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The main goal of this letter is to obtain models for path loss exponents and shadowing for the radio channel between airborne unmanned aerial vehicles (UAVs) and cellular networks. In this pursuit, field measurements were conducted in live LTE networks at the 800 MHz frequency band, using a commercial UAV. Our results show that path loss exponent decreases as the UAV moves up, approximating freespace...
This paper analyzes the radio channel between cellular network and Unmanned Aerial Vehichles (UAVs). The assessment is done by means of field measurements performed in a rural environment in Denmark. The tests were conducted in an operating LTE network (800 MHz), using a commercial cell phone placed inside the frame of a winged UAV. Trials were conducted with UAV flying at 5 different heights measured...
This paper presents the gains of Uplink Polarization and Spatial Diversity based on field measurements from UMTS/HSPA network. Two Branch (2-Way) and Four Branch (4-Way) receive diversity schemes are compared with Spatial and Polarization configurations. Polarization diversity offers similar gains as spatial diversity and is easily deployable with minimal implementation costs. The receive diversity...
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