Impacts of Wall-Target Interaction on Matched Illumination Waveforms for TWRI

The impacts of wall-target interaction on matched illumination waveforms for through-the-wall radar imaging are examined via finite-difference time-domain simulation. Returns from various wall-target scenarios are considered as a function of the target-to-wall separation in order to examine the effe...

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Bibliographic Details
Published in:IEEE geoscience and remote sensing letters 2015-07, Vol.12 (7), p.1402-1405
Main Authors: Price, Steven R., Donohoe, J. Patrick, Fairley, Josh
Format: Article
Language:English
Subjects:
Clutter
Computational electromagnetics
Lighting
Radar imaging
Signal to noise ratio
target detection
through-wall imaging
through-wall radar
through-wall waveform design
Transfer functions
waveform design
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Summary:The impacts of wall-target interaction on matched illumination waveforms for through-the-wall radar imaging are examined via finite-difference time-domain simulation. Returns from various wall-target scenarios are considered as a function of the target-to-wall separation in order to examine the effectiveness of the so-called primary-wave target response in the matched illumination implementation. The primary-wave target response is shown to effectively maximize the signal-to-interference-and-noise ratio (SINR) in through-wall radar applications where the wall-target interaction is minor, and the primary-wave response closely resembles the full-wave target response, which contains all wall-target interactions. The ability of the primary-wave target response to maximize the SINR can be degraded by relatively minor errors in the wall-target transfer function caused by the incomplete wall-target physics inherent to the scheme. In such cases, the resulting matched illumination waveform spectrum is generally characterized by narrowband energy concentrated at suboptimal frequencies.
ISSN:1545-598X
1558-0571
DOI:10.1109/LGRS.2015.2403791