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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 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...
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...
Frequency-Modulated Continuous-Wave Synthetic Aperture Radar (FMCW SAR) is a compact, cost-effective and high-resolution remote sensing system. The Frequency non-linearities of FMCW SAR seriously deteriorate its range resolution. To overcome this problem and integrate the non-linearity correction method into the imaging algorithm, in this paper, we propose a non-linear range-Doppler algorithm for...
SAR is a very popular instrument for imaging of the ground surface. Possibility of high-resolution image formation makes it superior tool for various information extraction tasks. In the paper, a problem of automatic target recognition is comprehensively analyzed. An idea of azimuth and range target profiles fusion is proposed. It is demonstrated, that usage of a proper image preprocessing with appropriate...
Pilots in manned aviation shall “See and Avoid” other aircraft in front of and beside the own aircraft. “Sense and Avoid” (S&A) systems shall enable the operation of unmanned aerial vehicles (UAVs) in controlled airspace by fulfilling this “See and Avoid” task. One main sensor of such a sense and avoid system is the radar. The crux in developing an S&A radar is to minimize size and weight...
We have recently presented a processor for traffic monitoring applications that combines the post-Doppler space-time adaptive processing (PD STAP) with a road map obtained from the freely available OpenStreetMap (OSM). In this paper, the positioning error model of this processor is presented and discussed. In fact, two error models are combined: one for the PD STAP detections and one for the OSM road...
A new radar system, Sinusoidal Frequency Modulated Continuous Wave radar is used to estimate azimuth angles of radar targets. It overcomes the defect that the Linear Frequency Modulated Continuous Wave radar fails to determine the azimuth angles of multiple targets at the same distance simultaneously. However, it is more difficult to estimate azimuth angles from this complicated radar echoes than...
Radar network has important application in many fields, such as small target detection etc, especially for the case with wide baseline. Until now, the research to the 3-dimensional (3D) target localization accuracy using radar network is still a research focus in the radar community. In this paper, further research to the radar network with aerial and ground-based nodes is carried out, and the analytical...
A dual-polarization passive bistatic radar is used to evaluate the potential benefit of cross-polarized measurements for the suppression of strong direct signal interference in the DVB-T band. The linear array antenna consists of 10 bowtie elements, 5 of which measuring horizontal and 5 vertical polarization. Two small GPS-equipped aircraft were used as targets, flying prescribed patterns. Two antenna...
Frequency-Modulated Continuous-Wave Synthetic Aperture Radar (FMCW SAR) is a promising compact remote imaging sensor. A refocusing method of ground moving targets for FMCW SAR is derived considering the moving target range cell walk within a long coherent processing interval. To discriminate the target optimally, the concept of relative motion is utilized. By searching a relative factor, moving targets...
Electronic Phased-Array Radars offer new possibilities for Radar Search Pattern Optimization by using bi-dimensional beam-forming and beam steering, along both elevation and azimuth axes. The Radar Search Pattern Optimization problem can be approximated as a Set Cover problem and solved using Integer Programming methods. This approximation can be extended to account for direction-specific scan update...
Synthetic Aperture Radar (SAR) spaceborne imaging with High Resolution Wide Swath (HRWS) capabilities has been the subject of increasing interest and active research, driven by applications posing requirements of high spatial resolution and short revisit times which cannot be directly fulfilled with conventional system architectures. In this context, the paper examines a combination of two promising...
This paper presents different millimeter wave systems for robotic mapping and localization as well as for security scan applications. The 2D system in the first part of this paper is mechanically rotating the radar module to allow a continous revolving FMCW radar beam in azimuth plane. This extracted data is compared with the data of a LiDAR system. In the second part 3D imaging systems are presented...
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