Abstract
Radio frequency-based localization techniques have undergone rapid development in recent years. However, existing localization systems on commercial Wi-Fi devices are either impractical or inaccurate. The newly emerging WiGig devices use millimeter-wave signals to communicate. As they have much more antennas than Wi-Fi devices, and they also have a higher angular resolution. However, because of cost limitations, commercial WiGig devices use analog beamforming, and the channel response of each antenna is unavailable. In this work, we propose WiGLoc a system for WiGig devices that provides accurate localization. To achieve this goal, we model the RSS of the antenna array, from which the CSIs of individual antennas are recovered. Then, the antenna array is calibrated, and the array geometry is obtained. WiGLocestimates AoDs from WiGig APs to the target with antenna CSIs and array geometry to localize the target. Experimental results show that the average 3D tracking and 2D localization errors of WiGLocare only 6 and 27 cm, respectively; whereas those of the state-of-the-art beamforming approach are 11 and 44 cm, respectively.
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