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Target-Adaptive Matched Illumination (MI) Radars work on targets which can be resolved into multiple discrete scattering centers. Plurality of scattering centers depend on the physical extent and orientation of the target, the range resolution capabilities of the radar and its operating frequency. Increasing the radar range resolution reduces the amount of backscattered energy per discrete range cell,...
A simple and effective technique is introduced to upgrade the operative bandwidth of a compact photonics-based ESM scanning receiver. The original 0.5 – 10.5 GHz covered frequency range is experimentally demonstrated to broaden to 28.5 GHz, limited by laboratory constraints, and a simulative analysis ensures exceeding the 0.5 – 40 GHz goal by simply employing commercially available electro-optical...
The focus of this paper is on the estimation of the velocity of moving targets with a Forward Scatter Radar system. To this aim a two-dimensional filter bank is proposed with the generic filter impulse response depending on the target electrical size and on the target trajectory that are a priori unknown. In order to limit the computational load required by the bank for practical applications, a two-step...
In this work a Kalman filter for tracking Unmanned Aerial Vehicle (UAV) moving near the base lane of a bistatic radar system and illuminated by GPS signals in three-dimensional (3-D) space is suggested. Continuous-time and discrete-time state equations are derived to define a linear time-invariant model. Model matrices describing the behavior of the object, state vectors, measurement vectors and vector...
This paper follows previous papers and deals with possibilities of radar location determination per TDOA (Time Difference of Arrival) with short base and focused on targets with side antenna beam high suppression (LPI targets).
GMTI radars operate in high altitudes on airborne platforms and observe wide areas on the ground. Thus thousands of moving objects are detected by their Doppler and all measurements are encoded and transmitted to ground stations. Usually, this ends up in a big data or at least mass data problem, especially when results are collected over a long period of time for analysis. So exploratory data analysis...
Clutter heterogeneity caused by cultivation variation of the terrain properties degrades STAP detection performance. In recent years, a priori knowledge sources has been used directly and indirectly for STAP performance improvement. Monostatic radar systems are typically considered, but in the bistatic case, strong clutter non-stationarity introduced by the geometry makes convetional STAP not possible...
The paper puts forward a moving target detection technique for passive bistatic radar systems based on GNSS signals for maritime surveillance applications. If from one hand navigation satellites are extremely attractive as opportunistic sources for passive radar due to their global coverage and the availability of multiple satellites, on the other hand they provide a restricted power budget. To strengthen...
This paper focuses on the feasibility of using Global Navigation Satellite System (GNSS) as the transmitters of opportunity in a passive maritime surveillance radar, mainly for the applications of maritime Moving Target Indication (MTI), as well as the target localization. This can be achieved using multistatic GNSS acquisitions with multiple satellites and a single receiver, and applying multilateration...
Interferometric sonar systems apply the phase content of the sonar signal to measure the angle of a wave front returned from the seafloor or from a target. It collect a big data - datasets that are so large or complex that traditional data processing application software is inadequate to deal with them. The recording a large number of data is associated with the difficulty of their efficient use....
Presented Fly Eye Radar is nature inspired new radar concept, based on application of monopulse direction finding method to multi-beam, wide area of observation RF radar system for wide area simultaneous non scanning detection, tracking and recognition of multiple targets.
Virtual testing can improve safety and quality of driver assistance systems. However, for the accuracy of the whole simulation, the realism of the virtual sensors is crucial. This paper describes a method for simulating an automotive FMCW radar from the wave transmission up to the intermediate frequency signal. The wave propagation is simulated using geometrical optics and ray launching. To obtain...
In this paper technical advances towards future broadband digital frontends are presented and discussed. Technical challenges on this path, such as ultra-wideband digital sampling, architectures for wideband frequency coverage, System on Chip technologies for digital beamforming, broadband antenna apertures including GaN / SiGe TR-Module technologies are addressed. Hensoldt's technological progress...
This paper describes the design of a dual-channel rotary joint for lower millimeter wave frequencies which is characterized by outstanding features - low loss, capability of handling high average and peak power levels, and ease of manufacturing. A certain drawback of the design is its moderate inter-channel isolation. The dual-channel rotary joint is based on a single physical path, namely a circular...
A novel traveling wave patch antenna at 24 GHz is presented which is not radiating into broadside direction. The radiation maximum of the antenna is found at 30° normal to the PCB surface. In this paper the need for this antenna and the specification are described and the derivation of the antenna layout is explained in details. Furthermore simulation and measurement results are given.
Simulation is a powerful tool for radar modulation and array design, the development of radar signal processing algorithms and the evaluation of defined scenarios. With the evolution of radar hardware, the range resolution of radar is often much smaller than the size of the radar targets which cannot be treated as point targets any more. In the literature, various electromagnetic field simulations...
This paper focuses on application of pulsar signals for pulsar-based navigation. The aim of the study is to present a possible algorithm for signal processing of pulsar signals, which consists of epoch folding, filtering and detection, and evaluate it using the real experimental data obtained from the radio observatory Dwingeloo, the Netherlands.
A new clutter-map constant false alarm rate (CFAR) detection algorithm for log-normal distribution is proposed. A combination of two recursive estimators (dual estimators) is considered for the estimation of the mean and standard deviation of the log-normal interference. Compared with the estimation method based on digital exponential filtering technique, the dual estimators converge faster while...
In this paper are presented the implementation of some blocks of software radar receiver on the PXI platform. Realization of the processing of radar signals in real time is achieved. Comparative analysis of the results of detection of real radar targets between the offline and processing in real time on the appropriate hardware components is shown.
The size and number of vessels in the maritime domain has grown significantly over the past decades. Hence, it has become more and more important to obtain reliable information about the current traffic situation. There cannot be more than one traffic situation at a certain time in a specific area. This unique traffic situation picture is seen differently and never in total by each individual vessel...
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