Searched for: subject%3A%22Radar%255C%2Bsystems%22
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Ruiz-Armenteros, A.M. (author), Lazecky, M. (author), Hlavacova, I. (author), BakoAaˆ, M. (author), manuel Delgado, J. (author), Sousa, J.J. (author), Lamas-Fernandez, F. (author), Marchamalo, M. (author), Caro-Cuenca, M. (author), Papco, J. (author), Perissin, D. (author)
Dams require continuous security and monitoring programs, integrated with visual inspection and testing in dam surveillance programs. New approaches for dam monitoring focus on multi-sensor integration, taking into account emerging technologies such as GNSS, optic fiber, TLS, InSAR techniques, GBInSAR, GPR, that can be used as complementary data...
conference paper 2018
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Deiana, D. (author), Nennie, F. (author), Boekema, R.B. (author), van Rossum, W. (author), Monni, S. (author)
N-path filters exploiting switched-series-R-C networks can realize high-Q blocking-tolerant band-pass filters. Moreover, their center frequency is flexibly programmable by a digital clock. Unfortunately, the time variant nature of these circuits also results in unwanted signal folding. This paper proves analytically that folding can be reduced...
conference paper 2017
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van Loon, K. (author), Breteler, M.J.M. (author), van Wolfwinkel, L. (author), Rheineck Leyssius, A.T. (author), Kossen, A.S. (author), Kalkman, C.J. (author), van Zaane, B. (author), Peelen, L.M. (author)
Altered respiratory rate is one of the first symptoms of medical conditions that require timely intervention, e.g., sepsis or opioid-induced respiratory depression. To facilitate continuous respiratory rate monitoring on general hospital wards a contactless, non-invasive, prototype monitor was developed using frequency modulated continuous wave...
article 2016
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Nooij, P.N.C. (author), Theil, A. (author)
Blake chart computations are widely employed to rank detection coverage capabilities of competitive search radar systems. Developed for comparable 2D radar systems with a mechanically rotating reflector antenna, it was not necessary to regard update rate and plot quality in Blake's chart. To characterize the system's critical awareness, the...
conference paper 2014
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Deiana, D. (author), Suijker, E.M. (author), Bolt, R.J. (author), Maas, A.P.M. (author), Vlothuizen, W.J. (author), Kossen, A.S. (author)
A novel FMCW radar on a chip operating in the 24 GHz band has been used for presence detection in an office environment. Real time detection of small movements (i.e. typing) has been demonstrated. A comparison of the performances of the radar sensor and of the traditional intelligent lighting PIR sensor has been carried out. While the radar is...
conference paper 2014
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Belfiori, F. (author), van Rossum, W.L. (author), Hoogeboom, P. (author)
In this paper the authors analyze the use of Time Division Multiple Access (TDMA) applied to coherent Multiple-Input Multiple-Output (MIMO) radar systems. One of the main limitations in exploiting the orthogonal condition in the time domain for MIMO radars is the reduction of the unambiguous Doppler interval. With respect to frequency modulated...
conference paper 2012
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Engelen, S. (author), van den Oever, M. (author), Mahapatra, P.S. (author), Sundaramoorthy, P.P. (author), Gill, E.K.A. (author), Meijer, R.J. (author), Verhoeven, C.J.M. (author)
Nano-satellites have a cost advantage due to their low mass and usage of commercial-off-the-shelf technologies. However, the low mass also restricts the functionality of a nano-satellite's payload. Typically, this would imply instruments with very low to low resolution and accuracy, essentially ruling out applications such as remote sensing....
conference paper 2012
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Engelen, S. (author), van den Oever, M. (author), Mahapatra, P. (author), Sundaramoorthy, P. (author), Gill, E. (author), Meijer, R.J. (author), Verhoeven, C. (author)
Nano-satellites have a cost advantage due to their low mass and usage of commercial-off-the-shelf technologies. However, the low mass also restricts the functionality of a nano-satellite's payload. Typically, this would imply instruments with very low to low resolution and accuracy, essentially ruling out applications such as remote sensing....
conference paper 2012
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van Heijningen, M. (author), van der Bent, G. (author), Rodenburg, M. (author), van Vliet, F.E. (author), Quay, R. (author), Brückner, P. (author), Schwantuschke, D. (author), Jukkala, P. (author), Narhi, T. (author)
Solid-state power amplifiers at W-band (75 - 110 GHz) are attractive for the generation of local-oscillator (LO) power for super-heterodyne receivers operating at sub-millimetre wave frequencies, as needed for example in future space instruments for Earth observation. Apart from space applications there is a growing interest for these devices in...
conference paper 2012
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Miorali, M. (author), Slob, E.C. (author), Arts, R.J. (author)
In this paper we present laboratory experiments where we address the Ground Penetrating Radar (GPR) capability of monitoring oil displacement processes in porous media. This has significant applications in near-subsurface environments where remediation of contaminant such as oil-derived liquids is considered one of the major technical,...
