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During the last decade, numerous developments have not only improved and matured technology and signal processing methods of RADAR systems, but also paved the road for many new applications besides its traditional domains in defence and space. The rapid progress in performance of highly integrated electronic components (digital, analogue or mixed-signal) has enabled several trends such as miniaturization...
Millimetre-wave radars at 70GHz are already in mass production for automotive systems but current system aspirations for higher frequencies and for ever-more-cost-effective systems mean that continued advances are required, both in production techniques, and in the development work needed to support them. Particular challenges arise in domains where monolithic integrated circuits cannot (yet) provide...
The potential of the Low THz spectrum for high resolution imaging applications such as automotive radar is described. Outdoor experiments require compact and portable equipment which may be achieved by extending the operation of current battery powered vector network analyzers. The development of a hybrid 670 GHz VNA based radar is described including instrument performance data.
Photonics based oscillators generate mm-wave signals with high spectral purity at frequencies as high as 100 GHz, and beyond. The use of optical components provides the added benefit of reduced size and power consumption, while maintaining low phase noise. This paper reviews the basis of the optoelectronic techniques on which photonics oscillators are based, and provides a review for the latest advances...
This paper summarizes the achievements of the TanDEM-X mission with respect to its main mission goal as well as to its secondary mission objectives. While the primary mission goal has been the generation of a new global digital elevation model (DEM) of the Earth's surface with unprecedented accuracy, a variety of secondary objectives have been defined which constitute an important asset of this challenging...
In this paper, we analyze the characteristics of the radio frequency interference (RFI) data in the time-frequency domain. A matching pursuit (MP) method is proposed for RFI suppression in ultra-wideband synthetic aperture radar (UWB-SAR) system. The algorithm decomposes the SAR echo over a modified Gabor dictionary to remove the significant RFI. The performance for the algorithm is investigated by...
This paper presents a task priority assignment model based on Gaussian Process (GP) multitask classification which resolve the problem of phased array radar resource scheduling in complex electromagnetic environment. According to the work mode and task of the phased array radar, a task model on GP multitask classifier was established and used to preprocess the factors of amount, position of geometry...
In this paper, the connection between polarization properties of radar receiveing antennas and deformation/vibration of scattering rain-drops is studied. The mathematical modeling and computer simulation are made to prove that it is possible to influence onto the contribution of a vibration component into the receiving signal by selection of polarization angle of receiving antenna. The results of...
This paper reports the exploration of the potential of enhanced target classification through feature extraction for anti-personnel (AP) mine detection using handheld ground penetrating radar (GPR). Principal component analysis (PCA) using singular value decomposition (SVD) of the Jacobian matrix is used to determine the ability of a bistatic handheld GPR/metal detector system to detect the presence...
The detection and defense of Unmanned Aerial Systems (UAS) is becoming increasingly important for the protection of public and private areas. The low cost of micro- and mini-drones, the easy handling, and a considerable payload make them an excellent tool for unwanted surveillance or attacks. The platforms can be equipped with all kind of sensors or, in the worst case, with explosive devices. On the...
Automotive radar sensors typically apply waveforms with a fixed bandwidth. With the new 79 GHz automotive radar band a huge bandwidth of up to 4 GHz has become available, which is an ideal basis for the application of agile waveforms. This paper discusses an approach towards a frequency and bandwidth agile automotive radar sensor that allows to trade maximum range versus resolution. Measurement results...
A small form factor, 79 GHz, MIMO radar sensor with 2D angle of arrival estimation capabilities was designed for automotive applications. It offers a 0.05 m distance resolution required to make small minimum distance measurements. The radar dimensions are 42×44×20 mm3 enabling installation in novel side locations. This aspect, combined with a wide field of view, creates a coverage that compliments...
The aim of this work is to optimize labelling on radar-based grid maps. Therefore, we suggest an active learning system where only the most valuable samples in the training set are to be labelled manually. We show that this approach drastically reduces the overall time needed for labelling. Using only about 40% of the samples in the training set yet still leading to the same classification results...
The High Resolution Wide Swath (HRWS) system opens up new horizons for spaceborne synthetic aperture radar (SAR) imaging. In order to best exploit the HRWS capabilities as successor of the current Sentinel-1 mission, a study focused on the HRWS applications was recently founded by the European Space Agency. Within this study, a new operational mode, denoted as Beam-Switch Wide Swath (BSWS), was proposed...
The paper presents chosen results of testing of non-linear filtering algorithms (an Extended Kalman Filter, two versions of Unscented Kalman Filters and a Particle Filter) in tracking applications. The accuracy of filters have been assessed and compared. The movement of tracked objects has been modeled in a Cartesian frame of reference, whereas the measurements are assumed to be realized in a polar...
In this paper we synthesize optimal algorithm for detection of harmonic signal with known frequency and unknown phase in correlated sea clutter with exponential covariation function. We made analysis of efficiency of the synthesized algorithm for detection of high-speed targets by centimeter radar for different weather conditions (sea states) by statistical simulations.
Combined with short wavelength of the w-band and small volume and low cost advantage of the FMCW SAR, much attention has been paid to the application of W band FMCW SAR with high resolution imaging to close small target imaging. This paper introduces a W-band Rail FMCW SAR used to small target imaging in near-distance. Based on the system parameters simulation and design, the design of the system...
Wind turbines WT are planned to be constructed often relatively close to radar systems, e.g. air traffic control, air defense, weather radar. The WT are lossless scatterers on the ground and may affect the radar operation in-acceptably. The dislocation in wind-farms is often tried to optimize by a placement on radials of the radar. This scheme is analyzed theoretically and numerically in this paper...
Pulse sequence analysis is a crucial part in the research on multi-function radar (MFR) behaviours. It is the base for MFR behaviour recognition and prediction to extract radar words accurately from the intercepted radar pulse sequence. The common radar word extraction methods are only based on the time-of-arrival (TOA) of pulses, which perform not well when dealing with the complex signals with multiple...
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