20.500.12556/RUP-23050 Comparative testing of radar signal representations when sensing through materials The ability to sense mid-air gestures with miniaturised radars embedded in everyday objects opens up new opportunities for interaction. Applications include integration into wearable devices, automotive dashboards, smart furniture, and other components within smart environments. Despite this potential, the lack of studies on how various occluding materials affect gesture recognition performance hinders progress in this area. Previous studies have primarily focused on evaluating only one type of radar signal representation, despite the fact that several other representations exist and were proved effective. To address this, the chapter presents a comparative evaluation of four radar signal representations: In-phase and Quadrature (IQ) representations in the frequency domain and magnitude and range-angle (including both elevation and azimuth components) and range-Doppler. The goal is to assess their robustness against signal distortions introduced by occluding materials. Preliminary results indicate that recognition performance tends to improve with a higher transmission coefficient. Moreover, range-Doppler and range-angle representations exhibit significantly greater robustness to distortion compared to IQ representations Miniaturni radarji, vgrajeni v vsakdanje predmete, omogočajo zaznavanje gest v zraku in odpirajo nove možnosti za interakcijo. Potencialne uporabe vključujejo nosljive naprave, avtomobilske armaturne plošče, pametno pohištvo in druge komponente pametnih okolij. Kljub temu so potrebne dodatne raziskave, da bi bolje razumeli, kako različni prekrivni materiali vplivajo na uspešnost prepoznavanja gest. Predhodne študije so se večinoma osredotočale le na en tip predstavitve radarskega signala, čeprav obstaja več drugih predstavitev, za katere je bilo že pokazano, da so učinkovite. Za obravnavo tega vprašanja poglavje predstavlja primerjalno vrednotenje štirih predstavitev radarskih signalov: IQ predstavitve v frekvenčni domeni, magnitudo IQ, range-angle (vključno z elevacijskimi in azimutnimi komponentami) ter range-Doppler. Cilj je oceniti njihovo robustnost glede na popačenja signalov, ki jih povzročajo prekrivni materiali. Prvotni rezultati kažejo, da se uspešnost prepoznavanja praviloma izboljšuje z višjim koeficientom prepustnosti. Poleg tega sta predstavitvi range-Doppler in range-angle pokazali bistveno večjo odpornost proti popačenju v primerjavi z IQ. comparative testing radar signal representations sensing through materials primerjalno testiranje upodabljanje radarskih signalov zaznavanje skozi materiale true false true Angleški jezik Slovenski jezik Neznano 2026-05-18 12:52:20 2026-05-18 12:52:21 2026-05-19 03:06:53 0000-00-00 00:00:00 2026 0 0 Str. 47-61 0000-00-00 PreprintVObjavi NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004 1571-5035 277017603 10.1007/978-3-032-04327-6_3 277081347 RAZ_Attygalle_Nuwan_2026.pdf RAZ_Attygalle_Nuwan_2026.pdf 1 6E5CE255D09D47F423F390C545F5D97E 60956d2233f9c9cbd3616ebd5e4c4efa359e3f9aab1008cb2bb1631fb91c38eb f3ac214d-52a7-11f1-9e8d-005056ac49c0 https://repozitorij.upr.si/Dokument.php?lang=slv&id=33682 https://link.springer.com/chapter/10.1007/978-3-032-04327-6_3 1 8c7cbc49-52a7-11f1-9e8d-005056ac49c0 https://repozitorij.upr.si/Dokument.php?lang=slv&id=33681 Fakulteta za matematiko, naravoslovje in informacijske tehnologije 0 0 0