Results 1 to 10 of about 38,989 (313)

A reconfigurable stepped frequency GPR (GPR-R): The antenna subsystem

2013 7th International Workshop on Advanced Ground Penetrating Radar, 2013
GPR-R technology fully exploits the unique advantages of the stepped frequency radar technique. A GPR equipment based on this technology has been recently developed by the authors: it is able to reconfigure its integration time and transmitted power vs. frequency in order to increase penetration capability and radiofrequency interference immunity. This
F Parrini, M Pieraccini, D Mecatti, D Dei, G Macaluso, A Spinetti, R Persico, G Leucci, G Manacorda   +8 more
openaire   +3 more sources

QoS of Internet Access with GPRS

Wireless Networks, 2001
In this paper we examine the effects of Internet traffic on the Quality of Service (QoS) in GPRS wireless networks. With a stochastic source traffic model describing the user behavior, we will derive subjective and objective Quality of Service measures in terms of WWW downloading time and the transmission bandwidths on TCP and TBF level.
Dirk Staehle, Kenji Leibnitz, Konstantin Tsipotis   +2 more
openaire   +1 more source

GPRS simulation in ns for WLAN and GPRS integration

Proceedings. 2004 International Conference on Information and Communication Technologies: From Theory to Applications, 2004., 2004
This work presents the GPRS simulation in NS for WLAN and GPRS integration. The interoperability between the access network WLAN and GPRS is of high importance in order to provide seamless mobility of the mobile user roaming between different access networks.
N.A. Adra, S. Tohme, M. Doughan
openaire   +1 more source

Development of an array-antenna GPR system (SAR-GPR)

SPIE Proceedings, 2005
SAR-GPR is a sensor system composed of a GPR and a metal detector for landmine detection. The GPR employs an array antenna for advanced signal processing for better subsurface imaging. This system combined with synthetic aperture radar algorithm, can suppress clutter and can image buried objects in strongly inhomogeneous material.
Motoyuki Sato, Xuan Feng, Takao Kobayashi, Zheng-Shu Zhou, Timofei G. Savelyev, Jun Fujiwara   +5 more
openaire   +1 more source

Numerical and Field Investigations of GPR: Toward an Airborne GPR

Subsurface Sensing Technologies and Applications, 2003
The main objective of our work is to explore the feasibility of designing an airborne RADAR system much like the University of Texas Institute for Geophysics airborne ice-penetrating radar systems for use in the detection of underground structures. Here we summarize our initial efforts toward achieving this goal.
Mrinal K. Sen, Paul L. Stoffa, Roustam K. Seifoullaev, Jacob T. Fokkema   +3 more
openaire   +1 more source

GPR-PRO: A MATLAB module for GPR data processing

Proceedings of the XIII Internarional Conference on Ground Penetrating Radar, 2010
GPR-Pro, is a flexible and user friendly module developed in MATLAB for processing mainly GPR data. This module can handle the most common GPR data formats. It provides a large number of signal processing algorithms including Principal Component Analysis, FK filtering, data manipulation (matrix algebra), attributes analysis as well as toolboxes for ...
S N Spanoudakis, A Vafidis
openaire   +1 more source

Antennas for GPR Systems

2015
Antennas are a critical hardware component of a radar system, dictating its performance in terms of capability to detect targets. In this Chapter, a wide review on Ground-Penetrating Radar (GPR) antennas is given. Firstly, the gen- eral characteristics of GPR antennas are resumed and the requirements they have to satisfy are listed: these are somehow ...
PAJEWSKI, Lara, Tosti, Fabio, Kusayanagi, Wolfgang   +2 more
openaire   +2 more sources

GPR Archaeometry

2009
Solving subsurface problems in the field of archaeology without destructively intervening with the buried materials has become a prime focus of the archaeological community. The science to study, measure and quantify archaeological structures remotely has been designated as the field of Archaeometry. Remotely detecting archaeological structures is very
Goodman D, Piro S, Nishimura Y, Schneider K, Hongo H, Higashi N, Steinberg J, Damiata B   +7 more
openaire   +3 more sources

GPR-based adaptive sensing - GPR manipulation according to terrain configurations

2004 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) (IEEE Cat. No.04CH37566), 2005
In this paper, we introduce an adaptive sensing method to a landform using a ground reflection of a ground penetrating radar (GPR). When GPR scans a ground surface, an antenna of GPR should be put on a ground as an ideal condition. The farther an antenna is put away from a ground, the shallower the sensing depth becomes, because a ground surface ...
Yasuhisa Hasegawa, Kazunori Yokoe, Yasuhiro Kawai, Toshio Fukuda   +3 more
openaire   +1 more source

A bandwidth-on-demand strategy for GPRS

IEEE Transactions on Wireless Communications, 2005
General packet radio service (GPRS) is a global system for mobile communications (GSM) packet data service. In order to efficiently accommodate GPRS traffic while maintaining the desired service quality of GSM calls, we propose a GPRS bandwidth-allocation strategy called the bandwidth-on-demand (BoD) strategy. The BoD strategy is adaptive to the change
Yieh-Ran Haung, Yi-Bing Lin
openaire   +1 more source