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Proceedings Paper

Reception and processing of electromagnetic pulses after propagation through dispersive and dissipative media
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Paper Abstract

Ultra-wideband (UWB) ground penetrating radar (GPR) systems are useful for extracting and displaying information for target recognition purposes. The frequency content of projected signals is designed to match the size and type of prospective targets and environments. The soil medium is generally dispersive and, if moist, dissipative as well. Hence, target signatures whether in the time, frequency or joint time-frequency domains, will substantially depend on the target's burial depth, and on the soil's moisture content. To be useful for target recognition purposes the signatures of a given target must be known for several typical burial depths and soil moisture contents. These signatures are then used as templates in the classification process. In an attempt at reducing the number of needed templates, we focus here on the propagation of the pulses in the dissipative soil medium. Disregarding for the moment the scattering interaction with the target, we examine the distortion of the emitted interrogating pulses as they propagate through the soil and are backscattered to the receiver. We simulated such returned target echoes earlier for several burial depths using a Method-of-Moments (MoM) code. They could then be all translated to equivalent echoes from the target at some selected standardized depth and soil moisture, and vice-versa. A sufficiently accurate signal processing method for depth conversion could be employed to reduce the number of templates required for the correct classification of subsurface targets with a GPR.

Paper Details

Date Published: 16 September 2003
PDF: 12 pages
Proc. SPIE 5094, Automatic Target Recognition XIII, (16 September 2003); doi: 10.1117/12.487789
Show Author Affiliations
H. C. Strifors, Swedish Defence Research Agency (Sweden)
Guillermo C. Gaunaurd, Army Research Lab. (United States)
Anders Sullivan, Army Research Lab. (United States)


Published in SPIE Proceedings Vol. 5094:
Automatic Target Recognition XIII
Firooz A. Sadjadi, Editor(s)

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