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Related Experiment Video

Updated: Oct 5, 2025

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults

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A Lightweight Passive Human Tracking Method Using Wi-Fi.

Jian Fang^1,2, Lei Wang^1,2,3, Zhenquan Qin^1,2

¹School of Software Technology, Dalian University of Technology, Dalian 116620, China.

Sensors (Basel, Switzerland)

|January 22, 2022

Summary

This study introduces a Wi-Fi-enabled Infrared-like Device-free (WIDE) method for lightweight indoor target tracking. WIDE overcomes limitations of current methods by using Channel State Information for rapid and accurate human motion detection.

Keywords:

RSSI Wi-Fi channel state device-free sensing target tracking

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Area of Science:

Computer Science
Electrical Engineering
Robotics

Background:

Indoor target tracking is crucial for localization but current methods face challenges like high overhead, latency, and blind spots.
There's a growing need for lightweight tracking solutions that balance accuracy with efficiency.

Purpose of the Study:

To propose a novel, lightweight target tracking method called Wi-Fi-enabled Infrared-like Device-free (WIDE).
To address the limitations of existing target tracking techniques in indoor environments.

Main Methods:

Analyzing the physical layer impact of target movement on wireless links.
Developing a near real-time model correlating Channel State Information (CSI) with human motion.
Leveraging existing network infrastructure of deployed wireless devices.

Main Results:

The WIDE method demonstrates a lightweight approach to target tracking.
It achieves rapid target tracking capabilities.
Satisfactory tracking results were obtained across various environments.

Conclusions:

The WIDE method offers an effective and efficient solution for device-free indoor target tracking.
It successfully mitigates issues of overhead, latency, and blind spots associated with traditional methods.
WIDE's ability to utilize existing wireless networks makes it a practical and scalable solution.