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Ultra-wide band (UWB) pulse radar has a definite advantage over optical ranging techniques, as to applicability to the harsh optical environment, such as the dark smog, or strong back-light. We have already proposed the extended Synthetic Aperture Radar (SAR) algorithm employing the multiple scattered waves, which aims at enhancing the reconstructible region of the target boundary including the shadow...
Application of through-wall radar requires the ability to detect targets through relatively high-density materials such as concrete, stone and brick. Ultra wideband (UWB) impulse technique is able to penetrate these materials. The capacity to make wall relatively transparent is due to the broad-band nature of the transmitted impulses. First of all, ultra wideband radar system block diagram is depicted...
Conventional SAR image formation algorithms can not remove the interference from multipath spreading events, so SAR images appear as ghosts. In this paper a multipath scattering model fit for stripmap SAR has been founded. By analyzing the model, we have obtained three characters of multipath ghosts, which are aspect dependence, lower resolution and non-ideal focusing. For low frequency band and large...
In ultra-wideband synthetic aperture radar (UWB SAR) imaging, scatterers often perform the frequency- and aspect angle-dependent reflectivity characteristic, which is usually neglected in traditional imaging processing. A novel UWB SAR time-frequency representation image formation (TFRIF) is proposed to retrieve the frequency- and aspect angle-dependent information, which is valuable in target detection...
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