conference paper 2011
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Theil, A. (author), Schouten, M.W. (author), de Jong, A.J. (author), TNO Defensie en Veiligheid (author)
A wind turbine placed in the vicinity of a primary radar system (PSR) can impact the performance of that system. This paper discusses criteria by which wind turbine placement can be assessed. The effects considered are desensitization overhead and shadowing. The criteria have been implemented in a wind turbine acceptance program that is going to...
conference paper 2010
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Miorali, M. (author), Slob, E.C. (author), Arts, R.J. (author), TNO Bouw en Ondergrond (author)
A technique capable of capturing the dynamic of the reservoir fluids in the proximity of production wells would provide enormous benefit to the reservoir management; in fact, monitoring can be used to develop a feedback loop between measurements and control technologies to optimize the production. This paper examines the feasibility of a...
conference paper 2009
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TNO Defensie en Veiligheid (author), Ranada Shaw, A. (author), Gorriti, A. (author), Schoolderman, A.J. (author), Rhebergen, J.B. (author)
In this paper results are presented of a study on the performance of a dual-sensor landmine detector and its dependency on soil moisture. The detector was used on a trial site in the K5 mine belt in Cambodia. Soil samples were taken from the trial lane, as well as GPR measurements. The data obtained from these soil samples and field measurements...
conference paper 2006
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Kovalenko, V. (author), Yarovoy, A. (author), Ligthart, L.P. (author), Hakkaart, P. (author), Rhebergen, J.B. (author), TNO Defensie en Veiligheid (author)
The results of the measurement campaign held during the autumn of 2004 in a sand pit located at the TNO-DS&S (formerly known as TNO Physics and Electronics Laboratory (FEL)) GPR test facility "Waalsdorp" in The Hague, The Netherlands, are presented. Some contamination of the sand in the pit with small scatterers (e.g. sea shells) comparable in...
conference paper 2005
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TNO Defensie en Veiligheid (author), de Hek, A.P. (author), van der Bent, G. (author), van Wanum, M. (author), van Vliet, F.E. (author)
An X-band power amplifier chip-set for communication and radar applications has been developed and tested. The chip set consists of a two- and three-stage high-power amplifier, which have an output power of 10 Watt over the 8.5 - 10.5 GHz frequency band and a driver amplifier with an output power of more than 1 Watt over the 8.5 - 11.5 GHz...
conference paper 2005
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TNO Defensie en Veiligheid (author), Rhebergen, J.B. (author), Ralston, J.M. (author)
With the emergence of commercially available multisensor mine detection systems, the need for standardised test and evaluation procedures becomes more pressing. For metal detectors this already has been established and is laid down in the CEN workshop document CWA14747:2003 [1]. The ITEP multisensor working group has taken the first step towards...
conference paper 2005
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Rhebergen, J.B. (author), van Wijk, R. (author)
During the past couple of years, several GPR data sets have been acquired at the TNO-FEL test-site "Waalsdorp". Simultaneously a detection algorithm, based on autoregressive modelling has been developed and implemented. This algorithm first determines a measure of the information content of data from known mine locations, by means of minimum...
conference paper 2004
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Milisavljević, N. (author), Bloch, I. (author), van den Broek, S.P. (author), Acheroy, M. (author), TNO Fysisch en Elektronisch Laboratorium (author)
A methodfor modeling andcombination of measures extractedfrom a ground-penetrating radar (GPR) in terms of belief functions within the Dempster-Shafer framework is presentedandillustratedon a real GPR data set. A starting point in the analysis is a preprocessed C-scan of a sand-lane containing some mines andfalse alarms. In order to improve the...
article 2003
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TNO Fysisch en Elektronisch Laboratorium (author), Hendrickx, J.M.H. (author), van Dam, R.L. (author), Borchers, B. (author), Curtis, J. (author), Lensen, H.A. (author), Harmon, R. (author)
Ground penetrating radar and thermal sensors hold much promise for the detection of non-metallic land mines. In previous work we have shown that the performance of ground penetrating radar strongly depends on field soil conditions such as texture, water content, and soil-water salinity since these soil parameters determine the dielectric soil...
conference paper 2003
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TNO Fysisch en Elektronisch Laboratorium (author), Miller, T.W. (author), Borchers, B. (author), Hendrickx, J.M.H. (author), Hong, S.H. (author), Lensen, H.A. (author), Schwering, P.B.W. (author), Rhebergen, J.B. (author)
Soil surface temperatures not only exhibit daily and annual cycles but also are very variable in space and time. Without knowledge of the spatial and temporal variability of soil surface temperatures, it will be difficult to determine what times of day are most suitable for mine detection using Thermal Infra Red (TIR) technology. In this study...
conference paper 2002
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