Towards 3D Centimeter-Level Passive Gesture Tracking With Two WiFi Links

WiFi-based passive gesture tracking plays a crucial role in promoting human-computer interface, due to its pervasive availability and cost-effectiveness. Prior works focus on tracking gestures on 2D sensing plane by aggregating multiple WiFi links (typically 2), with Uniform Linear Arrays (ULAs). Ho...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on mobile computing 2023-05, Vol.22 (5), p.3031-3045
Main Authors: Han, Zijun, Lu, Zhaoming, Wen, Xiangming, Guo, Lingchao, Zhao, Jingbo
Format: Magazinearticle
Language:English
Subjects:
3D tracking model
Azimuth
Channel State Information
Gesture recognition
Human-computer interface
Linear arrays
Links
OFDM
Passive gesture tracking
Spatial data
Target tracking
Three dimensional models
Three-dimensional displays
Tracking errors
Tracking systems
Training
Transceivers
Uniform linear array
Wireless fidelity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:WiFi-based passive gesture tracking plays a crucial role in promoting human-computer interface, due to its pervasive availability and cost-effectiveness. Prior works focus on tracking gestures on 2D sensing plane by aggregating multiple WiFi links (typically 2), with Uniform Linear Arrays (ULAs). However, gestures actually contain 3D spatial information instead of just 2D, thus interpreting the 3D traces as 2D may lead to enormous tracking errors. This paper aims at exploring the possibility of passively tracking 3D hand traces likewise leveraging two WiFi links with standard 3-element ULAs, and presents a generic 3D centimeter-level passive gesture tracking system, called CentiTrack-3D. To this end, we make two key observations: (1) The ULA-resolved angle contains the integrated information of the azimuth and elevation in 3D space, despite its inability to estimate azimuth and elevation separately. (2) The radial motion deviating from the sensing plane also leads to length variations of paths. Motivated by the observations, a 3D tracking model named Chaos is elaborately designed to deduce the hand 3D coordinates, so as to track the traces. Extensive experiments yield that CentiTrack-3D achieves an overall median tracking granularity of 2.5 cm in 3D space in case of diverse users and environment conditions.
ISSN:1536-1233
1558-0660
DOI:10.1109/TMC.2021.3123694