Searched for: subject%3A%22Radio%22
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Stephan, U. (author), Steinke, O. (author), Ushakov, A. (author), Verlaan, A.L. (author), Yatsuka, E. (author), Yokoyama, M. (author), Rijfers, A. (author), C.A. Ribeiro, D. (author), Moser, L. (author), Bassan, M. (author), Maniscalco, M.P. (author), van Beekum, E.R.J. (author), Hatae, T. (author)
The ITER Edge Thomson scattering system provides measurements of the electron temperature and density profiles at the periphery plasma of the ITER tokamak for physics studies and advanced plasma control. The frontend of the system contains a relatively large 23 cm × 25.8 cm metal first mirror (FM). Radio-frequency plasma is considered to remove...
article 2022
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Marinovic, T. (author), de Villiers, D.I.L. (author), Bekers, D.J. (author), Johansson, M.N. (author), Stjernman, A. (author), Maaskant, R. (author), Vandenbosch, G.A.E. (author)
A new method is proposed to analyze antenna arrays including mutual coupling (MC), which is based on the concept of multiple scattering, and relates to the iterative Jacobi and Gauss–Seidel methods. The method employs sampled far-field data of an isolated element, which can be obtained by any full-wave simulator and consists of far fields for...
conference paper 2021
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Arora, A. (author), Dimitrovski, T. (author), Litjens, R. (author), Zhang, H. (author)
conference paper 2021
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Liu, Y.Y. (author), Philips, S.G.J. (author), Orona, L.A. (author), Samkharadze, N. (author), McJunkin, T. (author), Macquarrie, E.R. (author), Eriksson, M.A. (author), Vandersypen, L.M.K. (author), Yacoby, A. (author)
article 2021
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de Boer, H. (author), Muller, R.W.D. (author), Wong, S. (author), Voogt, V. (author)
A key obstacle within the design of cognitive radios has always been the spectrum sensing component that implements the function automatic modulation classification (AMC). With the transition to software-defined radios (SDRs) followed by the introduction of field-programmable gate arrays (FPGAs) and deep learning (DL), it becomes possible to...
conference paper 2021
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Ushakov, A. (author), Verlaan, A.L. (author), Stephan, U. (author), Steinke, O. (author), de Bock, M. (author), Maniscalco, M.P. (author), Verhoeff, P. (author)
The Visible Spectroscopy Reference System (VSRS.55.E6) is going to be one of the first optical diagnostics in the ITER tokamak chamber. For the VSRS diagnostic system, the 100 mm diameter first mirror (FM) located at the front end of the optical system is expected to experience contamination primarily with beryllium and tungsten. Small levels of...
article 2020
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Ushakov, A. (author), Stephan, U. (author), Steinke, O. (author), Verlaan, A.L. (author), de Bock, M. (author), Maniscalco, M.P. (author), Verhoeff, P. (author)
The Visible Spectroscopy Reference System (VSRS.55.E6) is going to be one of the first optical diagnostics in the ITER tokamak. The VSRS front-end part shall contains the 100 mm diameter first mirror (FM). The FM is expected to experience contamination with beryllium and tungsten. Levels of contamination on the order of 10 nm degrade the FM...
conference paper 2020
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Raftopoulou, M. (author), Jorguseski, L. (author), Litjens, R. (author)
We design and assess novel random access (RA) procedures for use in 5G radio access networks in support of machine-type applications requiring Ultra-Reliable Low-Latency Communications (URLLC). In a simulation-based performance assessment the proposed RA procedures are compared against LTE Cat-M1 (or LTE-M), the current LTE-based access...
conference paper 2019
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Papadopoulos, N. (author), Qiu, W. (author), Ameys, M. (author), Smout, S. (author), Willegems, M. (author), Deroo, F. (author), van der Steen, J.L. (author), Kronemeijer, A.J. (author), Dehouwer, M. (author), Mityashin, A. (author), Gehlhaar, R. (author), Myny, K. (author)
Capacitive touchscreens are increasingly widespread, featuring in mobile phones and tablets, as well as everyday objects such as cars and home appliances. As a result, the interfaces are uniquely placed to provide a means of communication in the era of the Internet of Everything. Here, we show that commercial touchscreens can be used as reader...
article 2019
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Ushakov, A. (author), Verlaan, A.L. (author), Ebeling, R.P. (author), Wu, C.C. (author), O'Neill, R. (author), Smith, M. (author), Stratton, B. (author), Koster, N.B. (author), Gattuso, A. (author), Lasnier, C.J. (author), Feder, R. (author), Maniscalco, M.P. (author), Verhoeff, P. (author)
One of the important aspects of the service life of the first and second optical mirrors (FM and SM) in ITER UWAVS diagnostics is to understand the influence of plasma cleaning on materials re-deposition and optical surface quality after multiple cleaning cycles. The capacitively coupled RF 30-60 MHz system is a candidate for the UWAVS mirror...
