BLE Localization With Polarization Sensitive Array
Bowen Wang, Yunlong Wang, Xinyou Qiu, Yuan Shen
Abstract
This letter presents a design and implementation of a bluetooth low energy (BLE) localization scheme using polarization sensitive arrays, where both the direction and polarization information is explored for high-accuracy positioning. The signal frequency offset and channel mismatch error are mitigated by the proposed frequency compensation and array calibration algorithm, respectively. Moreover, we develop an alternate search algorithm for angle estimation and derive the Cramer-Rao lower bound for performance evaluation. Finally, we design a real-time single-anchor BLE localization system using angular information, which is demonstrated to achieve a median localization accuracy of 30 cm in experiments.