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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...
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.
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....
This paper report on the development and field trial of a dual-band and dual-use system based on a single photonics-based transceiver and a single radiating element, able to simultaneously carry out radar and communication functionalities. The coexistence of the two operations does not introduce any penalty on the system performance. The innovative sharing of both transceiver and antenna element allows...
This paper describes an Inverse Synthetic Aperture Radar demonstrator utilizing the low-terahertz band. The design and implementation, focusing on the use of standardized commercial off the shelf elements, is described. Images acquired using the implemented system are presented in the paper to confirm its high resolution capability.
Binary codes, which are compressed to a signal with a width of several subpulses and small sidelobes, are searched using a genetic algorithm because they cannot be found by exhaustive search. We found new codes with longer code length and that the peak-sidelobe to peak-mainlobe ratios are smaller than such conventional codes as Barker codes and optimum binary codes. We also indicate the characteristics...
The real-time presentation of the huge data rate generated by high-resolution radars is a challenging task. Latest developments on commercial-of-the-shelf GPUs for image processing provide a suitable resource to implement specific algorithms to perform the required processing at the required throughput. A real time scan conversion algorithm has been implemented using GPU and parallel CPU processes...
This article is devoted to the information reliability of radar systems. Main attention focuses on the radar system human-operator reliability, and to factors that decrease it. The possibilities of it level increase by the introduction of redundancy are explored. Optimal levels of redundancy for the radar system human-operator reliability are defined.
Most of PCL algorithms require clear, non channel-distorted reference signals. However radar systems operate under various environmental circumstances, including dense, multi-path urbanized areas. GSM transmission has built-in mechanism to estimate and overcome multi-path effect. It is good enough for demodulation however not sufficient for PCL applications. The paper presents SVD (Singular Value...
This paper presents an experimental system dedicated for the detection and tracking of small aerial targets such as Unmanned Aerial Vehicles (UAVs) in particular small drones (multirotors). The system was proposed in response to increasing drone popularity and the related threats. The hardware and software parts of the system are covered, including the analogue front-end, FPGA based pre-processing...
There are high range sidelobes for Pseudo-random Code Phase Modulation Continuous Wave (PRC-CW) radar due to the characteristics of the code waveform. In order to suppress the range sidelobes and improve the detection performance, we present a method on the basis of Gold sequence. Given a bunch of Gold coded waveforms, a randomly selected waveform is transmitted. The receiver has the knowledge of...
In this paper is described an experimental passive localization system based on SDR (Software Defined Radio) components. This system is designed to measure Time Differences of Arrival (TDOA) of radar pulses between two platforms. For a TDOA system, time error between the two receivers must be kept very low, which requires a very accurate way to synchronize the time bases. In this purpose, a custom...
The author reports about the progress of an in-house developed radar simulator for active and passive electromagnetic sensing. The goal of the development is to create a very fast simulation tool with an analytical approach. In this paper, the analytical description for the coupling between the radar antennas over radar scatterers is described. The scattering parameters including the phase information...
This article describes CUDA computing architecture, as an effective tool for digital signal processing in radar systems. The goal of this article was to present results of programs that implemented different types of signal processing. In this article authors also presented different methods of increasing the efficiency of the implemented algorithms.
In this work, we present the experimental results and the formed radar images of Through-the-Wall Imaging Radar (TWIR) experiments that were conducted by our recently developed radar sensor. Experiments towards to detection and imaging of both the stationary and the moving targets were conducted. A back-projection type focusing algorithm was applied to focus the raw radar images. The resultant measured...
This paper presents the ground moving target imaging algorithm for dual-channel high resolution SAR images. The algorithm is thoroughly described, including target detection, extraction, imaging and velocity estimation. Selected results of the real airborne mission are presented and further research and improvements are proposed. The radar system used and the test scenario are also briefly described...
A novel concept of orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO) radar for automotive applications is presented in this paper. Multiple transmit antennas are multiplexed via OFDM subcarrier interleaving. Such a multiplexing enables a simultaneous operation of transmit antennas, while the complete bandwidth is utilized by each of them. Whereas the known OFDM-MIMO...
In this paper we developed algorithm for detection non-Gaussianity of the signal and noise mixture. Noise at a radar receiver input has Gaussian distribution, but mixture of noise and useful signal tends to be non-Gaussian. Thus, presence of useful echo signal in the mixture can be detected with use of the proposed algorithm. Further processing in moving target detection system allows distinguishing...
The design of the software radar signal generator using LabVIEW environment and the universal hardware NI PXI — 5673 has been presented in the paper. The stream up to four pulses with linear frequency modulation (LFM) and different durations and gaps between them can be generated in RF band up to 6.6 GHz. Other generation mode i.e. single, repeated and continual can be triggered manually or automatically...
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