DF-Sense: multi-user acoustic sensing for heartbeat monitoring with dualforming

Lei Wang, Tao Gu, Wei Li, Haipeng Dai, Yong Zhang, Dongxiao Yu, Chenren Xu, Daqing Zhang

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

4 Citations (Scopus)

Abstract

Acoustic sensing for heartbeat monitoring has become a prevailing research topic in wireless sensing. Existing acoustic sensing systems have two limitations - -limited sensing range, and heartbeat monitoring for a single user only, hindering the large-scale deployment of applications. In this paper, we present DF-Sense, a Dual Forming based multi-user acoustic Sensing system for heartbeat monitoring in home settings. Specifically, we design a novel sensing signal-to-noise ratio (SSNR) enhancement model, namely Dualforming, based on the constructive superposition across multiple subcarriers and microphones, and further build the quantitative relationship between critical factors and SSNR enhancement to optimize sensing performance. To enable Dualforming, we propose a novel MUltiple Subtle SIgnal Classification (MUS2IC) method to identify multiple subjects with subtle motions. We implement DF-Sense using commercial acoustic devices and conduct extensive experiments in a home setting. Results show that DF-Sense achieves high precision measurement of instantaneous heart rate within the range of 10 m, which is sufficient for most daily space requirements, and is able to monitor heartbeat for up to 6 subjects in a 2-D space simultaneously.

Original languageEnglish
Title of host publicationMobiSys '23
Subtitle of host publicationproceedings of the 21st Annual International Conference on Mobile Systems, Applications and Services
Place of PublicationNew York
PublisherAssociation for Computing Machinery
Pages1-13
Number of pages13
ISBN (Electronic)9798400701108
DOIs
Publication statusPublished - 2023
Event21st Annual International Conference on Mobile Systems, Applications and Services, MobiSys 2023 - Helsinki, Finland
Duration: 18 Jun 202322 Jun 2023

Conference

Conference21st Annual International Conference on Mobile Systems, Applications and Services, MobiSys 2023
Country/TerritoryFinland
CityHelsinki
Period18/06/2322/06/23

Keywords

  • Beamforming
  • Acoustic Sensing
  • Heartbeat

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