Holographic 6D Wirless Locating and Motion Tracking
A02 Sub-Project describes the development of a wireless radar localization system for human pose estimation. The goal is to track the full body with an update rate of up to 10 kHz in 6D (position and orientation) with millimeter accuracy. Therefore, wireless transmitters (‘beacons’) with low hardware complexity are positioned on the human body. These are equipped with sensors, e.g., electromyography or an inertial measurement unit (IMU), to gather additional information required for a comprehensive analysis. This data is transmitted simultaneously over the same radar signal, inherently linking measured data with positioning. Thus, no extra synchronization is required—a problem often encountered in a multi-sensor setup. The localization is achieved using the Holographic Extended Kalman Filter, which compares the phase of the RF signal at large apertures with expected phases to determine the sender’s position. Alongside IMU data, the absolute orientation is also determined, significantly enhancing its diagnostic value.
- Sippel E, Hehn M, Kögel T, Gröschel P, Hofmann A, Brückner S, Geiß J, Schober R, Vossiek M: Quasi-Coherent Phase-Based Localization and Tracking of Incoherently Transmitting Radio Beacons IEEE Access (2021)
- Brückner S, Weber J, Michler F, Shanin N, Schober R, Hagelauer A, Weigel R, Gaßner H, Winkler J, Eskofier B, Vossiek M: A Wireless Joint Communication and Localization EMG-Sensing Concept for Movement Disorder Assessment IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology (2023)
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