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SPARX, a MIMO Array for Ground-Based Radar Interferometry.

Sensors (Basel, Switzerland)·2019
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Related Experiment Video

Updated: May 12, 2026

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
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Multipath exploitation in through-wall radar imaging via point spread functions.

Pawan Setlur, Giovanni Alli, Luigia Nuzzo

    IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
    |April 10, 2013
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel technique to eliminate false targets in through-wall radar sensing by mapping multipath ghosts to their genuine sources. This method enhances signal-to-clutter ratio (SCR) for accurate target detection.

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    Last Updated: May 12, 2026

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    Area of Science:

    • Radar Sensing
    • Electromagnetics
    • Signal Processing

    Background:

    • Through-wall radar sensing faces challenges from multipath reflections causing ghost targets.
    • These ghosts are false positives, complicating accurate target identification in synthetic aperture beamformed images.

    Purpose of the Study:

    • To develop a multipath exploitation technique to accurately identify and remove ghost targets in through-wall radar sensing.
    • To enhance the effective signal-to-clutter ratio (SCR) at genuine target locations.

    Main Methods:

    • A multipath model using Householder transformation for multiple reflections and unconventional geometries.
    • Derivation of closed-form solutions for ghost locations assuming free-space propagation.
    • Nonlinear least squares optimization initialized with free-space solutions for ghost localization.

    Main Results:

    • A general exploitation approach not requiring prior target number assumptions.
    • The technique is applicable to urban canyon multipath exploitation using synthetic aperture radar.
    • Analytical expressions for SCR gain post-exploitation were derived and validated.

    Conclusions:

    • The developed technique effectively associates multipath ghosts with genuine targets in through-wall radar.
    • This significantly improves target detection accuracy and SCR by mitigating false positives.
    • The method offers a robust solution for radar sensing in complex environments.