Noise analysis for noncontact vital sign detectors

Xiaogang Yu, Changzhi Li, Jenshan Lin

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

8 Scopus citations

Abstract

A method for analyzing the overall noise performance of vital sign detectors is introduced. For demonstration purpose, the noise analysis on a quadrature direct-conversion vital sign detector is performed. The detector is divided into three sub-systems including RF Front-end amplifiers, mixer with LO, and baseband amplifiers. The noise characteristics of the sub-systems are studied individually and combined to form the overall noise evaluation of the detector. The study on mixer sub-system results in a key design consideration of mixer. The signal-to-noise ratio at the sampler input is defined as the output SNR and is used to measure the overall noise performance of the vital sign detectors. The effect of output SNR on vital sign detection is presented. Tradeoff between output SNR and detection distance is verified by the experimental results.

Original languageEnglish
Title of host publication2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010
DOIs
StatePublished - 2010
Event2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010 - Melbourne, FL, United States
Duration: Apr 12 2010Apr 13 2010

Publication series

Name2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010

Conference

Conference2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010
CountryUnited States
CityMelbourne, FL
Period04/12/1004/13/10

Keywords

  • Doppler radar
  • Flicker noise
  • Mixer
  • Noise analysis
  • Non-contact
  • SNR
  • Vital sign detection

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