Pulse detection by gated synchronous demodulation

Spyros Efthymiou, Krikor B. Ozanyan

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    Abstract

    Synchronous demodulation (SD) is the signal recovery method of choice when the input envelope signal is modulated by either a pure sine wave or a square wave. SD is less efficient for pulsed periodic signals with a low duty factor. For the latter signals, we introduce data processing that applies gating on a part of the signal period to achieve optimum conditions for recovering the pulse amplitude by quadrature SD. The proposed method is evaluated for signal-to-noise performance against Boxcar-type gated integrators in simulated data, as well as data acquired from physical measurements, in the presence of 1/f and Gaussian noise. It is shown that by combining the gating and SD principles, our suggested gated SD outperforms other routine signal processing methods under typical 1/f noise conditions. © 2001-2012 IEEE.
    Original languageEnglish
    Article number6516910
    Pages (from-to)3349-3360
    Number of pages11
    JournalIEEE Sensors Journal
    Volume13
    Issue number9
    DOIs
    Publication statusPublished - 2013

    Keywords

    • Gated integration
    • pulse detection
    • quadrature detection
    • synchronous demodulation

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