Wideband synthetic aperture beamforming for through-the-wall imaging.
Through-the-wall radar imaging (TWRI) and sensing is emerging as an important area of research and development [1]–[6]. A TWRI system provides enhanced situational awareness in operational environments for a variety of civilian and military applications. In particular, a TWRI system facilitates real...
| Main Authors: | , |
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| Format: | |
| Language: | English |
| Published: |
2008
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| Online Access: | http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:173789 |
| Summary: | Through-the-wall radar imaging
(TWRI) and sensing is
emerging as an important
area of research and development
[1]–[6]. A TWRI system
provides enhanced situational awareness
in operational environments for a variety
of civilian and military applications. In
particular, a TWRI system facilitates realtime
information gathering and intelligent
decision-making about the contents
of the indoor scene. Compared to other
radar applications, TWRI faces unique
challenges due to signal propagation
through walls. The composition and
thickness of the wall, its dielectric constant,
and the angle of incidence affect
the strength and characteristics of the
propagating signal. The change in propagation
speed and wave refraction must be
taken into account for effective and accurate
imaging. Failure to do so would
cause undesirable errors in determining
the nature and locations of the targets
behind walls. In this article, we present a
synthetic aperture beamforming
approach that uses ray perturbation theory
to account for the effects of transmission
through a single uniform wall. |
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