Multi-Resident Non-Contact Vital Sign Monitoring Using Radar: A Review

Anuradha Singh, Saeed Ur Rehman, Sira Yongchareon, Peter Han Joo Chong

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)


Vital signs are inarguably accepted as important key constituents to improve the health condition. Worldwide medical institutions and clinical observations have emphasized the need for continuous monitoring of vital signs such as heart rate (HR) and respiration rate (RR) for better health management. Radars are investigated as one of the potential technologies for non-contact continuous monitoring of vital signs. This paper provides a comprehensive technological review on the current state-of-art of non-contact vital sign (NCVS) measurements using radar. We highlight the need to move towards higher frequency for high accuracy in a multi-resident environment and analyze the implications of mmWave exposure on human health and the effect of environmental attenuation. Significant challenges associated with hardware and signal processing algorithm are discussed in detail. Finally, we conclude the review with future directions and challenges associated with the detection of vital signs in a multi-resident indoor environment.

Original languageEnglish
Article number9249383
Pages (from-to)4061-4084
Number of pages24
JournalIEEE Sensors Journal
Issue number4
Publication statusPublished - 15 Feb 2021


  • Radar
  • Device-free monitoring
  • Sensors
  • Vital sign detection
  • Radar measurements
  • Wellness system
  • Passive health monitoring


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