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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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  • A spectral approach to image-enhanced moving target radar detection

    Publication Year: 2001, Page(s):31 - 34
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB) | HTML iconHTML

    A difficult problem with ground moving target radar (GMTI) detection is how to consistently track targets moving through non-homogeneous regions of clutter such as forest and urban boundaries. Although attempts have been made to mitigate this detection problem using terrain mapping data, such data does not give current clutter information due to change in vegetation, roads, buildings, and seasonal... View full abstract»

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  • The spectrum of a digital radio frequency memory linear range gate stealer electronic attack signal

    Publication Year: 2001, Page(s):27 - 30
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB) | HTML iconHTML

    We examine the spectrum of a digital radio frequency memory (DRFM) linear rate gate stealer (RGS) electronic attack (EA) signal. The spectrum has two noticeable characteristics. The first is a small, yet measurable, center frequency shift from the input center frequency. The second is the presence of harmonics (spectral lines) of significant magnitude centered on either side of the shifted center ... 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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  • Digitization requirements for digital radar arrays

    Publication Year: 2001, Page(s):163 - 168
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB) | HTML iconHTML

    As the increasing digitization of radars progresses towards the antenna, this paper explores how digital the antenna of a phased-array radar must be in order to meet particular performance requirements. This paper addresses the often asked questions “how many digital subarrays are needed” and “is element-level digitization required”? View full abstract»

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  • Netted radar sensing

    Publication Year: 2001, Page(s):23 - 26
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB) | HTML iconHTML

    We consider how networks of radar sensors can offer a counter to stealth technology whilst simultaneously providing more detailed information for improved target classification. Specifically, it is shown how multiple independent sensors can provide an energetically more efficient collector of radar scatter. Further, the relative merits of non-coherent and coherent dependent networks are discussed ... View full abstract»

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  • Sidelobe reduction through subarray overlapping for wideband arrays

    Publication Year: 2001, Page(s):228 - 233
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB) | HTML iconHTML

    For wideband arrays, the contiguous subarray architecture using phase shifters at the element level and true time delays at the subarray level results in higher sidelobes due to subarray dispersion and grating-lobe generation. Sidelobe reduction using overlapping subarray architecture is discussed. The architecture is effectively applied to an experimental AMRF-C (Advanced Multifunction RF Concept... View full abstract»

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  • A general signal processing algorithm for MTI with multiple receive apertures

    Publication Year: 2001, Page(s):315 - 320
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB) | HTML iconHTML

    Moving target indication (MTI) is demonstrated for general antenna arrays, especially sparse 3D arrays. The framework for space-time adaptive processing (STAP) is generalized to include frequency (fast-time) data and array elements offset in cross track dimensions. The degrees of freedom (rank) needed to represent clutter are derived for general systems. The clutter rank compared to the number of ... 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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  • Development of a digital array radar (DAR)

    Publication Year: 2001, Page(s):157 - 162
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB) | HTML iconHTML

    Twenty-first century littoral and open-sea missions present USA Navy (USN) shipboard-radar systems with the challenge of detecting small targets in severe clutter and against multiple sources of interference. In fiscal year 2000 (FY00), the Office of Naval Research (ONR) sponsored a program to develop an active array radar that includes a digital beamforming (DBF) architecture. The DBF radar syste... View full abstract»

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  • Dominant scatterer identification testing with an integrated X-band radar system

    Publication Year: 2001, Page(s):18 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB) | HTML iconHTML

    Radar return data from airborne jet aircraft were collected and analyzed to determine the presence of consistent, dominant radar returns of point scatterers on aircraft simulating landing conditions. These measurements were performed by integrating two separate X-band radars into one system with the ability to simultaneously track and image aircraft. Selected processed data from both radar systems... 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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  • A novel threshold optimization for distributed OS-CFAR of multistatic radar systems by using the genetic algorithm

    Publication Year: 2001, Page(s):275 - 278
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB) | HTML iconHTML

    Distributed order statistics constant false alarm rate (OS-CFAR) detection techniques are important for nonstationary observation with varying weak narrowband random signals. However, it is very difficult to choose system parameters to obtain optimal threshold values because of the nonlinear property of the distributed OS-CFAR detection system. This paper provides a novel solution based on an effe... View full abstract»

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  • Adaptive detection in dense target environments

    Publication Year: 2001, Page(s):187 - 192
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB) | HTML iconHTML

