2021/02/10 by Francesco Betti Sorbelli, Sajal K. Das, Sorbelli, Francesco Betti +5
Engineering · #FOS: Electrical engineering #Indoor and Outdoor Localization Technologies #Microwave Imaging and Scattering Analysis #Signal Processing (eess.SP) #Underwater Vehicles and Communication Systems #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2102.05725
openalex publication_date 2021/02/10 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
In this work, the problem of localizing ground devices (GDs) is studied\ncomparing the performance of four range-free (RF) localization algorithms that\nuse a mobile anchor (MA). All the investigated algorithms are based on the\nso-called heard/not-heard (HnH) method, which allows the GDs to detect the MA\nat the border of their antenna communication radius. Despite the simplicity of\nthis method, its efficacy in terms of accuracy is poor because it relies on the\nantenna radius that continuously varies under different conditions. Usually,\nthe antenna radius declared by the manufacturer does not fully characterize the\nactual antenna radiation pattern. In this paper, the radiation pattern of the\ncommercial DecaWave DWM1001 Ultra-Wide-Band (UWB) antennas is observed in a\nreal test-bed at different altitudes for collecting more information and\ninsights on the antenna radius. The compared algorithms are then tested using\nboth the observed and the manufacturer radii. The experimental accuracy is\nclose to the expected theoretical one only when the antenna pattern is actually\nomnidirectional. However, typical antennas have strong pattern irregularities\nthat decrease the accuracy. For improving the performance, we propose\nrange-based (RB) variants of the compared algorithms in which, instead of using\nthe observed or the manufacturer radii, the actual measured distances between\nthe MA and the GD are used. The localization accuracy tremendously improves\nconfirming that the knowledge of the exact antenna pattern is essential for any\nRF algorithm.\n