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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 (5)  |  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 (3)
    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
  • Performance analysis of reduced-rank STAP

    Publication Year: 1997, Page(s):42 - 47
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The space-time radar problem is well suited to the application of techniques that take advantage of the low-rank property of the space-time covariance matrix. In particular, it was shown that when the space-time covariance matrix is estimated from a dataset with limited support, reduced-rank methods outperform full-rank space-time adaptive processing (STAP). We study the application of several red... 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 (18)
    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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  • Algorithm development for an airborne real-time STAP demonstration

    Publication Year: 1997, Page(s):331 - 336
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    A description of STAP algorithms used in the May 1996 Real Time Multichannel Airborne Radar Measurement (RT-MCARM) program is presented. The system collected and processed IF sampled data from 16 phased array radar receiver channels, performing IF to baseband conversion, Doppler processing, adaptive clutter cancellation, pulse compression, and formation of multiple receive beams within an intentio... View full abstract»

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  • Knowledge-based space-time adaptive processing

    Publication Year: 1997, Page(s):372 - 377
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    This paper describes an innovative concept for knowledge-based control of space-time adaptive processing (STAP). The knowledge-based approach holds potential for significant performance improvements over classical STAP processing in non-homogeneous environments by taking advantage of a priori knowledge. Under this approach, knowledge-based control is used to direct pre-adaptive filtering, and to c... View full abstract»

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  • Optimal target identification based upon ultra high resolution radar profiles

    Publication Year: 1997, Page(s):278 - 283
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A new methodology for identifying aircraft using high range resolution radar is developed. The identifier maximizes the probability of target identification in dependent complex Gaussian noise, without being forced to decide from a limited number of categories. The results from experiments using ultra high range resolution (HRR) data demonstrates the fact that the proposed identifier provides a re... View full abstract»

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  • Millimeter wave Rotman lens

    Publication Year: 1997, Page(s):78 - 81
    Cited by:  Papers (6)
    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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  • Space/time adaptive processing architecture implementations using a high performance scalable computer

    Publication Year: 1997, Page(s):325 - 330
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    Pre and post-Doppler STAP architectures are considered for a target implementation on an Analog Devices super-Harvard architecture (SHARC) based high performance scalable computer utilizing a MyrinetTM communications network. Mapping and partitioning tasks perform an initial feasibility and sizing analysis for an implementation which performs both architectures on the same hardware. Fur... View full abstract»

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  • Radar target detection in chaotic clutter

    Publication Year: 1997, Page(s):367 - 371
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The detection of targets in chaotic clutter is considered. Of particular interest in target detection is one of weak signal detection. The usual approach to signal detection amidst clutter is to model the clutter as a stochastic process with a certain probability distribution, for example, the K-distribution. The Bayesian approach to decision theory is then used to detect the presence of targets. ... View full abstract»

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  • A self-correcting loop for joint estimation-calibration in adaptive radar

    Publication Year: 1997, Page(s):320 - 324
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    It is well known that pointing and random angle errors degrade the performance of adaptive radar quickly. A joint adaptive estimation-calibration (JEC) algorithm is proposed to provide on-line look direction corrections and array calibration. The new algorithm is presented in the context of a generalized sidelobe canceler (GSC). The proposed algorithm uses the array output to generate a control si... 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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  • Superresolution for scanning antenna

    Publication Year: 1997, Page(s):306 - 308
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    The MUSIC algorithm has been used widely in radar applications with spatially distributed sensor arrays. In those applications, the algorithm depends on the phase relations of the returned signal at different target pointing angles. Accordingly, many people believe that with a single narrow-beam antenna that is step-scanned in angle, the MUSIC algorithm cannot be used to superresolve target positi... View full abstract»

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  • Improved over-the-horizon radar accuracy for the counter drug mission using coordinate registration enhancements

    Publication Year: 1997, Page(s):132 - 137
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    For the relocatable over the horizon radar (ROTHR) counter-drug radar system accurate knowledge of target position is an important part of the detection and interdiction of drug smuggling aircraft. An improvement in the radar's target track positional accuracy has been obtained by using external reference sources at known locations in the radar coverage area. Tracks formed on these reference sourc... 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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  • On the influence of coordinate transform upon measurement error of distributed system

    Publication Year: 1997, Page(s):272 - 277
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Coordinate transformations are always of concern in the data processing of distributed systems such as radar, ECCM, and satellite location. The influence of coordinate transformations upon the measurement errors of the distributed sensor system is discussed. Detail derivations of the relation equation between the original coordinate system and the transformed new one, quantitative analysis of the ... 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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  • 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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  • Space time adaptive processing for a carrier based airborne early warning radar system

    Publication Year: 1997, Page(s):66 - 71
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    This paper addresses the use of space time adaptive processing (STAP) for clutter and jamming mitigation in a carrier based airborne early warning (AEW) radar system. A UHF, low PRF radar serves as a baseline for the radar parameters used in this paper for system requirements and performance comparisons. Performance comparisons of alternative STAP architectures supported by broadband measured ante... 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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