Proceedings of the 1997 IEEE National Radar Conference

13-15 May 1997

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  • Proceedings Of The 1997 IEEE National Radar Conference, May 13-15,1997, Syracuse, New York [front matter]

    Publication Year: 1997, Page(s):i - xvii
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    Freely Available from IEEE
  • An ultra-low sidelobe pulse compression technique for high performance radar systems

    Publication Year: 1997, Page(s):111 - 114
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A pulse compression technique based on deconvolution and linear prediction in the frequency domain is presented which offers approximately 20 dB improvement in time sidelobe performance compared to conventional matched filter and windowing techniques. The detection performance converges to that of a matched filter for weak signals, while the sidelobe level decreases to very low levels as a functio... View full abstract»

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  • Prevention of signal cancellation in an adaptive nulling problem

    Publication Year: 1997, Page(s):191 - 195
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (269 KB)

    Signal cancellation is a serious problem in adaptive nulling. The problem arises when the actual direction of arrival of the signal is slightly off the assumed direction of arrival. The adaptive algorithms consider the actual signal a jammer as the direction of arrival is not exactly specified. It is shown how to prevent signal cancellation when the direction of arrival is not known exactly. Multi... View full abstract»

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  • Proceedings of the 1997 IEEE National Radar Conference

    Publication Year: 1997
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    Freely Available from IEEE
  • A direct matrix approach to the adaptive nulling problem with multiple look directions utilizing the conjugant gradient method

    Publication Year: 1997, Page(s):284 - 288
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (278 KB)

    In adaptive nulling problems, signal cancellation can occur if the direction of arrival (DOA) of the signal of interest (SOI) is unknown and the desired look direction is slightly off the actual DOA. In this case, the signal is considered a jammer and nulled by the adaptive algorithms. Target returns from within a finite extent indicate the presence of a target. This paper investigates the additio... View full abstract»

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  • Accounting for the effects of mutual coupling in adaptive antennas

    Publication Year: 1997, Page(s):361 - 366
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (529 KB)

    This paper presents a method to account for the effects of mutual coupling in least squared error adaptive algorithms. The mutual coupling is quantized using the method of moments. The method of moments admittance matrix is used to compensate for the mutual coupling. View full abstract»

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  • Conference Author Index

    Publication Year: 1997, Page(s): 379
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    Freely Available from IEEE
  • Over-the-horizon radar sensitivity enhancement by impulsive noise excision

    Publication Year: 1997, Page(s):252 - 256
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    This paper describes a signal processing algorithm that increases radar sensitivity by as much as 20 dB, after excising noise impulses, such as those caused by lightning, from the temporal data stream at the receiver output. The work was performed at the California-based Wide Aperture Research Facility (WARF) high-frequency (HF) over-the-horizon radar (OTHR) for enhancement of the U.S. Navy reloca... View full abstract»

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  • Side zone automotive radar

    Publication Year: 1997, Page(s):186 - 190
    Cited by:  Papers (2)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A side detection system (SDS) based on radar technology for automotive applications is introduced. The functional requirements of such a system are described and the resulting safety enhancement benefits are summarized. Also, the nature of the radar environment for the side zone application is reviewed in qualitative terms. Minimizing the cost is a necessary system design driver, and presents a co... View full abstract»

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  • Wind detection in a microcosm: ship/aircraft environment sensors

    Publication Year: 1997, Page(s):246 - 251
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    One of the most demanding aspects of a Navy helicopter pilot's job is landing his aircraft on the flight deck of a pitching, rolling, heaving and yawing ship. The complex airwake velocity field associated with the ship and aircraft interface directly affects the pilot's ability to control the aircraft during takeoff, approach, hover, landing, and deck operations. Dynamic interface (DI) testing is ... View full abstract»

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  • Non-Gaussian clutter modeling and application to radar target detection

    Publication Year: 1997, Page(s):240 - 245
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The performance of a Gaussian receiver in non-Gaussian clutter is significantly inferior to that of an optimum receiver for the detection of weak targets. Knowledge of the clutter distribution is a key element to obtaining improved performance. This requires the specification of a suitable multivariate non-Gaussian probability density function (PDF) for the clutter. Spherically invariant random ve... View full abstract»

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  • Ionospheric effects on synthetic aperture radar at VHF

    Publication Year: 1997, Page(s):237 - 239
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    Synthetic aperture radars (SAR) operated from airplanes have been used at very high frequency (VHF) because of their enhanced foliage and ground penetration compared to radars operated at higher frequencies. A satellite-borne VHF SAR would have considerable utility but in order to operate with high resolution it would have to use both a large relative bandwidth and a large aperture. The presence o... View full abstract»

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  • Zpatch. A high frequency bistatic signature prediction code

    Publication Year: 1997, Page(s):232 - 236
    Cited by:  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    This paper describes a high frequency bistatic radar cross section (RCS) prediction computer code called “Zpatch” which is based on the high frequency technique of shooting and bouncing rays. A modern computer graphics technique called “z-buffering” is used for rapid solution of the line-of-sight hidden surface problem. Zpatch is capable of generating monostatic and bistati... View full abstract»

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  • A study on 94 GHz band millimeter-wave RCS characteristics: numerical comparison with 35 GHz

