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This paper studies a maritime vessel detection method based on the fusion of data obtained from two different sensors, namely a synthetic aperture radar (SAR) and an automatic identification system (AIS) embedded in a satellite. In this work we propose a detector that uses the vessel position provided by the AIS system to improve the radar detection performance. The problem is handled by a generalized...
Passive radar detection systems based on Global Navigation Satellite System (GNSS) signals have the advantages of wide coverage, long detecting distance and good concealment. If effectively combined with the forward scatter radar (FSR) principle, it can be used to monitor an important area, which is of great significance to national defense security. This paper mainly focused on the analysis of signal...
High resolution images of Mechanically Scanned Imaging Sonars can bring detailed representation of underwater area if favorable conditions for acoustic signal to propagate are provided. However to properly asses underwater situation based solely on such data can be challenging for less than proficient interpreter. In this paper we propose a method to enhance interpretative potential of MSIS image...
Tandem-L is a proposal for a spaceborne L-band SAR mission that aims at the global monitoring of dynamic processes on the Earth. The mission will acquire an enormous amount of data for different applications. These data will be used to provide information concerning biosphere, geosphere, cryosphere, and hydrosphere. Within the scope of this mission, an observation concept has to be developed in order...
In an automotive environment the presence of reflecting surfaces cannot be avoided. The electromagnetic wave returning from a target vehicle can get reflected on those surfaces causing a non existing so-called ghost target. For driver assistance systems ghost targets can lead to false decisions and, therefore, they should be detected and avoided. In this paper a model for describing those ghost targets...
Studies on cloud microphysics, cloud intra structure on vertical/3D scale, its evolution in time and space in real time has not been carried out much in India due to non availability of indigenous ka-band cloud prifiling radar system. The high cost & maintenance of the imported system has prohibited Indian scientists to procure such radars in numbers. Persistant requirement put forward by Indian...
The calculation of the maximum permissible optical energy for two scanning patterns of miniaturized scanning LiDAR systems is presented. The scanning patterns are selected to be suitable for next generation systems based on MEMS mirrors and Optical Phased Arrays alike. Two different wavelengths are compared. Based on the current version of the laser safety standard IEC 60825-1 the maximum energy is...
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...
Due to large quantity of data needed for image synthesis in SAR applications, methods of raw signal compression were developed alongside actual imaging systems. Although performance of modern processing units allows on-platform, online image synthesis, data compressor still can be a valuable addition. Since it is no longer necessary part of SAR system, it should be delivered in a flexible, easy to...
This paper presents a technique for detection of selected targets in the context of ultrawideband noise radar. The technique applies to scenarios where targets can be modeled as having a few predominant scatterers, such as some made man-made targets. The basic idea is to change the signal used as reference for detection in such a way that it is adapted to the predominant scatterers of the targets...
This paper describes the implementation of a pseudo-random noise radar system on a scalable sensor platform that consists of several multi-purpose 61- and 122-GHz transceivers in a Silicon-Germanium BiCMOS technology. The multi-band transceivers are equipped with a frequency multiplier to generate the 61- and 122-GHz carrier signals from a single 30.5-GHz LO signal and can be cascaded to build a MIMO...
Current solutions for localization of first responders are mainly based on fusion of multiple sensors and communication units. This solution usually requires too much space and weight that must be carried by rescue, police or military personnel. The goal of the paper is to demonstrate the benefits of UWB technology for such an application scenario. This technology represents a promising solution since...
The goal of this paper is to introduce a new concept - using Data Mining approach for radar classification of vehicles, based on their GPS shadow signals detected in a GPS L1-based Forward Scatter Radar (FSR) system. Real data is used for the current experiments, recording the GPS radio shadows of several moving vehicles with commercial non-professional GPS equipment. The records are further processed...
We present an algorithm that allows an interceptor aircraft equipped with an airborne radar to meet another air target (the intercepted) by developing a guidance law and automatically adapting and optimising the transmitted waveform on a pulse to pulse basis. The algorithm uses a Kalman filter to predict the relative position and speed of the interceptor with respect to the target. The transmitted...
The interferometric Synthetic Aperture Radar (SAR) mission TanDEM-X has opened a new era in spaceborne radar remote sensing. Since the end of 2010, the two SAR satellites TerraSAR-X and TanDEM-X have been flying in a controlled close orbit formation, acting as a large single-pass SAR interferometer. The acquired high-quality interferometric SAR data is not only the primary source to generate a global...
This paper presents the results of the Software-defined Multiband Array Passive Radar (SMARP) project. The objective of the project was to design and realize a multiband passive radar demonstrator based on a software-defined solution and oriented to coastal surveillance applications. This work has been conceived in the framework of the Italian National Plan for Military Research. The project overall...
The paper deals with the azimuth estimation by passive coherent locator (PCL). PCL uses FM radio broadcasting in the VHF band. The amplitude monopulse, Bartlett method of direction of arrival and their combination are applied for the target azimuth estimation. The performance of these methods is presented on several simulations. Simulation results are validated by an outdoor measurement with mobile...
LTE has several advantages to be investigated as transmitter of opportunity for passive radar in Germany: low carrier frequencies (i.e. low free space attenuation), high bandwidth (i.e. high range resolution) and wide area network (i.e. large availability). Therefore the signal correlation behavior is investigated. Additionally, a signal processing method is proposed for passive radar using LTE. The...
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...
This paper presents investigations on a radar sensor concept tailored for bird observation in direct proximity of wind turbines. The task is to monitor birds which live in the surrounding of a wind farm in order to stop concerned wind turbines in case of probable collisions. Experiments were performed leading to a proper characterization of the dynamic radar echoes of birds and wind turbines. A concept...
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