Searched for: subject:"Frequency%5C+modulation"
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de Martin, L. (author), van Rossum, W. (author), Ribeiro, D. (author), Anitori, L. (author)
It is well known that noise-like waveforms have the inherent property of suppressing ambiguities due to their nonrepetitive nature, as opposed to the more classical linear frequency modulated (LFM) pulsed waveforms. This aperiodicity also improves the robustness against jammers, making these waveforms harder to detect and classify by an enemy....
article 2020
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van Es, M.H. (author), Sadeghian Marnani, H. (author)
Scanning Subsurface Ultrasonic Force Microscopy (SSURFM) relies on a change in the sensing cantilever’s resonance frequency to detect subsurface structures through their mechanical properties. It gains sensitivity both from exploiting the cantilevers large dynamical stiffness at high frequency and from using the sensitivity of the shifting...
other 2019
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Keyvani Janbahan, A. (author), van Reijzen, M.E. (author), Tamer, M.S. (author), van Es, M.H. (author), van Riel, M.C.J.M. (author), Sadeghian Marnani, S. (author), van der Lans, M.J. (author)
public lecture 2019
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van Reijzen, M.E. (author), Tamer, M.S. (author), van Es, M.H. (author), van Riel, M.C.J.M. (author), Keyvani Janbahan, A. (author), Sadeghian Marnani, S. (author), van der Lans, M.J. (author)
In this paper, we present an AFM based subsurface measurement technique that can be used for overlay and critical dimensions (CD) measurements through optically opaque layers. The proposed method uses the surface elasticity map to resolve the presence and geometry of subsurface structures. To improve the imaging performance of the AFM based...
conference paper 2019
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Keyvani Janbahan, A. (author), Tamer, M.S. (author), van Es, M.H. (author), van der Lans, M.J. (author)
Elasticity based Sub- surface Atomic Force Microscopy is a promising metrology solution for CD measurements, defect characterization and alignment and overlay applications.
other 2019
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Yepes, C. (author), Gandini, E. (author), Dijk, R.V. (author), Bruning, F. (author), Maalderink, H. (author), Monni, S. (author), van Vliet, F.E. (author)
A 24 GHz antenna design for miniaturized FMCW radar is presented. The antenna was manufactured with additive manufacturing technology at TNO. The characterization of the polymer material used in the fabrication was carried out and the measurement results of the antenna are presented in this work. A good agreement between simulations and...
conference paper 2018
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Bryllert, T. (author), Svedin, J. (author), Karlsson, M. (author), Gandini, E. (author), Llombart, N. (author), Drakinskiy, V. (author), Stake, J. (author)
We present a 220 GHz imaging radar prototype that has been developed in the European Defense Agency (EDA) project TIPPSI. The purpose of the development was to demonstrate short-range high-resolution 3D imaging for security applications at checkpoints, and to guide the development of stand-off real-time millimeter wave and sub-millimeter wave...
conference paper 2018
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Ba, A. (author), van den Heuvel, J. (author), Mateman, P. (author), Zhou, C. (author), Busze, B. (author), Song, M. (author), He, Y. (author), Ding, M. (author), Dijkhuis, J. (author), Tiurin, E. (author), Madampu, S. (author), Boer, P. (author), Traferro, S. (author), Zhang, Y. (author), Liu, Y.-H. (author), Bachmann, C. (author), Philips, K. (author)
A WiFi (IEEE 802.11g) and BLE combo transmitter (TX) for IoT applications is presented. A wideband digital polar architecture consisting of an all-digital PLL-based frequency modulator and a switched-capacitor digitally-controlled PA achieves optimal energy efficiency for both WiFi and BLE. The dynamic FM correction and AM alias suppression...
conference paper 2018
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Yepes, J.C. (author), Gandini, E. (author), van Dijk, R. (author), Bruning, F. (author), Maalderink, H. (author), Morini, S. (author), van Vliet, F.E. (author)
A 24 GHz antenna design for miniaturized FMCW radar is presented. The antenna was manufactured with additive manufacturing technology at TNO. The characterization of the polymer material used in the fabrication was carried out and the measurement results of the antenna are presented in this work. A good agreement between simulations and...