    We consider the impact of target signals corrupting the covariance estimate when implementing STAP in ground moving target indication (GMTI) scenarios. Herein, we propose a model for seeding the radar data cube with target signals and calculate both asymptotic and finite training data detection losses. In general, both the location and strength of the corruptive target signals influence performanc... View full abstract»

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  • GMTI performance of ΣΔ-STAP for a forward-looking radar

    Publication Year: 2001, Page(s):258 - 263
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB) | HTML iconHTML

    The GMTI performance of ΣΔ-STAP for a forward looking phased array radar is analyzed using the simulation tool RLSTAP. ΣΔ-STAP processes the returns from sum and difference antenna channels. When used in conjunction with partially adaptive STAP methods ΣΔ-STAP is shown to achieve good GMTI performance View full abstract»

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  • Adaptive minimax robust M-beamforming for multiple moving sources and impulse noise

    Publication Year: 2001, Page(s):222 - 227
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB) | HTML iconHTML

    The windowed multiple source M-beamforming and M-estimates of the direction-of-arrival (DOA) are developed for source visualization and nonparametric high-resolution tracking of rapidly moving sources. These M-beamforming and M-estimates are robust with respect to impulse random errors having a unknown heavy-tailed distribution. The beamforming and estimates are defined by minimizing a nonquadrati... View full abstract»

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  • Omega-k quadtree UWB SAR focusing

    Publication Year: 2001, Page(s):311 - 314
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    A variation on the quadtree algorithm for ultra-wideband, wide-angle (UWB-WA) SAR imaging that uses the ω-k algorithm for final stage focusing is introduced. Several signal processing techniques appropriate to the requirements of UWB-WA SAR, and that prevent errors and artifacts in the ω-k focusing are reviewed. These techniques include spatial and temporal shifts for spotlight data, e... View full abstract»

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  • Determinations of aircraft position and orientation from images of a millimetric surface radar

    Publication Year: 2001, Page(s):457 - 461
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB) | HTML iconHTML

    The present work mainly deals with the determination of geometrical and kinematics parameters by the processing of images gathered from a high-resolution radar sensor. The aim of this application is to determine the orientation and the position of aircraft in an Advanced Surface Movement Guidance and Control (A-SMGCS) environment. The radar sensor is a prototype operating in the millimetre band (9... View full abstract»

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  • Ocean wave observation by CW mm-wave radar with narrow beam

    Publication Year: 2001, Page(s):398 - 403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB) | HTML iconHTML

    A new ocean wave spectra observation method applied to intermittent back specula reflecting signal obtaining from a narrow radio beam spot on the water wave surface is proposed. The method uses a shipborne BBM CW mm wave Doppler radar with narrow beam. The wave spectra and velocity component are directly obtained from the received Doppler signal. Moreover the wave traveling direction and wave vect... View full abstract»

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  • New results on minimum-PSL binary codes

    Publication Year: 2001, Page(s):153 - 156
    Cited by:  Papers (21)  |  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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  • Test results from the AN/APY-6 SAR/GMTI surveillance, tracking and targeting radar

    Publication Year: 2001, Page(s):13 - 17
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB) | HTML iconHTML

    The AN/APY-6 is an X-band radar developed by Northrop Grumman under ONR (Office of Naval Research) sponsorship. It was developed to provide all-speed target detection, location, tracking, imaging and exploitation. It was installed in a USA Navy NP-3 aircraft in July 1999 and continues to undergo testing and demonstration in the NP-3. This paper presents test results in the form of SAR, GMTI and tr... View full abstract»

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  • Experimental results for adaptive radar imaging in a wide angular sector

    Publication Year: 2001, Page(s):326 - 331
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB) | HTML iconHTML

    We investigate experimentally an adaptive imaging approach, namely that of a synthetic wideband, stepped CW transmitter and a multichannel adaptive array for receiving backscattered energy from short range objects in a full +/-90 degree field of view. The method is a hybrid one, using conventional Fourier processing for range and is adaptive in angle. The 12-element linear array that was construct... View full abstract»

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  • PEOD: Pade estimated optimum (radar) detector

    Publication Year: 2001, Page(s):270 - 274
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB) | HTML iconHTML

    An expression for the optimum non-Gaussian radar detector is derived from the non-Gaussian SIRP model (spherically invariant random process) clutter and a Pade approximation of the characteristic function of the SIRP. The SIRP model is used to perform coherent detection and to modelize the non-Gaussian clutter as a complex Gaussian process whose variance is itself a positive random variable (r.v.)... 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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