Speed Estimation Using Commercial Wi-Fi Device in Smart Home  

作　　者：TIAN Zengshan YE Chenglin ZHANG Gongzhui HE Wei JIN Yue 

机构地区：[1]Chongqing University of Posts and Telecommunications,Chongqing 400065,China

出　　处：《ZTE Communications》2021年第2期44-52,共9页中兴通讯技术（英文版）

基　　金：This work was supported in part by the Science and Technology Research Project of the Chongqing Natural Science Foundation Project under Grant No.CSTC2020jcyj-msxmX0842;the National Natural Science Foundation of China under Grant Nos.61771083 and 61771209.

摘　　要：With the development of Internet of Things(IoT),the speed estimation technology has attracted significant attention in the field of indoor security,intelligent home and personalized service.Due to the indoor multipath propagation,the speed information is implicit in the motion-induced reflected signal.Thus,the wireless signal can be leveraged to measure the speed of moving target.Among existing speed estimation approaches,users need to either carry a specialized device or walk in a predefined route.Wi-Fi based approaches provide an alternative solution in a device-free way.In this paper,we propose a direction independent indoor speed estimation system in terms of Electromagnetic(EM)wave statistical theory.Based on the statistical characteristics of EM waves,we establish the deterministic relationship between the Autocorrelation Function(ACF)of Channel State Information(CSI)and the speed of a moving target.Extensive experiments show that the system achieves a median error of 0.18 m/s for device-free single target walking speed estimation.

关 键 词：CSI speed estimation electromagnetic wave direction-independent autocorrelation function 

分 类 号：TN92[电子电信—通信与信息系统] TU855[电子电信—信息与通信工程]