conference paper 2018
document
Dekker, B. (author), Jacobs, S. (author), Kossen, A.S. (author), Kruithof, M.C. (author), Huizing, A.G. (author), Geurts, M. (author)
Gesture recognition with radar enables remote control of consumer devices such as audio equipment, television sets and gaming consoles. In this paper, experimental results of hand gesture recognition with a low power FMCW radar and a deep convolutional neural network (CNN) are presented. The FMCW radar operates in the 24 GHz ISM frequency band...
conference paper 2017
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Wittekind, D. (author), Tougaard, J. (author), Stilz, P. (author), Dähne, M. (author), Clark, C.W. (author), Lucke, K. (author), von Benda-Beckmann, A.M. (author), Ainslie, M.A. (author), Siebert, U. (author)
We estimated the long-range effects of air gun array noise on marine mammal communication ranges in the Southern Ocean. Air gun impulses are subject to significant distortion during propagation, potentially resulting in a quasi- continuous sound. Propagation modeling to estimate the received waveform was conducted. A leaky integrator was used as...
bookPart 2016
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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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van der Graaf, M.W. (author), Otten, M.P.G. (author), Huizing, A.G. (author), Tan, R.G. (author), Caro Cuenca, M. (author), Ruizenaar, M.G.A. (author)
An X-band Digital Array Synthetic Aperture Radar for a Short Range Tactical UAV is presented. This system is demonstrated on a manned helicopter and motor glider. The Frequency Modulated Continuous Wave radar principle in combination with digital beam forming over 24 receive channels is used to meet the stringent payload requirements of Tactical...
conference paper 2013
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Itcia, E. (author), Wasselin, J.P. (author), Mazuel, S. (author), Otten, M.P.G. (author), Huizing, A.G. (author)
Rockwell Collins France (RCF) radar department is currently developing, in close collaboration with TNO in The Hague, The Netherlands, a Frequency Modulated Continuous Wave (FMCW) radar sensor dedicated to Obstacle Warning function and potentially to air traffic detection. The sensor combines flood light illumination and digital beam forming to...
conference paper 2013
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Belfiori, F. (author), van Rossum, W.L. (author), Hoogeboom, P. (author)
This paper investigates the use of a 2D MUSIC algorithm for the joint estimation of angular and range target locations. Coherency and correlation characteristics of the target signals are taken into account and 2D spatial smoothing technique is preliminarily applied in order to ensure the non-singularity of the received signals covariance matrix...
conference paper 2012
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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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Kastelein, R.A. (author), de Haan, D. (author), Verboom, W.C. (author), TNO Defensie en Veiligheid (author)
It is unclear how well harbor porpoises can locate sound sources, and thus can locate acoustic alarms on gillnets. Therefore the ability of a porpoise to determine the location of a sound source was determined. The animal was trained to indicate the active one of 16 transducers in a 16-m -diam circle around a central listening station. The...
article 2007
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Meta, A. (author), Hoogeboom, P. (author), Ligthart, L.P. (author)
The combination of frequency-modulated continuous-wave (FMCW) technology and synthetic aperture radar (SAR) techniques leads to lightweight cost-effective imaging sensors of high resolution. One limiting factor to the use of FMCW sensors is the well-known presence of nonlinearities in the transmitted signal. This results in contrast- and range...
article 2007
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Meta, A. (author), Hoogeboom, P. (author), Ligthart, L.P. (author)
The combination of Frequency Modulated Continuous Wave (FMCW) technology and Synthetic Aperture Radar (SAR) leads to lightweight, cost-effective imaging sensors of high resolution. In FMCW SAR applications the conventional stop-and-go approximation used in pulse radar algorithms can be not valid anymore, therefore the motion within the sweep...
conference paper 2006
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de Wit, J.J.M. (author), Meta, A. (author), Hoogeboom, P. (author), TNO Defensie en Veiligheid (author)
The combination of compact frequency-modulated continuous-wave (FM-CW) technology and high-resolution synthetic aperture radar (SAR) processing techniques should pave the way for the development of a lightweight, cost-effective, high-resolution, airborne imaging radar. Regarding FM-CW SAR signal processing, the motion during the transmission of...
article 2006
Searched for: subject:"Frequency%5C+modulation"
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