Searched for: subject%3A%22MIMO%22
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van Dael, M. (author), Witvoet, G. (author), Swinkels, B. (author), Pinto, M. (author), Casanueva, J. (author), Bersanetti, D. (author), Mantovani, M. (author), Vardaro, M. (author), Oomen, T. (author)
Gravitational Wave detectors require feedback control to control the length between the sensitive components of the detector. The degrees of freedom in the control system are inherently coupled and the level of interaction furthermore varies over time. A systematic control design approach for the feedback controllers is presented which provides...
article 2022
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Alistarh, C. (author), Anitori, L. (author), van Rossum, W.L. (author), Podilchak, S.K. (author), Thompson, J. (author), Sellathurai, M. (author)
conference paper 2022
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Valcke, S. (author), Moorlag, W. (author), Aalbersberg, M. (author)
In deze paper laten we zien hoe dat kan als je informatie over lokaal beschikbare, meer milieuvriendelijke grondstoffen centraal zet in het ontwerpproces: resource based engineering. Het doel van dit paper is om te laten zien dat er een nieuwe aanpak voorhanden is voor een duurzamere betonsector, een samenspel tussen data, materiaalmodellen en...
report 2022
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Alistarh, C. (author), Anitori, L. (author), Podilchak, S.K. (author), Thompson, J. (author), Hilario, P.D. (author), Sellathurai, M. (author), Goussetis, G. (author), Lee, J. (author)
Automotive engineers are repeatedly faced with the issue of choosing radars with the best angular resolution while having reduced processing times. In this paper, a novel extrapolation method is presented to estimate the amplitudes and phases for virtual antenna elements at the receiver periphery. This method has shown to resolve two targets...
conference paper 2021
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Braam, S. (author), Litjens, R. (author), Smulders, P. (author), Ijntema, W. (author)
We present a simulation-based assessment of the performance potential of distributed MIMO (D-MIMO), multi-user MIMO (MU-MIMO) and particularly the combined D/MU-MIMO operation, for which we extend previously published scheduling and beamforming principles. The assessment study reveals that, when optimizing average user throughput performance, D...
conference paper 2020
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van Rossum, W. (author), Anitori, L. (author)
In this article a novel waveform, Random SlowTime Code Division Multiple Access (ST-CDMA) for MIMO radar is presented and investigated. ST-CDMA means that the waveforms of the different transmitters are orthogonal per burst, while conventional CDMA implies orthogonal waveforms of the different transmitters per pulse. In particular, the Doppler...
conference paper 2018
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Withagen, J.C.J.G. (author), Annema, A.J. (author), Nauta, B. (author), van Vliet, F.E. (author)
Multiple-Input and Multiple-Output (MIMO) arrays provide more degrees of freedom than conventional phased arrays. They require that every transmitting element of the array can be identified when received. One way to achieve this is to give every element its own unique frequency. Offset-transmitters may be used to introduce MIMO or Doppler...
conference paper 2016
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van Rossum, W. (author), Huizing, A. (author)
In a phased array radar which uses Multiple Input Multiple Output (MIMO) techniques, each (group of) element(s) transmits a different waveform. This extra degree of freedom in the design of a phased array radar potentially yields an advantage for improved suppression of sidelobe clutter and jamming. In this paper a Space-Time Block Coding (STBC)...
conference paper 2015
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Belfiori, F. (author), van Rossum, W. (author), Hoogeboom, P. (author)
A coherent two-dimensional (2D) multiple signal classification (MUSIC) processing for the simultaneous estimation of angular and range target positions has been presented. A 2D spatial smoothing technique is also introduced to cope with the coherent behaviour of the received echoes, which may result in a rank deficiency of the signals covariance...
article 2014
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van Dorp, P. (author)
In this paper, a new signal processing technique for Multiple-Input Multiple-Output (MIMO) image processing of a Linear Frequency-Modulated Continuous Wave (LFMCW) automotive radar was developed. The image is the range-speed-direction data cube. The technique comprises two improvements to the standard MIMO image processing: 1) A fast unambiguous...
