Design and Implementation of a VTOL Flight Transition Mechanism and Development of a Mathematical Model for a Tilt Rotor UAV

Paiva, Enrique; Llano, Marcelo; Rodas, Jorge; Gregor, Raúl; Rodríguez-Piñeiro, José; Gomez-Redondo, Marcos

doi:10.1109/ica-acca.2018.8609836

Cited by 9 publications

(1 citation statement)

References 3 publications

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“…It also leads to inter-carrier interference (ICI), hence making it necessary to include ICI cancellation methods at the receiver or more advanced channel equalization techniques. The RMS Doppler Frequency Spread is calculated as the second-order central moment of the Doppler PSD, in a analogous way as that described by ( 6)- (8). Let us define the normalized Doppler PSD for the ith frame, by applying a similar strategy as for the delay, as…”

Section: E Root Mean Square Doppler Frequency Spreadmentioning

confidence: 99%

Air-to-Ground Channel Characterization for Low-Height UAVs in Realistic Network Deployments

Rodríguez-Piñeiro

Domínguez-Bolaño

Cai

et al. 2021

IEEE Trans. Antennas Propagat.

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Due to the decrease in cost, size and weight, Unmanned Aerial Vehicles (UAVs) are becoming more and more popular for general-purpose civil and commercial applications. Provision of communication services to UAVs both for user data and control messaging by using off-the-shelf terrestrial cellular deployments introduces several technical challenges. In this paper, an approach to the air-to-ground channel characterization for low-height UAVs based on an extensive measurement campaign is proposed, giving special attention to the comparison of the results when a typical directional antenna for network deployments is used and when a quasi-omnidirectional one is considered. Channel characteristics like path loss, shadow fading, root mean square delay and Doppler frequency spreads and the K-factor are statistically characterized for different suburban scenarios.

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Section: E Root Mean Square Doppler Frequency Spreadmentioning

confidence: 99%