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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...
The effectiveness analysis of the mismatched sidelobe-free filter for compression of phase-shift keyed signals is performed. At that the various types of phase-shift keying codes were considered. The comparative analysis of compression effectiveness of phase-shift keyed signals is carried out. For codes of different lengths, the pairs with the mismatched sidelobe-free filter were found, providing...
In the paper the system concept of critical infrastructure protection is presented. The described system is developed within the framework of FP7 European Union project on Multitech SeCurity system for intercOnnected space control groUnd staTions (SCOUT). The goal of the SCOUT project is to study, design and analyze a risk-based approach of a security system relying on multiple technologies. The noise...
When a massive multiprocessor, such as Graphics Processing Unit, is used for radar signal processing, it achieves its peak performance only with a large amount of data buffering. This causes a significant delay between the actual transmit-receive event and the appearance of detection and/or estimated parameters of an object at the processor output. The paper is aimed at assessing the influence of...
To measure the height of extended targets using radar wave multipath propagation, the line-of-sight (LOS) and the longest non-line-of-sight (NLOS) echos from a coherent target must be resolved accurately. This paper compares the performance of the recursive Fourier algorithm RELAX and the Method of Direction Estimation (MODE) algorithm for the purpose of multipath height finding. The main comparison...
The F-SAR instrument represents DLR's advanced airborne SAR testbed for technology and remote sensing applications. The development of the instrument was triggered by a strong demand for data being simultaneously acquired at different wavelengths and polarizations as well as by the demand for very high range resolution. F-SAR is a modular development utilizing modern hardware and commercial of the...
In Germany nearly 64 percent of common housing stock was built before 1978 mainly without any insulation. Following the first and second oil crisis in 1973 and 1979 awareness for thermal insulation has grown and corresponding measures successively have been integrated into the building architecture over the next decades. As there exist almost no construction plans about wall structure of buildings...
The radar warning and information system for applications in disaster management (RAWIS) is being designed and constructed in a consortium comprising eight partners. It is intended for civil protection applications and will support emergency teams engaged in complex mission contexts. This paper gives an overview of the overall project and addresses some aspects of the sub-projects.
This paper presents a new development of a 24 GHz radar frontend with a Rotman Lens as a beamforming network. The main objective of the project is the accurate detection and localization of multiple targets at the same distance from the radar system. Interferometric systems determine the direction for a target with the phase difference through at least two receiving antennas. If multiple targets are...
Continuously improving analog and digital hardware nowadays enables powerful waveforms at low costs and thus makes radar an attractive and cheap sensor for new fields of application. One such field is human machine interfaces (HMI). In this work, gesture classification based on high resolution radar measurements as new type of HMI is investigated. For this purpose, wideband radar measurements of human...
The Radar Research Group of the Budapest University of Technology and Economics has been developing a distributed passive radar system. Multilateration principle is used to locate uncooperative drones, by capturing radio traffic in the ISM bands. The proposed radar system should be integrated into a more complex reconnaissance scheme, where additional sensors (e.g. PTZ cameras, microphone arrays,…)...
We examine the moving range-spread target in distributed multi-input multi-output (MIMO) radar. More precisely, a knowledge-aided (KA) model for nonhomogenous disturbance is proposed. We model the covariance matrices for different transmit-receive (Tx-Rx) pairs as random matrices, which share the same matrix structure but with different power levels for the non-homogeneous clutter powers across different...
With the increasing complexity of the surrounding maritime situation, the high resolution imaging of ship targets has become a hot topic again in recent years. The optimal time selection based imaging is an effective approach for ship ISAR imaging. In this paper, two optimal time selection based imaging methods for ship targets, which use an improved Doppler Spread (DS) estimation and the Doppler...
Aiming to solve the difficulty involved in wideband beamforming for conformal arrays, a novel adaptive frequency invariant beamforming algorithm is proposed in this paper. In this algorithm, the pre-steering delays of the traditional Frost beamformer are firstly removed by utilizing a new constraint matrix, which also incorporates the element patterns into the adaptive algorithm. Then, the interference-plus-noise...
The highly limited number of observation results in the increase of the prediction errors. In such case the linear Kalman filter (KF) will work within the unsteady state, which can lead to unpredictable results. The paper presents an alternative, simplified methods for the tracked object position prediction with the linearization of the trajectory. The obtained results are compared with the KF predictions...
This paper describes a method of separation (degarbling) of individual Secondary Surveillance Radar replies from a mixture (garble) received using a multi-channel antenna system. The aim of described method is to increase the number of correctly decoded messages used for aircraft surveillance by Air-Traffic Control center. Firstly, described method is evaluated on the model data simulation and afterwards...
In the past period, great efforts have been made to develop methods for the people detection based on monitoring their respiratory motion using ultrawideband (UWB) radar. The basic principle of the respiratory motion detection consists in the identification of sensor signal components possessing a significant power in the frequency band 0.1–0.7 Hz (frequency band of human respiratory rate) corresponding...
Among different radar design concepts, the “One radar - one equation” approach focused on the philosophy of the radar design to optimize information extraction and maximize the degree of measurement freedom for radar detection, tracking and recognition of the flying small size objects. Application of this concept wishes to exploit capabilities of the radars are collocated or located in Gaussian monostatic,...
In this paper DMPAR Evaluation Trials for Operationally Upgraded Radar (DETOUR) and their results for a selected scenario are described. The DETOUR trials were conducted by the SET-195 research task group (RTG) under an umbrella of NATO Science and Technology Organization from September 1 to 4, 2014 as a part of the DMPAR (Deployable Multi-band Passive/Active Radar) algorithms' evaluation process...
This article s focused on radar technology and radio surveillance systems produced in Czech republic as a part of Czechoslovakia until 1990s. During this era there were produced thousands of radars for military and civil purpose for air traffic control, ship navigation, meteo radars, fire control and air defense radars used worldwide. The special domain in electronic location and surveillance systems...
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