Semkin, VasiliiKang, SeongjoonHaarla, JaakkoXia, WilliamHuhtinen, IsmoGeraci, GiovanniLozano Solsona, AngelLoianno, GiuseppeMezzavilla, MarcoRangan, Sundeep2023-03-092023-03-092021Semkin V, Kang S, Haarla J, Xia W, Huhtinen I, Geraci G, Lozano A, Loianno G, Mezzavilla M, Rangan S. Lightweight UAV-based measurement system for air-to-ground channels at 28 GHz. In: 2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC); 2021 Sep 13-16; Helsinki, Finland. [Piscataway]: IEEE; 2021. p. 848-53. DOI: 10.1109/PIMRC50174.2021.95695612166-9570http://hdl.handle.net/10230/56124Comunicació presentada a 2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), celebrat del 13 al 16 de setembre de 2021 de manera virtual.Wireless communication at millimeter wave frequencies is an attractive option for high-bit-rate connectivity to unmanned aerial vehicles (UAVs). However, conducting the channel measurements necessary to assess the communication performance at these frequencies has been challenging due to the severe payload and power restrictions in commercial UAVs. This work presents a novel lightweight (approximately 1.3kg) channel measurement system at 28GHz installed on a commercially available UAV. A ground transmitter equipped with a horn antenna conveys sounding signals to a UAV equipped with a lightweight spectrum analyzer. We demonstrate that the measurements can be highly influenced by the onboard antenna pattern as shaped by the UAV’s frame. A calibration procedure is presented to correct for the resulting angular variations in antenna gain. The measurement setup is then validated on real flights from an airstrip at distances in excess of 300m.application/pdfeng© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. http://dx.doi.org/10.1109/PIMRC50174.2021.9569561info:eu-repo/semantics/conferenceObjecthttp://dx.doi.org/10.1109/PIMRC50174.2021.9569561Antenna measurementsWireless communicationPower measurementShape measurementTransmitting antennasRadio transmittersMillimeter wave measurementsinfo:eu-repo/semantics/openAccess