A Survey of Wi-Fi Sensing Techniques with Channel State Information

Release Date:2020-09-28  Author:CHEN Liangqin, TIAN Liping, XU Zhimeng, CHEN Zhizhang  Click:

A Survey of Wi-Fi Sensing Techniques with Channel State Information

CHEN Liangqin1, TIAN Liping1, XU Zhimeng1, CHEN Zhizhang1,2
(1. College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108 , China; 2. Department of Electrical and Computer Engineering, Dalhousie University, Halifax B3H 4R2, Canada )

Abstract: A review of signal processing algorithms employing Wi-Fi signals for positioning and recognition of human activities is presented. The principles of how channel state information (CSI) is used and how the Wi-Fi sensing systems operate are reviewed. It provides a brief introduction to the algorithms that perform signal processing, feature extraction and recognitions, including location, activity recognition, physiological signal detection and personal identification. Challenges and future trends of Wi-Fi sensing are also discussed at the end.
Keywords: Wi-Fi sensing; channel state information; signal processing; classifications; feature extraction; positioning; location; recognitions

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