Beneficial Effects of Self-Motion for the Continuous Phase Analysis of Ac-Coupled Doppler Radars

dc.creatorFerro, Luigi
dc.creatorLi, Changzhi (TTU)
dc.creatorScandurra, Graziella
dc.creatorCiofi, Carmine
dc.creatorCardillo, Emanuele
dc.date.accessioned2024-03-18T18:45:58Z
dc.date.available2024-03-18T18:45:58Z
dc.date.issued2024
dc.description© 2024 by the authors. cc-by
dc.description.abstractThis paper analyzes the beneficial effects on phase detection arising from the motion of an ac-coupled Doppler radar. Indeed, although the presence of an ac coupling stage suppresses the dc offset after the receiver RF output, due to the coupling capacitor, a high-pass behavior is introduced; the presence of a high-pass behavior leads to signal distortion, particularly for low Doppler frequencies, which are typical in many biomedical or industrial applications. Since the target displacement is usually extracted from the phase history, this effect might, in turn, worsen the overall accuracy of the system. Moreover, if the target alternates stationary and moving time intervals, the phase detection step becomes challenging. Indeed, during the stationary time, the output of the RF front-end shows only noise fluctuations that, in turn, result in uncorrelated phases which might be confused with the real target displacement. This negative effect might be avoided by keeping the radar continuously moving, thus exploiting what is usually considered a state that is negative and worthy of attention. In this contribution, this effect is addressed from a different perspective, and ad hoc experimental case studies are shown to demonstrate the effectiveness of the proposed system. This task has been accomplished through theoretical analysis and related experimental activity.
dc.identifier.citationFerro, L., Li, C., Scandurra, G., Ciofi, C., & Cardillo, E.. 2024. Beneficial Effects of Self-Motion for the Continuous Phase Analysis of Ac-Coupled Doppler Radars. Electronics (Switzerland), 13(4). https://doi.org/10.3390/electronics13040772
dc.identifier.urihttps://doi.org/10.3390/electronics13040772
dc.identifier.urihttps://hdl.handle.net/2346/97739
dc.language.isoeng
dc.subjectac-coupling
dc.subjectDoppler radar
dc.subjectlow-frequency noise
dc.subjectphase analysis
dc.subjectradar self-motion
dc.titleBeneficial Effects of Self-Motion for the Continuous Phase Analysis of Ac-Coupled Doppler Radars
dc.typeArticle

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