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We present a Radar Environment Simulator (RES) that simulates the radar environment of a pulse Doppler radar in real-time. Hereby, the RES simulates pre-defined scenarios fully autonomously and interactively with the radar system. The RES generates digital I/Q signals containing radar returns of point sources, jammers and distributed clutter sources. Sophisticated physical models for point source...
In this paper, the E-pulse (extinction pulse) method known as aspect-independent ultra-wideband radar target discrimination technique is discussed. An alternative synthesis algorithm for the subsection polynomial E-pulse is introduced. The algorithm consists in building a skeleton E-pulse, its further extending and series of integration which all could be performed over the coefficients of basic functions...
In this paper, a quasi-horn antenna array, which is combination of 4 × 4 slot array and its flares, is designed for Ku band monopulse radiation. The slots are fed by waveguide power divider. In order to obtain sum and difference radiation pattern, a magic T is utilized end of the waveguide feeder. Slot dimensions and distance between each slot are adjusted and optimized to get high gain and low return...
This paper presents the approach to the design of angle of arrival estimator for narrow-band noise-like signal based on artificial neural network (ANN). The multilayer perceptron type ANNs are trained to minimize the sum of squared errors or maximize the likelihood function using the deterministic approach with the data samples generated by the single station model. The special type of output neuron...
A major future challenge to providers of nautical equipment and navigational radar systems is to make such systems affordable to cost-sensitive customers in the commercial maritime market. This paper presents an approach for a combined S- and X-band navigational phased array radar. The state of the art as well as expected advantages of the proposed solution are discussed. This study also provides...
This report proposes a detection method based on using kurtosis and maximum amplitude information, both extracted from the spectral domain. At the end we face a classification problem which is solved by introducing a linear decision boundary. This new method is proved to result into overall good and stable detection results.
In this paper design and implementing process of a compact, low-cost and user-friendly probe signal generator for pulse radars and constant wave radars based on software-defined radio (SDR) are presented [1]. In his research the author uses the Universal Software Radio Peripheral (USRP) as SDR developed by the National Instruments [2]. Proposed device was designed for a wide range of the radar systems,...
In this paper, we investigated adaptive signal processing algorithms for high-resolution imaging of short range targets by 24 GHz millimeter wave (MMW) surveillance radar system. For test measurements, a step frequency continuous wave (SFCW) based Synthetic Aperture Radar (SAR) imaging system has been developed by using Anritsu MS4644A Vector Network Analyzer (VNA) and A-scan radar data were collected...
We numerically explore, for a three-layered dielectric medium, Interferometric Synthetic Aperture Radar (InSAR) coherence phase bias arising from co-polarized interferometric observations of electromagnetic (EM) interrogation of, and scattering from, penetrable subsurface media which can be approximated (at least locally, at the SAR pixel level) as planar-layered. A recently-developed incoherent scattering...
Vehicle speed detection in a highway can be performed using either laser or radio-frequency (RF) signals. Since laser speed detectors are prone to weather conditions and easy to jam, they are not preferred in practical applications. However, FMCW radars in the GHz frequencies provide excellent distance and speed measurement performance where high accuracy and reliability are needed. In this study,...
In this study, micro-Doppler-based aerial target classification is examined together with the consideration of wind turbine clutter (WTC). In the examinations, wavelet coefficients extracted from micro-Doppler profiles are employed as classifier features for the airliner-, glider- and helicopter-type aerial targets and also for the examined wind turbine (WT) model. In order to simulate the targets'...
Paper has described algorithms of the fractal dimension estimation. Their effectiveness is considered in condition of independent and dependent samples of vectors in pseudophase space. Model of the fractal object based on dependent samples is represented. Appliance of these algorithms for textural processing is proposed.
A robust target recognition method proposed based on recurrence plot and recurrence quantification analysis (RQA) to generate robust features against noise, target velocity and aspect angle from micro-Doppler (m-D) signatures. The proposed method is tested on simulated data of three different targets using multiclass support vector machine (MSVM) and classification rate of about 95 % is achieved....
In this work, we present a binomial splitting Gaussian mixture unscented Kalman probability hypothesis density (BSGM-UKPHD) filter. The BSGM-UKPHD filter applies a binomial splitting strategy to the original Gaussian mixture unscented Kalman probability hypothesis density (GM-UKPHD) filter, to gain performance promotion when the measurement function is nonlinear. The binomial splitting approximates...
The paper presents the concept of using aerial and satellite imagery or images coming from the marine radar to identify and track vessels at sea. The acquired data were subjected to a highly advanced image analysis. The development of remote sensing techniques allows to gain a huge amount of data. These data are useful information source however usually we have to use different data mining methods...
In this paper we present a feasibility study on using satellite signal for passive radar application. Our focus is on utilizing GEO (geostationary Earth orbit) satellite signal with suitable properties. The feasibility of using such satellite signal for passive radar application is evaluated. In particular, a space shuttle as the target of interest is considered. In addition to being covert, it will...
In this work, we have presenteda focusing algorithm for tree-penetrating radar applications. The details of our imaging and focusing algorithm to detect cavities inside a tree-body were given. First, the algorithm has been tested with the simulation data that were generated by the help of perfect point scatterers. Then, the algorithm was applied to the measurement data that have been collected from...
The NATO SET-225 Research Group has mainly been working to share experience of processing noise radar signals to address the limitations of current approaches in order to increase the range of noise radar applications. This paper defines a software defined L-band noise radar technology (NRT) demonstrator. This radar design process has originally started as an endeavour to build a digital signal processing...
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