paper invokes realistic cell layouts,
antenna patterns, and channel models trained from extensive ray tracing data to
assess the performance of various network alternatives. Importantly, the study
considers the addition of dedicated uptilted rooftop-mounted cells for aerial
coverage, as well as novel spectrum sharing modes between terrestrial and
aerial network operators. The effect of power control and of multiuser
multiple-input multiple-output are also studied
Multiple Access in Aerial Networks: From Orthogonal and Non-Orthogonal to Rate-Splitting
Recently, interest on the utilization of unmanned aerial vehicles (UAVs) has
aroused. Specifically, UAVs can be used in cellular networks as aerial users
for delivery, surveillance, rescue search, or as an aerial base station (aBS)
for communication with ground users in remote uncovered areas or in dense
environments requiring prompt high capacity. Aiming to satisfy the high
requirements of wireless aerial networks, several multiple access techniques
have been investigated. In particular, space-division multiple access(SDMA) and
power-domain non-orthogonal multiple access (NOMA) present promising
multiplexing gains for aerial downlink and uplink. Nevertheless, these gains
are limited as they depend on the conditions of the environment. Hence, a
generalized scheme has been recently proposed, called rate-splitting multiple
access (RSMA), which is capable of achieving better spectral efficiency gains
compared to SDMA and NOMA. In this paper, we present a comprehensive survey of
key multiple access technologies adopted for aerial networks, where aBSs are
deployed to serve ground users. Since there have been only sporadic results
reported on the use of RSMA in aerial systems, we aim to extend the discussion
on this topic by modelling and analyzing the weighted sum-rate performance of a
two-user downlink network served by an RSMA-based aBS. Finally, related open
issues and future research directions are exposed.Comment: 16 pages, 6 figures, submitted to IEEE Journa
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