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| Titel |
Analyses and Measures of GPR Signal with Superimposed Noise |
| VerfasserIn |
Simone Chicarella, Vincenzo Ferrara, Paolo D'Atanasio, Fabrizio Frezza, Lara Pajewski, Settimio Pavoncello, Santo Prontera, Nicola Tedeschi, Alessandro Zambotti |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250091114
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| Publikation (Nr.) |
 EGU/EGU2014-5387.pdf |
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| Zusammenfassung |
| The influence of EM noises and environmental hard conditions on the GPR surveys has been
examined analytically [1]. In the case of pulse radar GPR, many unwanted signals as
stationary clutter, non-stationary clutter, random noise, and time jitter, influence the
measurement signal. When GPR is motionless, stationary clutter is the most dominant signal
component due to the reflections of static objects different from the investigated target, and to
the direct antenna coupling. Moving objects like e.g. persons and vehicles, and the swaying
of tree crown, produce non-stationary clutter. Device internal noise and narrowband
jamming are e.g. two potential sources of random noises. Finally, trigger instabilities
generate random jitter. In order to estimate the effective influence of these noise signal
components, we organized some experimental setup of measurement. At first, we evaluated
for the case of a GPR basic detection, simpler image processing of radargram. In
the future, we foresee experimental measurements for detection of the Doppler
frequency changes induced by movements of targets (like physiological movements of
survivors under debris). We obtain image processing of radargram by using of GSSI
SIR® 2000 GPR system together with the UWB UHF GPR-antenna (SUB-ECHO
HBD 300, a model manufactured by Radarteam company). Our work includes both
characterization of GPR signal without (or almost without) a superimposed noise, and the
effect of jamming originated from the coexistence of a different radio signal. For
characterizing GPR signal, we organized a measurement setup that includes the following
instruments: mod. FSP 30 spectrum analyser by Rohde & Schwarz which operates in the
frequency range 9 KHz – 30 GHz, mod. Sucoflex 104 cable by Huber Suhner (10
MHz – 18 GHz), and HL050 antenna by Rohde & Schwarz (bandwidth: from 850
MHz to 26.5 GHz). The next analysis of superimposed jamming will examine two
different signal sources: by a cellular phone and by a transmitter operating in the
Instrumental Scientific Medical (ISM) band (around 2.4 GHz). In the first case,
signal of cellular phone is considered as an actual noise, and the measure should
provide guidance on its electromagnetic compatibility, in the sense of operating
limits of the GPR conditioning from the presence of signal transmitted by a cellular
phone. Whereas, the analysis of superimposed signals in the ISM band is oriented to
the implementation of a mobile GPR system that includes a transceiver, such as
XBee, for transmitting results of localization (e.g. of buried people) to a remote
station.
This work is a contribution to COST Action TU1208 "Civil Engineering Applications of
Ground Penetrating Radar."
J. Sachs, M. Helbig, R. Herrmann, M. Kmec, K. Schilling, E. Zaikov,
and P. Rauschenbach, “Trapped victim detection by pseudo-noise radar,” in
Proc. ACWR ’11 1st International Conference on Wireless Technologies for
Humanitarian Relief, Amritapuri, Kollam, Kerala, India, 2011, pp. 265-272 |
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