conference paper 2013
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van Dorp, P. (author)
In this paper, a new signal processing technique for Multiple-Input Multiple-Output (MIMO) image processing of a Linear Frequency-Modulated Continuous Wave (LFMCW) automotive radar was developed. The image is the range-speed-direction data cube. The technique comprises two improvements to the standard MIMO image processing: 1) A fast unambiguous...
conference paper 2013
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van Rossum, W.L. (author), de Wit, J.J.M. (author), Tan, R.G. (author)
At TNO an innovative concept to obtain inside building awareness with stand-off, through-the-wall radar has been developed: SAPPHIRE. The system concept exploits particular phase behavior in the 3D radar data to extract dominant scatterers inside a building. These scatterers can be reconstructed from the data using an overcomplete dictionary and...
conference paper 2012
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Belfiori, F. (author), van Rossum, W. (author), Hoogeboom, P. (author)
The authors present a 2D-MUSIC processing for the simultaneousestimation of angular and range target positions. A2D spatial smoothing technique is also introduced in orderto cope with the coherent behavior of the received echoes, which may result in a rank deficiency of the signals covariancematrix. The algorithm is analyzed with respect to its...
conference paper 2012
document
Belfiori, F. (author), van Rossum, W. (author), Hoogeboom, P. (author)
In this paper we present a technique to estimate the calibration coefficients of a coherent Multiple-Input Multiple-Output (MIMO) array radar built on a printed circuit board (PCB). Due to the integrated structure and the MIMO nature of the system, a direct measurement of each antenna element behavior cannot be performed. The proposed method is...
conference paper 2012
document
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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Belfiori, F. (author), Maas, A.P.M. (author), Hoogeboom, P. (author), van Rossum, W.L. (author)
The work presented in this paper was aimed at the design of a compact radar device to be used for private area surveillance applications. The radar is connected to a pan tilt zoom camera and it provides the camera system with high accuracy position information (bearing and range) of moving targets; in this way the camera can be steered to the...
conference paper 2011
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Belfiori, F. (author), Anitori, L. (author), van Rossum, W.L. (author), Otten, M.P.G. (author), Hoogeboom, P. (author)
The paper presents different processing schemes that have been investigated in order to evaluate the direction of arrival (DOA) with a multiple-input multiple-output (MIMO) radar. Conventional digital beam forming (DBF) and super resolution algorithm (MUSIC) have been applied. The results provided by them have been compared with a compressive...
conference paper 2011
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Belfiori, F. (author), van Rossum, W.L. (author), Peter Hoogeboom, P. (author)
Multiple-input-multiple-output (MIMO) processing is a consolidated technique in communication systems thanks to the benefits that it offers in multipath fading environments. In recent years, studies have shown how the performances of conventional phased-array radar can be improved by using the same approach. This letter illustrates how the...
article 2011
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Deiana, D. (author), Kossen, A.S. (author), van Rossum, W.L. (author), TNO Defensie en Veiligheid (author)
Surveillance in an urban environment under all atmospheric conditions and situations can be performed by means of radars. The multipath created by buildings and moving targets can be exploited, for example in order to increase SNR. In this paper we present the initial results of the measurements of a moving target in a roadblock scenario in non...
conference paper 2010
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Li, P. (author), Zhang, H. (author), Oostveen, J. (author), Fledderus, E. (author), TNO Informatie- en Communicatietechnologie (author)
In this paper, the sensitivity of the error rate performance of MIMO-OFDM-based practical systems (WiMAX and LTE) to wide band channel properties is investigated. The behavior of the wideband channel is characterized in terms of delay spread (DS) and angular spread (AS). The impacts of DS and AS on the system performance are addressed with both...
conference paper 2010
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