title: Study on a non-contact life parameter detection system using millimeter wave.
abstract: OBJECTIVE
  To study the basic principle and design method of a non-contact life detection system using 36 GHz millimeter wave.
  
  
  METHODS
  Continuous wave radar techniques and signal processing techniques including zero intermediate frequency, frequency domain accumulation and adaptive noise cancellation were used in the system.
  
  
  RESULTS
  When the radiated power was about a milliwatt (mW) and detection range was up to 3 meters, the experimental results showed that this system can well detect the heartbeat and respiration signals from human subjects through common clothes and quilts.
  
  
  CONCLUSIONS
  The system is feasible and effective due to its high detection sensitivity, small antenna, simple structure, easy miniaturization and safety to the human subject. It can be used for long-term continuous monitoring, especially suitable for the astronauts.
authors.affiliation: Biomedical Engineering Research Institute, Xi'an Jiaotong University, Shanxi Xi'an. wangjq@fmmu.edu.cn
authors.forename: Jian-qi
authors.initials: JQ
authors.lastname: Wang
authors.forename: Chong-xun
authors.initials: CX
authors.lastname: Zheng
authors.forename: Xi-jing
authors.initials: XJ
authors.lastname: Jin
authors.forename: Guo-hua
authors.initials: GH
authors.lastname: Lu
authors.forename: Hai-bin
authors.initials: HB
authors.lastname: Wang
authors.forename: An-sheng
authors.initials: AS
authors.lastname: Ni
mesh_terms: D000337:Aerospace Medicine / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D005260:Female; D005583:Fourier Analysis; D006339:Heart Rate; D006801:Humans; D008297:Male; D008872:Microwaves; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods; D019114:Remote Consultation; D012119:Respiration; D012815:Signal Processing, Computer-Assisted