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- W2247647985 abstract "The capability of ultra-wideband (UWB) radar systems for extracting and displaying signature information useful for target recognition purposes has been already demonstrated. The frequency content of the projected signals is designed to match the size and kind of prospective targets and environments. Low frequencies are required for deep penetration into the ground, and high frequencies for detailed target information. Such conflicting requirements cannot always be satisfied. The complex permittivity of a soil varies substantially with its moisture content. Dry soils have a relative permittivity close to that of most dielectric mines, with low contrast and detection difficulties as consequences. Moist soils have high complex-valued dielectric constant, which may prevent sufficient penetration of the high frequencies. Moisture content of the soil and target burial depth will alter the returned echo. Moreover, moisture content of the soil and target burial depth will distort the returned echo and hence also the target signature. In the present work we investigate the backscattered radar echoes of a metal target and a dielectric target under illumination by the waveform from an aboveground radar when they are buried at a few representative depths in Yuma soil of a few different moisture contents. These echoes are simulated by the Method- of-Moments (MoM) and then used to determine the targets' signatures as generated by a signal-adaptive time-frequency distribution. These time-frequency distributions can then be used as templates for actual target classification purposes using measured data." @default.
- W2247647985 created "2016-06-24" @default.
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- W2247647985 date "2002-07-25" @default.
- W2247647985 modified "2023-10-03" @default.
- W2247647985 title "<title>Influence of soil properties on time-frequency signatures of conducting and dielectric targets buried underground</title>" @default.
- W2247647985 doi "https://doi.org/10.1117/12.477020" @default.
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