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Radar Conference, 2003. Proceedings of the 2003 IEEE

Date 5-8 May 2003

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Displaying Results 1 - 25 of 74
  • Sensor staggering in multi-sensor target tracking systems

    Publication Year: 2003, Page(s):354 - 361
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB) | HTML iconHTML

    For a multi-sensor target tracking system in a cluttered environment, the effects of temporally staggered sensors on system performance are investigated and compared with those of synchronous sensors. A probabilistic data association filter (PDAF) is used to track the target. Measurements from local sensors are fused in a centralized manner for the system with synchronous sensors. The system perfo... View full abstract»

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  • Current airborne radars of the world in the International Radar Directory CD-ROM

    Publication Year: 2003, Page(s):15 - 18
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (270 KB) | HTML iconHTML

    The International Radar Directory CD-ROM (IRD) resulted from a twenty-year collection effort by this author of open information on radars of the world. That effort identified some 9,800 radars; however, most of those numbers are no longer in use. The production IRD contains technical information on 674 current radars. Radar functions (applications) now include some 50. This paper presents a review... View full abstract»

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  • Sequential ing and adaptive processing (SNAP)

    Publication Year: 2003, Page(s):460 - 467
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB) | HTML iconHTML

    The sequential ing and adaptive processing concept is an interference suppression technique applicable to modern phased array antennas. Using many of the same basic principles as the fully adaptive array approach, SNAP provides comparable interference suppression with significantly simpler antenna architecture. View full abstract»

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  • Terrestrial based inflatable dish antennas

    Publication Year: 2003, Page(s):283 - 290
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (782 KB) | HTML iconHTML

    A terrestrial based 4.8-meter dish is presented. The dish is constructed using lightweight, thin film technologies used in spaced-based platforms. Seaming two parabolic dish films together forms a lenticular. One film is coated with a silver flake conductive paint, and the other is RF transparent. The lenticular is inflated to hold the parabolic shape of the dish. The lenticular is attached to the... View full abstract»

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  • Mitigating the effects of chaff in ballistic missile defense

    Publication Year: 2003, Page(s):19 - 22
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (301 KB) | HTML iconHTML

    In this paper, an algorithmic (schema) approach for detecting and tracking targets in highly cluttered environments is presented. The approach is to accurately track the centroid of the chaff cloud using a combination of medium band (MB) and wide band (WB) range resolution radar waveforms. At moderate pulse repetition frequencies (PRFs), differential target velocities (about the centroid of the ch... View full abstract»

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  • Medium PRF radar PRF optimisation using evolutionary algorithms

    Publication Year: 2003, Page(s):192 - 197
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB) | HTML iconHTML

    In this paper we employ evolutionary algorithms for the selection of optimal pulse repetition frequency (PRF) sets to minimise range-Doppler blindness in a model of a medium PRF radar. Both eight and nine PRF schedules are considered and the algorithm ensures that all the solutions produced are fully decodable and have no blind velocities. We consider the detailed effects of side-lobe clutter and ... View full abstract»

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  • Effects of geometry on clutter characteristics of bistatic radars

    Publication Year: 2003, Page(s):417 - 424
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (525 KB) | HTML iconHTML

    This paper deals with the clutter characteristics of multichannel airborne radars. The analysis is performed using the clutter spectral center, which is a descriptive metric, in addition to commonly used measures such as Doppler-angle traces, iso-range, and iso-Doppler contours etc. The clutter characteristics of monostatic systems in the presence of crab angles and system errors are first examine... View full abstract»

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  • Finite difference time domain simulation of moving objects

    Publication Year: 2003, Page(s):439 - 445
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (450 KB) | HTML iconHTML

    Normally in the finite difference time domain (FDTD) technique, stationary objects are modeled in a time domain simulation as a field propagates around them, and possibly inside these objects. This paper illustrates a method in which EM fields and a moving object can be modeled using the FDTD technique. By using a technique of dielectric approximation and intermediate step field movement, it is po... View full abstract»

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  • A quadrant-based location tracking method

    Publication Year: 2003, Page(s):350 - 353
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (255 KB) | HTML iconHTML

