System level integration of handheld wireless non-contact vital sign detectors

Xiaogang Yu, Changzhi Li, Jenshan Lin

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

4 Scopus citations

Abstract

An integrated non-contact vital sign detector for handheld applications is demonstrated. The detector includes a radio frequency transceiver, baseband analog circuits, and a baseband signal processor. The RF transceiver transmits a continuous RF signal toward the subject and receives the reflected signal. The direct conversion receiver chain downconverts the received signal to baseband and the baseband analog circuit further amplifies and level-shifts the output. The signal processor performs spectrum analysis on the baseband signal. The baseband signal processor is realized by an ARM7TDMI microprocessor. Key algorithm of the spectrum analysis is described in detail. Experiments were performed with two subjects, a human subject and an actuator moving in two-tone motion. Results were analyzed to verify the accuracy of the detection. The guideline on selecting sampling frequency for different applications is described.

Original languageEnglish
Title of host publicationRWS 2009 IEEE Radio and Wireless Symposium, Proceedings
Pages514-517
Number of pages4
DOIs
StatePublished - 2009
Event2009 IEEE Radio and Wireless Symposium, RWS 2009 - San Diego, CA, United States
Duration: Jan 18 2008Jan 22 2008

Publication series

NameRWS 2009 IEEE Radio and Wireless Symposium, Proceedings

Conference

Conference2009 IEEE Radio and Wireless Symposium, RWS 2009
CountryUnited States
CitySan Diego, CA
Period01/18/0801/22/08

Keywords

  • Doppler radar
  • Fast fourier transform
  • Non-contact
  • Signal processor
  • Spectrum analysis
  • Vital sign detection

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