Cooperative multi-point transmission raises drone coverage from about 28% to 60% at low SIR thresholds, but high-altitude drone coverage remains below ground coverage due to down-tilted base station antennas.
Cell-free Massive MIMO for UAV Communications
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abstract
We study support for unmanned aerial vehicle (UAV) communications through a cell-free massive MIMO architecture. Under the general assumption that the propagation channel between the mobile stations, either UAVs or ground users, and the access points follows a Ricean distribution, we derive closed form spectral efficiency lower bounds for uplink and downlink with linear minimum mean square error (LMMSE) channel estimation. We also propose power allocation and user scheduling strategies for such a system. Our numerical results reveal that a cell-free massive MIMO architecture may provide better performance than a traditional multicell massive MIMO network deployment.
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2019 1verdicts
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Mobility in the Sky: Performance and Mobility Analysis for Cellular-Connected UAVs
Cooperative multi-point transmission raises drone coverage from about 28% to 60% at low SIR thresholds, but high-altitude drone coverage remains below ground coverage due to down-tilted base station antennas.