A Review on Methods for Random Motion Detection and Compensation in Bio-Radar Systems

Figures

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  Figure 1. Bio-Radar system block diagram [3].

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  Figure 2. Representation of the phase variation in the complex plane due to the target’s motion, considering a scenario without clutter.

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  Figure 3. Simulation of the phase variation in the complex plane due to the target’s motion.

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  Figure 4. Variation of the arc length with chest-wall motion amplitude: (a) ar=λ/8 m; (b) ar=λ/4 m; (c) ar=λ/2 m.

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  Figure 5. Variation of the arc length with the wavelength for the same ar: (a) fc=2.5 GHz; (b) fc=5.8 GHz; (c) fc=10 GHz.

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  Figure 6. Variation of the arc position of the nominal distance d0: (a) d0=1 m; (b) d0=2 m; (c) d0=3 m.

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  Figure 7. Variation arc radius with the received signal amplitude A0.

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  Figure 8. Respiratory signal recover: (a) Respiratory waveform; (b) its spectrum (zoomed in) with the respiratory component f1=0.4333Hz represented.

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  Figure 9. Respiratory signal distorted by RM: (a) Effect on the polar plot; (b) Waveform after phase demodulation.

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  Figure 10. Respiratory signal distorted by RM: (a) RM signal waveform with a soft level of noise; (b) Spectrum with a soft level of RM noise; (c) Zoomed in spectrum for a soft level of noise; (d) RM signal waveform with a higher level of noise; (e) Spectrum with a higher level of RM noise; (f) Zoomed in spectrum for a higher level of noise