Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)

3-3 May 2001

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  • Proceedings of the 2001 IEEE Radar Conference (Cat. No.01CH37200)

    Publication Year: 2001
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    Freely Available from IEEE
  • Conference Author Index

    Publication Year: 2001, Page(s):463 - 464
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    Freely Available from IEEE
  • New ranging algorithm for FM/CW radars

    Publication Year: 2001, Page(s):421 - 425
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB) | HTML iconHTML

    A new ranging algorithm for frequency modulated/continuous wave (FM/CW) radars is given. This algorithm is near optimal, very robust, does not depend on the type of modulation, and is fairly easy to compute. An example of an older algorithm based on sinusoidal frequency modulation (FM) used on the MK-95 CW radar is given to illustrate shortcomings in typical older algorithms and for comparison pur... View full abstract»

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  • Effects of various image enhancement techniques on FOPEN data

    Publication Year: 2001, Page(s):87 - 92
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB) | HTML iconHTML

    An investigation of FOPEN target discrimination performance is summarized using UHF SAR data gathered at Grayling, MI by the USA Navy's P-3 SAR Sensor. The fully polarimetric data are processed using polarimetric whitening; superresolution processing is then applied to enhance the resolution of the whitened data. Several superresolution approaches are investigated and target discrimination perform... View full abstract»

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  • Characterization of C-band and X-band InSAR data for 3D urban analysis

    Publication Year: 2001, Page(s):415 - 420
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB) | HTML iconHTML

    We compare C and X-band SAR measurements over the same urban area to understand which kind of information they are able to provide and which are the differences and similarities of the data sets. In particular, we consider data recorded over Los Angeles by the C-band NASA/JPL AIRSAR system and by the X-band Intermap Star-3i system. We analyze for both data sets the original range measurements as r... View full abstract»

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  • Detecting a step pattern of change in multitemporal SAR images

    Publication Year: 2001, Page(s):294 - 299
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB) | HTML iconHTML

    We address the problem of deriving adequate detection and classification schemes to fully exploit the information available in a sequence of SAR images. In particular we address the case of detecting a step reflectivity change pattern against a constant pattern. We propose two different techniques, based on a maximum likelihood approach, that make different use of prior knowledge on the searched p... View full abstract»

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  • Fast converging robust adaptive arrays

    Publication Year: 2001, Page(s):216 - 221
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB) | HTML iconHTML

    A pseudo-median canceller is introduced as the canonical processor of a robust adaptive array method which significantly reduces the deleterious effects of non-Gaussian, real-world noise and interference (outliers) on typical array performance metrics such as (normalized) output noise power residue and signal-to-interference-plus-noise ratio (SINR). In addition, the proposed structure offers natur... View full abstract»

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  • New results on minimum-PSL binary codes

    Publication Year: 2001, Page(s):153 - 156
    Cited by:  Papers (22)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB) | HTML iconHTML

    Cohen et al., (1990), found the lowest-PSL (peak sidelobe level) codes for N⩽48 using a search algorithm that exploits two PSL-preserving operations. This note explains how to exploit a third PSL-preserving operation in combination with the first two in a single exhaustive search routine. There is a two-fold payoff: a factor-of-two search speedup and a more efficient representation of the set ... View full abstract»

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  • Ship detection in SAR images: a segmentation-based approach

    Publication Year: 2001, Page(s):81 - 86
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB) | HTML iconHTML

    This paper deals with the problem of detecting ship targets in medium- and high-resolution SAR images. Achieving a controlled false alarm rate is a major problem for the presence of a highly non-homogeneous sea clutter environment due to the highly variable environmental and weather conditions in closely spaced areas. After highlighting the problems of conventional techniques, a new approach is pr... View full abstract»

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  • Angular glint suppression for mm-wave terminal guidance radar based on polarization agility and RCS weighting

    Publication Year: 2001, Page(s):410 - 414
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    Angular glint greatly reduces guidance accuracy of millimeter radar. As a way to suppress its effect, a RCS weighting method employing polarization agility and frequency agility is proposed. In simulation, an aircraft is decomposed into thirty parts to get the RCS and two-dimensional linear angle errors caused by angular glint. The results show that the square root error value of angular glint can... View full abstract»

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  • Signal processing method for switch antenna array of the FMCW radar

    Publication Year: 2001, Page(s):289 - 293
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB) | HTML iconHTML

    The switch antenna array (SAA) is a promising substitute for multi-channel antenna array (MAA) due to its low cost, small volume and high resolution. The current signal processing method is efficient only in the low velocity and low frequency case. A new 2-dimension method is proposed, which is suitable to bearing estimation of moving objects without any restriction on their velocity. This method ... View full abstract»

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  • Application of array processing techniques to multibaseline InSAR for layover solution

    Publication Year: 2001, Page(s):210 - 215
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB) | HTML iconHTML

    Synthetic aperture radar interferometry (InSAR) is a modern technique to derive digital height maps of the land surface from SAR images. In recent years there has been great interest in exploiting the advanced multibaseline operation for solving layover effects that can degrade SAR and InSAR imagery. We consider detailed modelling of this problem including speckle noise for extended targets, appli... View full abstract»

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  • Shadow-feature-enhanced ML-CFAR detection for a Swerling 1 target in Weibull clutter

    Publication Year: 2001, Page(s):444 - 447
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB) | HTML iconHTML

    This paper describes a shadow-feature-enhanced technique for the maximum-likelihood CFAR (ML-CFAR) detector, which is known to have a low CFAR loss. A general 15 dB signal-to-clutter ratio detection enhancement for a shadow length of 5 bins is obtained for a Swerling 1 target in Weibull clutter across a wide range of detection rates View full abstract»

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  • SAR prescreening using both target and shadow information

