20.500.12556/RUL-148274 Direction of arrival estimation for BLE antenna array design and evaluation The use of smart antenna arrays in wireless communication systems is becoming increasingly popular, as they improve the performance of the radio link and allow the integration of communication and sensing functions. In this paper, we present the design and performance evaluation of a uniform circular antenna array (UCAA) with 12 monopole antennas and RF switches to select the active antenna for the signal direction of arrival (DoA) estimation. The antenna configuration was optimized through simulations for a different number of antennas and antenna array radius. The frequency tuning of the antennas considered the coupling of the active antenna with adjacent antennas. The performance of the antenna array was evaluated by (1) simulations that examined the proximity of the antenna to the edge of the antenna array and the influence of adjacent antennas on the performance of the active antenna, and (2) measurements in outdoor and indoor environments. The results of the simulations show that antenna coupling can cause nulls in the radiation pattern, which affects the DoA estimation by reducing the signal-to-noise ratio. In a semi-controlled environment, we achieved a DoA estimation error of less than 1 degree by using the Bluetooth Low Energy (BLE) Angle of Arrival feature. antenna array RF switch direction of arrival Bluetooth Low Energy phase difference MUSIC algorithm MUSIC spectrums polje anten RF-stikalo ocena kota nizkoenergijski Bluetooth fazna razlika algoritem MUSIC true false true Angleški jezik Slovenski jezik Članek v reviji 2023-08-09 11:21:43 2023-08-09 11:21:51 2023-08-10 03:36:56 0000-00-00 00:00:00 2023 0 0 9 str. Vol. 168, art. 154722 Aug. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.39 1618-0399 10.1016/j.aeue.2023.154722 153120259 1-s2.0-S1434841123001966-main.pdf 1-s2.0-S1434841123001966-main.pdf 1 9F4A696DE7385F481726D9B5079D0DC1 46cec01ee8e08d477c737c520567f96bb04d8f8976207a8ae376062dbcdf5ed0 6f2a9b0b-3696-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=172352 https://www.sciencedirect.com/science/article/pii/S1434841123001966 0 249c147c-3696-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=172351 Fakulteta za elektrotehniko 0 0 0