    In the problem of location tracking based on the range measurement from at least three sensors, the nonlinear measurement equations are often linearized locally about the true position. Because the high-order terms are neglected, the approximation error is inevitably introduced into the result of location tracking. In this paper, a novel quadrant linearization method is proposed to overcome this d... View full abstract»

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  • A radically new target detection process

    Publication Year: 2003, Page(s):216 - 222
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (486 KB) | HTML iconHTML

    Conventional radar detection of a target in the presence of external interference and thermal noise follows the classic matched filter approach by spatially and temporally processing multiple samples of the received signals. This process is sometimes referred to as the space time adaptive process (STAP). This process has two deficiencies in that multiple somewhat stationary time samples are requir... View full abstract»

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  • Detection improvements with CFARs having expanded amplitude inputs

    Publication Year: 2003, Page(s):116 - 120
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (347 KB) | HTML iconHTML

    This paper addresses some differences in performance of cell averaging, constant false alarm rate (CA-CFAR) processors as a function of whether the input signal has linear, square-law, or a higher order response relative to the output of a linear receiver. For brevity, these CFAR inputs are herein referred to as A, A2, A4, etc., signals. Specifically, the CFAR input voltage i... View full abstract»

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  • Experimental modified reflectivity of backscatter from the sea surface, at very low grazing angles, compared to a ducted sea clutter model used in navy radar simulations

    Publication Year: 2003, Page(s):23 - 27
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (302 KB) | HTML iconHTML

    This paper presents the results of a comparison between a high fidelity clutter reflectivity model that includes the effects of anomalous surface propagation and surface clutter reflectivity measured using the U.S. Navy AN/SPY-1A radar system. View full abstract»

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  • FOPEN scene generation using numerical electromagnetic analysis

    Publication Year: 2003, Page(s):362 - 369
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (479 KB) | HTML iconHTML

    This work develops the high-fidelity simulation capability for foliage penetration (FOPEN) synthetic aperture radar (SAR). The simulation is based on a method of moments (MOM) numerical electromagnetic analysis of target scenes including foliage. The ability to accurately model the interaction of foliage and target is crucial for an accurate simulation. Example scenes for isolated metal targets ar... View full abstract»

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  • Operations of an airborne bistatic adjunct to space based radar

    Publication Year: 2003, Page(s):133 - 138
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (477 KB) | HTML iconHTML

    Space to air bistatic concept of operations for area surveillance has renewed potential to extend the capability of space-based radars. However, design considerations of antenna size, number of simultaneous receive beams, and bistatic geometries must be analyzed in terms of area coverage rate and target signal to noise ratio. The clutter spectrum, observed from a space bourne transmitter to airbor... View full abstract»

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  • Feasibility analysis of GSM signal for passive radar

    Publication Year: 2003, Page(s):425 - 430
    Cited by:  Papers (13)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (506 KB) | HTML iconHTML

    Passive radar makes use of an 'illuminator of opportunity' already present in the environment for other purposes (TV transmission, broadcast systems, etc) to detect targets as well as estimating target parameters. This radar has the merit of being a completely covert radar system, which does not advertise the presence of either the receivers or transmitting stations. One such existing radio transm... View full abstract»

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  • Adaptive polarimetric detection in compound-Gaussian clutter

    Publication Year: 2003, Page(s):102 - 109
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (557 KB) | HTML iconHTML

    In this paper we deal with the problem of polarization diversity detection in compound-Gaussian clutter with unknown covariance matrix. To this end we assume that a set of secondary data, free of signal components and with the same covariance structure of the cell under test, is available. Due to the lack of a uniformly most powerful (UMP) detector, we resort to a design procedure based upon the R... View full abstract»

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  • Sidelobe reduction for matched filter range processing

    Publication Year: 2003, Page(s):446 - 451
    Cited by:  Papers (18)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    Linear frequency modulation (LFM) matched filtering results in range sidelobes. These sidelobes are often objectionable because they may mask small targets or may be mistaken for targets themselves. Various methods of sidelobe control are investigated and their performance is measured. The methods of sidelobe reduction include dual apodization, spatially variant apodization, and leakage energy min... View full abstract»

