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Commodity Wi-Fi-Based Wireless Sensing Advancements over the Past Five Years.

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Summary

Wi-Fi sensing leverages channel state information (CSI) from commodity devices for applications like localization and activity recognition. This review details recent advancements, challenges, and future directions for practical Wi-Fi sensing.

Keywords:
CSIWi-Fi sensingcommodity-off-the-shelfintegrated sensing and communication

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Area of Science:

  • Wireless communication
  • Signal processing
  • Ubiquitous sensing

Background:

  • Wi-Fi sensing utilizes Channel State Information (CSI) for diverse applications since 2010.
  • Integrated Sensing and Communication (ISAC) is a growing field driving Wi-Fi sensing advancements.
  • Commodity-off-the-shelf (COTS) Wi-Fi devices are increasingly used for wireless sensing.

Purpose of the Study:

  • To retrospect recent achievements in Wi-Fi sensing over the past 5 years.
  • To categorize studies based on application diversity and sensing methodologies.
  • To identify key challenges and future research directions for practical Wi-Fi sensing.

Main Methods:

  • Review and categorization of Wi-Fi sensing studies.
  • Analysis of CSI signal properties and sensing models.
  • Identification of domain dependency and range limitations.

Main Results:

  • Overview of Wi-Fi sensing applications including localization, imaging, activity recognition, and vital sign monitoring.
  • Categorization of recent research from application and methodology perspectives.
  • Highlighting domain dependency and sensing range limitations as key challenges.

Conclusions:

  • Wi-Fi sensing has shown significant progress using COTS devices.
  • Addressing current challenges is crucial for ubiquitous and practical Wi-Fi sensing.
  • Future research should focus on overcoming limitations for real-world deployment.