Device-Free Activity Recognition Using Ultra-Wideband Radios

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“Device-Free Activity Recognition Using Ultra-Wideband Radios” by Sarthak Sharma, Hessam Mohammadmoradi, Milad Heydariaan, and and Omprakash Gnawali. In Proceedings of the International Conference on Computing, Networking and Communications (ICNC 2019), Feb. 2019.


Human Activity Recognition (HAR) is a fundamental building block for the current trend of smart devices in Internet of Things (IoT). Ultra-Wideband RF technology has been used in localization research while WiFI Channel State Information (CSI) has been widely investigated for non-obtrusive activity recognition in the literature. This paper investigates the feasibility of using UWB technology for Human Activity Recognition (HAR). The key idea is to use machine learning classification algorithms most suited to train models to classify different activities using the Channel Impulse Response (CIR) data of the UWB signals. Our experiments show that by using CIR data as features we can classify simple activities such as standing, sitting, lying with a high accuracy, i.e. 95%. To compare this performance, we have also trained models using Wi-Fi CSI. We found that, for all models, UWB CIR significantly outperformed Wi-Fi CSI. Thus, we believe UWB to be a very effective technology in the space of device-free activity recognition.

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BibTeX entry:

   author = {Sarthak Sharma and Hessam Mohammadmoradi and Milad Heydariaan
	and and Omprakash Gnawali,},
   title = {Device-Free Activity Recognition Using Ultra-Wideband Radios},
   booktitle = {Proceedings of the International Conference on Computing,
	Networking and Communications (ICNC 2019)},
   month = feb,
   year = {2019}