TELECOMMUNICATIONS AND RADIO ENGINEERING - 2009 Vol. 68,
No 9 		 

 

 

 

Doppler Spectra of Human Breathing and Stochastic Models for their Description

O.V. Sytnik, I.A. Vyazmitinov, and Ye.I. Miroshnichenko
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine

Abstract
This paper describes the results from experimental studies on the coherent Doppler radar signals echoed from a human being. Spectral and temporal realizations of informational processes and their statistical characteristics are presented. It is shown that in the microwave-band sounding signal the process generated by the echo-signal phase modulation caused by human breathing has the properties of periodically correlated random process. The statistical characteristics of this process are calculated on an equidistant grating, the period of which is equal to that of process correlation. A stochastic criterion is proposed to estimate the correlation period. The ergodicity property of the process on an equidistant grating has been theoretically proved and experimentally confirmed.

References

  1. Bugayev, A.S., Vasiliev, I.A., Ivashov, S.I. et al., (2006), Radar methods of extracting breathing and heartbeat signals, Radiotekhnika and Elektronika. 51(10):1224-1239 (in Russian).
  2. Bugayev, A.S., Vasiliev, I.A., Ivashov, S.I. et al., (2003), Detection and remote diagnostics of the human beings condition behind obstacles using radar systems, Radiotekhnika. 7:42-47 (in Russian).
  3. Immoreev, I.Y., and Samkov, S.V., (2002), Ultra-Wideband (UWB) Radar for Remote Measuring of Main Parameters of Patients Vital Activity, IEEE Inter. Workshop “The Ultra Wideband and Ultra Short Impulse Signals (UMBUSIS-02), Kharkov, Ukraine.
  4. Daniels, D.J., (1996), Surface-penetrating radar. RA 006, ISBN 0 85296 862 0, 300 p.
  5. Ivashov, S.I., Sablin, V.N., and Vasilyev, I.A., (1999), Wide-Span Systems of Mine Detection, IEEE Aerospace & Electronic Systems Magazine. 14(5):6-8.
  6. Ivashov, S.I., Makarenkov, V.I., Razevig, V.V. at al., (2000), Remote Control Mine Detection System with GPR and Metal Detector, Proc. of the Eight Int. Conf. on Ground Penetrating Radar, GPR-00, Australia, pp.36-39.
  7. Ivashov, S.I., Isaenko, V.N., Konstantinov, V.F. Sablin, V.N. Sheyko, A.P., and Valilyev, I.A., (1998), GPR for Detection and Measurement of Filled up Excavations for Forensic Applications, Proc. of the Seventh Int. Conf. on Ground Penetrating Radar, GPR-98, Kansas, USA, pp. 87-89.
  8. Vertiy, A.A., Gavrilov, S.P., Voynovskyy, I.V., and Stepanyuk, V.N., (2002), The Millimeter wave Tomography Application for the Subsurface Imaging, Int. Journal of Infrared and Millimeter Waves. 23(10):1413-1444.
  9. Salman, O., Gavrilov, S.P., and Vertiy, A.A., (2002), Subsurface microwave imaging by using angular part of scattered field, Journal of Electromagnetic Wave and Applications. 16(11):1511-1529.
  10. Sytnik, O.V., Vyazmitinov, I.A., and Myroshnyshenko, Y.I., (2006), The features of radar developments for people detection under obstructions telecommunications and radio engineering, Fullerton L.W. US Patent No 7070806.
  11. Woodward, P.M., (1953), Probability and information theory with applications to radar, Pergamon Press, N.Y.
  12. Wilson, R., and Richter, J., (1979), generation and performanc of quadraphase welty codes for radar and synchronization of coherent and differentially coherent PSK, IEEE Trans. Comm. 27(9):641-647.
  13. Dragan, Ya.P., (1997), Energy theory of linear models of stochastic signals, The Center for strategic studies of eco-bio-technical systems, L’viv: 333 p. (in Russian).
  14. Gardner, W.A., (1987), Spectral correlation of modulated signals, Part 1: Analog modulation, IEEE Trans. on Comm. 35(6):584-594.


pages 779-788

Back