Terahertz Radar Signal for Heart and Breath Rate Detection Based on Time-Frequency Analysis

  • Yuanjie Wu
  • Zhengwu Xu
  • Jin Li
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 202)


The method of human heartbeat and breath detection in terahertz band is studied in this chapter which uses frequency information extraction with twice T-F (time-frequency) analysis towards echo signal. Firstly, the echo model of human target is built and accurate speed information, containing the micro features of human target,is got by the combination of WVD (Wigner-Ville distribution) T-F analysis and centroid curve. Then, frequency of heartbeat and breath is extracted accurately by the second T-F analysis. According to the comparative analysis, SPWVD (smoothed pseudo Wigner-Ville distribution) based on the windowed WVD can effectively reduce the disturbance of cross-terms which can favor the detection of heartbeat and breath.


Terahertz Heartbeat Breath Centroid SPWVD 



This work is supported by the Fundamental Research Funds for the Central Universities under Project ZYGX2011J020.


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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.School of Electronic EngineeringUniversity of Electronic Science and Technology of ChinaChengduChina

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