    Publication Year: 2001, Page(s):147 - 152
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB) | HTML iconHTML

    The utility of fusing shadow and intensity detections in a SAR prescreener is evaluated over the MSTAR database. We use either power ratio, GLRT or two-parameter CFAR tests to extract the two detections. For any testing strategy, the addition of shadow information improves performance View full abstract»

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  • MSAG based MAE-UAV active array antenna

    Publication Year: 2001, Page(s):393 - 397
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB) | HTML iconHTML

    This paper summarizes the key enabling technologies developed during a three-year effort to design and demonstrate the advanced performance of a multi-function self-aligned gate (MSAG) MMIC-based MAE-UAV active array antenna. The antenna system was developed as prototype for future SATCOM and SAR antennas to be used aboard unmanned autonomous vehicles (UAV). This effort culminated in 1998 with a h... View full abstract»

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  • A multi-step selection procedure for estimating the number of signal components

    Publication Year: 2001, Page(s):129 - 134
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB) | HTML iconHTML

    This paper considers a multi-step selection procedure to estimate the multiplicity of the smallest eigenvalue of a covariance matrix. The unknown number of signals present in radar data can be formulated as the difference between the total number of components in the observed multivariate data vector and the multiplicity of the smallest eigenvalue. We propose a selection procedure R, to estimate t... View full abstract»

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  • Statistics of monopulse measurements of Rayleigh targets in the presence of specular and diffuse multipath

    Publication Year: 2001, Page(s):369 - 375
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB) | HTML iconHTML

    In tracking of low-elevation targets with a monopulse radar, the presence of reflections from the sea surface causes severe errors in the direction-of-arrival (DOA) measurements of the target. Since the target echoes that are received directly and via the sea surface are unresolved in time and frequency, tracking targets in the presence of sea-surface induced multipath is a special case of trackin... View full abstract»

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  • Bistatic surveillance concept of operations

    Publication Year: 2001, Page(s):75 - 80
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB) | HTML iconHTML

    Space-based radars are being considered for civilian and military surveillance of ground and air moving vehicles because of their worldwide field of regard, and their inherent potential for surveillance of locations denied to other radars for political or geographical reasons. Monostatic radars will provide detection and tracking of moving objects, but are limited by affordable aperture sizes to l... View full abstract»

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  • New techniques for radar coherent range ambiguity resolution

    Publication Year: 2001, Page(s):99 - 104
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB) | HTML iconHTML

    A new method of target coherent range ambiguity resolution is presented which is substantially different from previously proposed methods. The new target ranging eliminates the generation of target ghosts associated with most conventional techniques. A range-ambiguous radar with a medium to high pulse repetition frequency is assumed. Clutter is assumed to be present in multiple range intervals. Th... View full abstract»

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  • Simulation comparison of two selection procedures for detecting the number of signal components

    Publication Year: 2001, Page(s):306 - 310
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB) | HTML iconHTML

    Chen et al., (2000) developed a multi-step selection procedure to determine the number of signal components in radar measurements. We use Monte Carlo experiments to compare and contrast the performance of this method with the single-step selection procedure proposed by Chen and Wicks (2000). The simulations show that the multi-step selection procedure outperforms the single-step selection procedur... View full abstract»

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  • Bistatic reflectivity measurements at X, Ku, Ka and W-band frequencies

    Publication Year: 2001, Page(s):404 - 409
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB) | HTML iconHTML

    Data that realistically represents the phenomenology of bistatic reflectivity is essential to the design of radar systems intended to sense land based targets and low flying aircraft. A large database exists describing the response of X-band monostatic reflectivity, and limited data is available for X-band bistatic reflectivity. However, there is little data in the literature describing bistatic r... View full abstract»

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  • A novel approach for CFAR processors design

    Publication Year: 2001, Page(s):284 - 288
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB) | HTML iconHTML

    Two novel constant false alarm rate (CFAR) detectors, the And-CFAR and Or-CFAR, are proposed, The two new CFAR detectors improve the conventional cell averaging CFAR (CA-CFAR) and order statistics CFAR (OS-CFAR) by making full use of the cell information. The novel CFAR processors combine the result of the CA-CFAR and OS-CFAR to get a better detection performance. In a homogeneous background, the ... View full abstract»

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  • Enhancements of NP-3 UHF image quality using digital spotlighting technique

    Publication Year: 2001, Page(s):1 - 6
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB) | HTML iconHTML

    This paper is concerned with signal processing issues that are associated with foliage penetrating (FOPEN) USA Navy NP-3 ultra-wideband (UWB) synthetic aperture radar. The digital signal processors that were developed for the NP-3 data commonly used a radar beamwidth angle that was limited to 35 degrees. Provided that the NP-3 radar beamwidth angle was 35 degrees, the NP-3 SAR system would approxi... View full abstract»

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  • Selection of the radar waveform from tracking considerations

    Publication Year: 2001, Page(s):246 - 251
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB) | HTML iconHTML

    The conventional approach for tracking system design is to treat the sensor and tracking subsystems as completely independent units. However, the two subsystems can be designed jointly to improve system (tracking) performance. It is known that different radar signal waveforms result in very different resolution cell shapes (for example, a rectangle versus an eccentric parallelogram) in the range/r... View full abstract»

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  • The problem of kill assessment: a challenge for radar tracking systems

    Publication Year: 2001, Page(s):332 - 337
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB) | HTML iconHTML

    Both current and future problems of kill assessment are discussed from a surface navy perspective. The basic terminology of kill assessment is discussed in the introduction, which provides the pedestrian background to the common vocabulary. Some of the underlying sources of potential kill assessment information and aspects of current decision taking methodology is discussed in the section on endo-... View full abstract»

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