article 2019
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Post, B. (author), Borst, S. (author), van den Berg, J.L. (author)
Network densification has emerged as a powerful paradigm to boost spectral efficiency and accommodate the continual rise in demand for wireless capacity. In dense cell deployments however, overlapping coverage areas may cause highly varying interference conditions among different cells. Moreover, denser networks experience more temporal load...
conference paper 2019
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Fockens, T.W.H. (author), Zwamborn, A.P.M. (author), Leferink, F. (author)
Radio noise of man-made origin has been measured and studied since the 50s of the past century. From that time on, especially in the last two decades, the electromagnetic environment has changed due to the wide spread and increasingly complicated electronic and computing equipment in domestic and work premises. Not only the character of man-made...
article 2019
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van der Bent, G. (author), de Hek, P. (author), van Vliet, F.E. (author)
The application of stacked-FETs in power ampli fiers allows for a supply voltage higher than supported by the breakdown voltage of a single transistor. Potential benefits of the increased supply voltage are reduced supply currents and a lower matching ratio at the output of the amplifier. Furthermore, an increased output power per chip area is...
article 2019
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Pacini, F. (author), Paoli, G. (author), Cayón, I. (author), Rivera, T. (author), Sarmiento, B. (author), Kebkal, K. (author), Kebkal, O. (author), Kebkal, V. (author), Geelhoed, J. (author), Schipperijn, B. (author), Dol, H.S. (author), Skogseth, T. (author)
The management of a heterogeneous mix of underwater vehicles needs a robust and reliable communication network, able to connect the remote command and control station (typically ashore or on board of a support ship) with nodes and vehicles in the deep sea. on the basis of this scenario, the infrastructure shall satisfy requirements such as:...
conference paper 2018
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Saathof, R. (author), Crowcombe, W.E. (author), Kuiper, S. (author), van der Valk, N.C.J. (author), Pettazzi, F. (author), de Lange, T.J. (author), Kerkhof, P.J. (author), van Riel, M.C.J.M. (author), de Man, H. (author), Truyens, D.C. (author), Ferrario, I. (author)
Optical communications will complement radio frequency (RF) communications in the coming decades to enhance throughput, power efficiency and link security of satellite communication links. To enable optical communications technology for intersatellite links and (bi-directional) ground to satellite links, TNO develops a suite of technologies in...
conference paper 2018
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Heertje, E. (author), Holtzer, A.C.G. (author), Janssen, A. (author), Overduin, R. (author)
Defensie staat aan de vooravond van de modernisering van de huidige tactische communicatiesystemen, waaronder het vervangen van de oude tactische radio’s door een nieuwe generatie middelen (Foxtrot/Tactische Draadloze Connectiviteit). Nederlandse eenheden moeten tot op laag-tactische niveaus met coalitiepartners kunnen optreden en met hen op dat...
article 2018
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Tavakoli, R. (author), Nabi, M. (author), Basten, T. (author), Goossens, K. (author)
The IEEE 802.15.4 Time-Slotted Channel Hopping (TSCH) protocol defines two types of timeslots for communications, namely dedicated and shared timeslots. An upper layer in the protocol stack uses these timeslots to design a communication schedule for the network links, based on the required bandwidth for each link. Considering a network with time...
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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Ushakov, A. (author), Verlaan, A.L. (author), Ebeling, R.P. (author), Rijfers, A. (author), O'Neill, R. (author), Smith, M. (author), Stratton, B. (author), Koster, N.B. (author), van der List, J.F.M. (author), Gattuso, A. (author), Lasnier, C.J. (author), Feder, R. (author), Maniscalco, M.P. (author), Verhoeff, P. (author)
In ITER, first mirrors for the Upper Wide Angle Viewing System (UWAVS) are expected to experience contamination with beryllium and tungsten. Contamination levels of 10 nm can degrade mirror performance. In the UWAVS, a first mirror cleaning system will use radio-frequency (RF) gas discharge. A mockup in representative geometry was developed. The...
article 2018
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Ushakov, A. (author), Verlaan, A.L. (author), Ebeling, R.P. (author), Rijfers, A. (author), O'Neill, R. (author), Smith, M. (author), Stratton, B. (author), Koster, N.B. (author), van der List, J.F.M. (author), Gattuso, A. (author), Lasnier, C.J. (author), Feder, R. (author), Maniscalco, M.P. (author), Verhoeff, P. (author)
First metallic mirrors used in optical diagnostics such as the Upper Wide Angle Viewing System (UWAVS) in ITER may undergo contamination with beryllium and tungsten. Contamination levels of 10 nm can significantly degrade mirror performance. A UWAVS first mirror cleaning system prototype uses radio-frequency (RF) gas discharge to remove...
article 2018
Searched for: subject%3A%22Radio%22
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