    Publication Year: 1997, Page(s):172 - 177
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    This paper presents numerical results of 94 GHz radar cross section (RCS) characteristics for the purpose of signal-to-clutter ratio (S/C) enhancement feasibility study. Our analysis method is an electromagnetic field integral equation based on physical optics and a random rough surface with perfect conductivity is postulated as the scatterer. It is found that the RCS at 94 GHz is independent of t... View full abstract»

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  • Millimeter wave Rotman lens

    Publication Year: 1997, Page(s):78 - 81
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    A millimeter wave Rotman lens was developed that operates at frequencies between 33 GHz and 37 GHz with the potential of being implemented in metallized plastic. Various lens designs were evaluated with a computer model based on the contour integral method. The best lens design was manufactured and characterized by measuring the scattering parameters between the beam and array ports within the fre... View full abstract»

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  • Detection of ships using OTH radar with short integration times

    Publication Year: 1997, Page(s):1 - 6
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Localizing and tracking ocean-going ships using high-frequency over-the-horizon radar (OTHR) currently requires long coherent integration times (CITs) and places critical demands on scarce radar resources. Here, modern spectral analysis techniques (MSATs) are employed to localize ships from clutter and noise in Doppler space using shorter CITs than are possible with standard Fourier techniques. Do... View full abstract»

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  • Experiments in bistatic scattering phenomenology

    Publication Year: 1997, Page(s):154 - 159
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    This paper describes a fully-polarimetric bistatic radar test bed system developed for large bistatic angle scattering studies of aircraft targets and terrain surfaces. The radar consists of a high power (1 MW) S-band transmitter and a remote, dual-polarized receiver separated from each other over baseline distances up to 30 km. The transmitter emits vertically (V) and horizontally (H) polarized p... View full abstract»

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  • High resolution radar models for joint tracking and recognition

    Publication Year: 1997, Page(s):99 - 104
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    Identification of airborne or ground targets using high resolution radar (HRR) range-profiles is a notoriously difficult problem, due in large part to the extreme variability of the range-profile for small changes in target aspect angle. We address the problem of joint tracking and recognition of a target using a sequence of HRR range-profiles within a likelihood-based framework. The likelihood fu... View full abstract»

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  • Impact of near-field scattering on multichannel airborne radar measurements (MCARM)

    Publication Year: 1997, Page(s):227 - 231
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    One of the critical factors which limits the clutter and jammer suppression performance of the adaptive phased array radar is the near-field scattering effects from the antenna-aircraft interactions. In this paper, we present the impact of near-field scattering on space-time adaptive processing performance by modeling the BAC 1-11 aircraft and the multichannel airborne radar measurements array usi... View full abstract»

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  • Wide area surveillance concepts based on geosynchronous illumination and bistatic unmanned airborne vehicles or satellite reception

    Publication Year: 1997, Page(s):126 - 131
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    This paper describes a space-based radar surveillance concept employing geosynchronous illumination and bistatic reception on either unmanned airborne vehicles (UAVs) or low-orbit satellites. Two classes of surveillance are considered: that of aircraft targets (generically designated as “airborne moving target indication” or AMTI) and that of slow-moving ground targets (generically des... View full abstract»

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  • Detection of spectral lines using eigencoefficients

    Publication Year: 1997, Page(s):31 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    We discuss a detection problem based on a Cramer (1940) spectral representation for a widesense stationary random process. Development of the Cramer representation culminates in determination of a smoothed power spectral density estimate expressed completely in terms of observable expansion coefficients where the basis functions consist of discrete prolate spheroidal wave functions. Using these co... View full abstract»

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  • Performance of distributed CFAR tests in nonhomogeneous background

    Publication Year: 1997, Page(s):36 - 41
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    We evaluate the performance of several distributed CFAR tests operating in nonhomogeneous background conditions. The analysis considers the detection of Rayleigh target in Rayleigh clutter with the possibility of differing clutter power levels in the test cells of distributed radars. The tests considered include the previously defined maximum order statistic detector (MOS), belonging to a class of... View full abstract»

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  • Real-time multichannel airborne radar measurements

    Publication Year: 1997, Page(s):138 - 142
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    This paper describes a series of airborne radar experiments that were performed using an active aperture digital beamforming phased array radar designed to demonstrate real time space-time adaptive processing on an Intel high performance computer View full abstract»

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  • VI-CFAR: a novel CFAR algorithm based on data variability

    Publication Year: 1997, Page(s):263 - 268
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    The VI-CFAR processor performs adaptive threshold target detection using a composite approach based on the well known CA-CFAR, SO-CFAR, and GO-CFAR background estimation algorithms. After envelope detection, radar range samples are stored in a tapped delay line such that a test cell is surrounded on either side by a set of reference cells. The VI-CFAR dynamically chooses either the leading referen... View full abstract»

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  • Adaptive beamforming for wideband jamming cancellation

    Publication Year: 1997, Page(s):82 - 87
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    This paper presents two important results of our recent studies on adaptive wideband beamforming using subarrays and linear frequency modulation (LFM) for high resolution target image. By transmitting periodical sweeping waveforms, the received non-coherent signals, such as jammers, become nonstationary and therefore require special treatment to predict the system performance analytically. We appr... View full abstract»

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