Indoor Motion Detection Using Wi-Fi Channel State Information in Flat Floor Environments Versus in Staircase Environments

Sensors

Kaveh Pahlavan¹  Julang Ying¹  Zehua Dong²  Fangmin Li² 

[1] Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA;School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China;

关键词: motion detection;    Wi-Fi;    CSI;    indoor;    staircase;    fall detection;    intruder detection;   

DOI  :  10.3390/s18072177

来源: DOAJ

【 摘 要 】

Recently, Wi-Fi channel state information (CSI) motion detection systems have been widely researched for applications in human health care and security in flat floor environments. However, these systems disregard the indoor context, which is often complex and consists of unique features, such as staircases. Motion detection on a staircase is also meaningful and important for various applications, such as fall detection and intruder detection. In this paper, we present the difference in CSI motion detection in flat floor and staircase environments through analysing the radio propagation model and experiments in real settings. For comparison in the two environments, an indoor CSI motion detection system is proposed with several novel methods including correlation-based fusion, moving variance segmentation (MVS), Doppler spread spectrum to improve the system performance, and a correlation check to reduce the implementation cost. Compared with existing systems, our system is validated to have a better performance in both flat floor and staircase environments, and further utilized to verify the superior CSI motion detection performance in staircase environments versus flat floor environments.

【 授权许可】

Unknown