A Survey On Wi-Fi Based Contactless Activity Recognition

Providing accurate information about human's state and activity is one of the most important elements in Ubiquitous Computing. Various applications can be enabled if one's state and activity can be recognized. Due to the low deployment cost and non-intrusive sensing nature, Wi-Fi based activity recognition has become a promising and emerging research area. In this paper, we survey the state-of-the-art of the area from four aspects ranging from historical overview, theories and models, key techniques to applications. In addition to the summary about the principles and achievements of existing work, we also highlight some open issues and research directions in this emerging area.