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

Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 202)

Abstract

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.

Keywords

Terahertz Heartbeat Breath Centroid SPWVD 

Notes

Acknowledgements

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

References

  1. 1.
    Siegel PH (2002) Terahertz technology. IEEE Trans Microw Theory Tech 50:910–928CrossRefGoogle Scholar
  2. 2.
    Wiltse JC (1984) History of millimeter and submillimeter waves. IEEE Trans Microw Theory Tech MTT-32:1118–1127Google Scholar
  3. 3.
    Michahelles F, Matter P, Schmidt A, Schiele B (2003) Applying wearable sensors to avalanche rescue: first experiences with a NovelAvalanche Beacon. Comput Graph 27:839–847CrossRefGoogle Scholar
  4. 4.
    Michahelles F, Wicki R Schiele B (2004) Less contact: heart-rate detection without even touching the user. In: Proceedings of the eighth international symposium on wearable computers, ArlingtonGoogle Scholar
  5. 5.
    Siegel PH (2004) Terahertz technology in biology and medicine. IEEE Trans Microw Theory Tech 52(10):2438–2447CrossRefGoogle Scholar
  6. 6.
    Greneker EF (1997) Radar sensing of heartbeat and respiration at a distance. Radar 97:150–154Google Scholar
  7. 7.
    Allen JB, Rabiner LR (1977) A unified approach to short-time Fourier transform analysis and synthesis. Proc IEEE 65(11):1558–1564CrossRefGoogle Scholar
  8. 8.
    Hlawatsch F, Krattcnthaler W (1992) Bilinear signal synthesis. IEEE Trans Signal Process 40(2):352–363MATHCrossRefGoogle Scholar
  9. 9.
    Hlawatsch F, Boudreaux-Bartcls GF (1992) Linear and quadratic time-frequency signal representations. IEEE Signal Process Mag 9(2):21–67CrossRefGoogle Scholar
  10. 10.
    Peltonen V, Tuomi J, Klapure A, Huopaniemi J, Sorsa T (2002) Computational auditory scene recognition. In: Proceedings of the IEEE international conference on acoustics, speech, and signal processing, vol 2. pp 1941–1944Google Scholar

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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