Searched for: author:"de Wit, J.J.M."
(1 - 20 of 47)

Pages

document
Klein, K.T.J. (author), Uysal, F. (author), Caro Cuenca, M. (author), Otten, M.P.G. (author), de Wit, J.J.M. (author)
Continuous navigation is crucial for small drones when flying a pre-planned route or during autonomous flight. In scenarios where a global positioning system (GPS) signal is unavailable, drift in the onboard sensors causes the inertial navigation system (INS) to quickly deviate from the planned route. This paper proposes a radar-aided navigation...
conference paper 2021
document
de Jong, R.J. (author), de Wit, J.J.M. (author), Uysal, F. (author)
In the defence and security domain, camera systems are widely used for surveillance. The major advantage of using camera systems for surveillance is that they provide high‐resolution imagery, which is easy to interpret. However, the use of camera systems and optical imagery has some drawbacks, especially for application in the military domain....
article 2021
document
Klein, K.T.J. (author), Uysal, F. (author), Caro Cuenca, M. (author), Otten, M.P.G. (author), de Wit, J.J.M. (author)
In this paper, a wire detection algorithm is proposed for synthetic aperture radar (SAR) images. The algorithm is specifically designed for SAR images generated from an agile, drone-mounted, omnidirectional radar array to be used for the detection of improvised explosive devices (IEDs). A multistage approach consisting of denoising, constant...
conference paper 2020
document
de Wit, J.J.M. (author), Gusland, D. (author), Trommel, R.P. (author)
The use of drones grows rapidly, recreational and commercial use, as well as malicious use. Following the trend of increasing use, there is an increasing need for radar systems to detect, track and characterize drones. Drone characterization, i.e., extracting information about the payload and intent of a drone, is crucial for the effective...
conference paper 2020
document
Huizing, A.G. (author), Heiligers, M.J.C. (author), Dekker, B. (author), de Wit, J.J.M. (author), Cifola, L. (author), Harmanny, R. (author)
article 2019
document
de Jong, R.J. (author), Heiligers, M.J.C. (author), de Wit, J.J.M. (author), Uysal, F. (author)
Camera systems are widely used for surveillance in the security and defense domains. The main advantages of camera systems are their high resolution, their ease of use, and the fact that optical imagery is easy to interpret for human operators. However, particularly when considering application in the defense domain, cameras have some...
conference paper 2019
document
Premel-Cabic, G. (author), de Wit, J.J.M. (author), Cuenca, M. Caro (author)
The ALFA project aims at timely detection, tracking, classification, and intent assessment of LSS targets. The system relies on a heterogeneous sensor suite, including radar. The objective of the radar component is sector surveillance including target classification. Since the revisit time needs to be short, classification must be done with very...
conference paper 2019
document
de Wit, J.J.M. (author), van Rossum, W.L. (author)
A sensor network has been developed consisting of four RF nodes that automatically set up a network organization and synchronize wirelessly. In the system bistatic backscatter and forward scatter radar measurements are combined. For detection of small and slow targets, like humans, suppression of the background including the direct signals...
conference paper 2018
document
de Wit, J.J.M. (author), van Rossum, W.L. (author)
Through-wall radar offers capabilities that allow an important contribution to inside-building awareness, such as target detection and tracking. However, reliable radar tracking of people inside a building is not a trivial task. In monostatic operation, radar measures the backscatter from people inside a building. The backscatter of people is...
conference paper 2017
document
de Wit, J.J.M. (author), van Rossum, W.L. (author), Blacknell, D. (author), Muff, D. (author)
article 2017
document
van Rossum, W.L. (author), de Wit, J.J.M. (author)
Through-wall radar allows for remote intelligence of building interiors including stand-off detection and tracking of persons inside a building. However, reliable radar tracking of people inside a building is not trivial. Conventional, monostatic through-wall radar measures the backscatter of moving people. The backscatter from a human is...
article 2017
document
van Rossum, W.L. (author), Anitori, L. (author), van Dorp, P. (author), de Wit, J.J.M. (author), Harmanny, R.I.A. (author)
conference paper 2017
document
de Wit, J.J.M. (author), van Rossum, W.L. (author)
Automated extraction of building features is a great aid in synthesizing building maps from radar data. In this paper, a model-based method is described to detect and classify canonical scatters, such as corners and planar walls, inside a building. Once corners and walls have been located, a building map can be synthesized. To detect and...
article 2016
document
Harmanny, R.I.A. (author), de Wit, J.J.M. (author), Prémel-Cabic, G. (author)
The radar micro-Doppler signature of a target is determined by parts of the target moving or rotating in addition to the main body motion. The relative motion of these parts is characteristic for different classes of targets, e.g. the flapping motion of a bird’s wings versus the spinning of propeller blades. In the present study, the micro...
article 2015
document
Molchanov, P. (author), Harmanny, R.I.A. (author), de Wit, J.J.M. (author), Egiazarian, K. (author), Astola, J. (author)
The popularity of small unmanned aerial vehicles (UAVs) is increasing. Therefore, the importance of security systems able to detect and classify them is increasing as well. In this paper, we propose a new approach for UAVs classification using continuous wave radar or high pulse repetition frequency (PRF) pulse radars. We consider all steps of...
article 2014
document
Rossum, W.L. (author), de Wit, J.J.M. (author)
There are several scenarios for which it is desirable to obtain the layout of a building interior using outside radar sensing and surveillance. These situations may arise after an earthquake, when a building might become unstable or when the building entrance is blocked in hostage taking or criminal acts by outlaws. In this chapter, several...
bookPart 2014
document
Harmanny, R.I.A. (author), de Wit, J.J.M. (author), Prémel Cabic, G. (author)
The radar micro-Doppler signature of a target is determined by parts of the target moving or rotating in addition to the main body motion. The relative motion of parts is characteristic for different classes of targets, e.g. the flapping motion of a bird's wings vs. the spinning of propeller blades. In the present study, the micro-Doppler...
conference paper 2014
document
de Wit, J.J.M. (author), Harmanny, R.I.A. (author), Molchanov, P. (author)
Abstract—The micro-Doppler spectrogram depends on parts of a target moving and rotating in addition to the main body motion (e.g., spinning rotor blades) and is thus characteristic for the type of target. In this study, the micro-Doppler spectrogram is exploited to distinguish between birds and small unmanned aerial vehicles (UAVs). The focus...
conference paper 2014
document
Otten, M.P.G. (author), van Rossum, W.L. (author), Tan, R. (author), Vlothuizen, W.J. (author), de Wit, J.J.M. (author)
A lightweight radar system, suitable for use on board small airborne platforms, has been built and tested. The radar system comprises a digital receive array, offering full beam forming flexibility at the cost of high data rates and heavy processing loads. In this paper, the requirements and architecture for multi-channel SAR processing are...
conference paper 2013
document
de Wit, J.J.M. (author), van Rossum, W.L. (author), Miller, R.J. (author), Hyde, L. (author)
Radar systems suitable for stand-off mapping of building structures and through-wall surveillance allow covert reconnaissance of buildings and surveillance of people inside in support of e.g. police raids or search and rescue operations. In this paper the operational concept will be outlined for a multifunction radar system capable of stand-off...
conference paper 2013
Searched for: author:"de Wit, J.J.M."
(1 - 20 of 47)

Pages