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  • Multi-channel signal subspace processing methods for SAR-MTI

    Publication Year: 2003, Page(s):126 - 132
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (467 KB) | HTML iconHTML

    This paper examines coherent signal processing methods for combining the data that are collected via multi-channel airborne radar system for MTI/GMTI. We study the methods that convert multi-channel radar data into dual along-track monopulse SAR signals of the radiated scene. A 2D adaptive filtering method, that projects the data in one synthesized SAR channel into the signal subspace of the other... View full abstract»

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  • A novel method for improving the real-time of multitarget-multisensor tracking system

    Publication Year: 2003, Page(s):223 - 227
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (301 KB) | HTML iconHTML

    Since multitarget-multisensor tracking system can effectively fuse all kinds of information came from all kinds of sensors, this tracking system can more correctly track targets and widely interpret their state than any single tracking system does. But the real-time the multitarget-multisensor tracking system is not very good. In this paper, a novel method is presented, which is to improve the rea... View full abstract»

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  • Blind adaptive detection of distributed targets in compound-Gaussian clutter

    Publication Year: 2003, Page(s):291 - 297
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (474 KB) | HTML iconHTML

    This paper considers the problem of detecting distributed targets in the presence of compound-Gaussian noise with unknown statistics. At the design stage, in order to cope with the a priori uncertainty, we model clutter returns as Gaussian vectors with the same structure of the covariance matrix, but possibly different power levels. Hence, resorting to the method of sieves, we devise a fully blind... View full abstract»

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  • Design of large space based radar for multimode surveillance

    Publication Year: 2003, Page(s):1 - 6
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (465 KB) | HTML iconHTML

    Space based radars have been under consideration for several years [Skolnik, MI, 1997], and have only been made commercially available for synthetic aperture radar modes. This is due to the limited availability of space based microwave technologies and the high cost of manufacturing large space systems. Several technology programs have promised significant advances in affordable phased array radar... View full abstract»

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  • Maximum likelihood angle extractor in the presence of sea-surface multipath

    Publication Year: 2003, Page(s):337 - 344
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (491 KB) | HTML iconHTML

    In the presence of sea-surface multipath, the standard monopulse ratio technique to extract elevation angle of target produces large bias. In this paper we propose a maximum likelihood (ML) angle extraction technique for low elevation targets above the sea surface, of known average signal strength having a Rayleigh fluctuation. The procedure is then modified for targets having unknown average sign... View full abstract»

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  • Non-linear STAP filters based on adaptive 2D-FIR filters

    Publication Year: 2003, Page(s):51 - 58
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (503 KB) | HTML iconHTML

    This paper presents a non-linear adaptive approach to the cancellation of clutter echoes in modern AEW radar systems equipped with digital beamforming. Two new STAP schemes are conceived by using different non-linear functions that are applied to the output of a bank of adaptive 2D FIR filters. The STAP schemes are shown to yield better detection performance than previously known schemes when oper... View full abstract»

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  • Configuring a sparse aperture antenna for spaceborne MTI radar

    Publication Year: 2003, Page(s):139 - 146
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (535 KB) | HTML iconHTML

    Sparse arrays provide potential for improving the minimum detectable velocity (over 3 m/s improvement for sidelooking radar) of spaceborne moving target indication radar for a given physical aperture. This paper examines the benefits and some of the challenges resulting from employing sparse arrays: grating lobes introduce ambiguities that may create Doppler blind zones; area coverage rate may red... View full abstract»

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  • Doubly adaptive bistatic clutter filtering

    Publication Year: 2003, Page(s):171 - 178
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (558 KB) | HTML iconHTML

    Bistatic aerospace radar systems offer certain operational advantages over their monostatic counterparts. However, bistatic radar must contend with spectrally severe ground clutter returns. Effective adaptive filtering is necessary to improve detection performance, but the non-stationary nature of bistatic clutter degrades performance. As a result, bistatic STAP techniques must incorporate modific... View full abstract»

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