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Proceedings of the 2002 IEEE Radar Conference (IEEE Cat. No.02CH37322)

25-25 April 2002

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  • Proceedings of the 2002 IEEE Radar Conference (IEEE Cat. No.02CH37322)

    Publication Year: 2002
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    Freely Available from IEEE
  • Author index

    Publication Year: 2002, Page(s):507 - 508
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    Freely Available from IEEE
  • Monte Carlo simulation of ionospheric scintillation

    Publication Year: 2002, Page(s):350 - 355
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB) | HTML iconHTML

    The ionosphere is an important consideration in the design of radars, especially those that operate at UHF frequency and below. A statistical model of ionospheric scintillation is developed on the basis of data analysis and known empirical results. From a mathematical point of view, we model the effect of scintillation on radar signals via a constructed stationary random process. The complex PDF a... View full abstract»

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  • Deconvolution approach to terrain scattered interference mitigation

    Publication Year: 2002, Page(s):344 - 349
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB) | HTML iconHTML

    Terrain scattered interference or hot clutter is a problem in radar ECCM, especially for airborne radar with low sidelobe antennas and conventional adaptive sidelobe cancellation. A deconvolution approach is proposed to mitigate terrain scattered interference. This approach is based on obtaining an estimate of the complex multipath impulse response from a short time interval in the received signal... View full abstract»

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  • SAR image formation uncorrupted by multiple-bounce artifacts

    Publication Year: 2002, Page(s):338 - 343
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (701 KB) | HTML iconHTML

    This analysis develops an innovative image reconstruction technique for synthetic aperture radar (SAR) based upon the removal of multiple-bounce (MB) artifacts. The basic concept is that the phase history measurements include the realistic effects of MB interactions. These measured phase history data are decomposed into contributions due to the desired single-bounce (SB) scattering events and the ... View full abstract»

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  • Application of polarimetric synthetic aperture radar interferometry for land cover classification

    Publication Year: 2002, Page(s):459 - 463
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (471 KB) | HTML iconHTML

    The development of radar polarimetry and radar interferometry is advancing rapidly. The textural fine structure, target orientation, system metrics and material constituents can be recovered with radar polarimetry; while with radar interferometry, the elevation structure of a target can be explored. Polarimetric synthetic aperture radar interferometric (Pol-InSAR) is interferometry between all pos... View full abstract»

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  • Multifractal features of sea clutter

    Publication Year: 2002, Page(s):500 - 505
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (602 KB) | HTML iconHTML

    Sea clutter refers to the backscattered returns from a patch of the sea surface illuminated by a transmitted radar pulse. Since the complicated sea clutter signals depend on the complex wave motions an the sea surface, it is reasonable to study sea clutter from nonlinear dynamics, especially chaos, point of view, instead of simply based on random processes. In the past decade, Dr. Simon Haykin's (... View full abstract»

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  • The dynamics and radar cross section density of chaff clouds

    Publication Year: 2002, Page(s):278 - 285
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (678 KB) | HTML iconHTML

    A new chaff cloud model is described which is based on fundamental principles with modifications based on laboratory observations. Excellent approximations to the exact physical model have been developed which can rapidly predict the chaff fiber density and orientation as a function of location, time and fiber characteristics. Using this information, the time varying RCS density is determined for ... View full abstract»

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  • Projection approach for STAP

    Publication Year: 2002, Page(s):397 - 402
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (563 KB) | HTML iconHTML

    The sample support problem in space-time adaptive processing (STAP) applications arises from the requirement to adapt many spatial and temporal degrees-of-freedom (DOF) to a changing interference environment that includes clutter and jammers. Often, in heterogeneous overland strong clutter environments, the available wide sense stationary sample support is severely limited to preclude the direct i... View full abstract»

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  • Statistical analysis of the nonhomogeneity detector for non-Gaussian interference backgrounds

    Publication Year: 2002, Page(s):304 - 310
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (661 KB) | HTML iconHTML

    We derive the nonhomogeneity detector (NHD) for non-Gaussian interference scenarios and present a statistical analysis of the method. The non-Gaussian interference scenario is assumed to be modeled by a spherically invariant random process (SIRP). We present two methods for selecting representative (homogeneous) training data based on our statistical analysis of the NHD for finite sample support u... View full abstract»

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  • Chaotic behaviour and non-linear prediction of airborne radar sea clutter data

    Publication Year: 2002, Page(s):331 - 337
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB) | HTML iconHTML

    The potential to model sea clutter radar returns using chaos theory is examined. Chaotic systems display qualitative similarities to sea clutter returns such as broad flat spectra, boundedness and irregular temporal behaviour. In this report several key parameters of chaotic systems, namely correlation dimension, Lyapunov spectrum and Lyapunov dimension are calculated from real sea clutter returns... View full abstract»

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  • Bistatic STAP: application to airborne radar

    Publication Year: 2002, Page(s):1 - 7
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (661 KB) | HTML iconHTML

    We investigate bistatic STAP performance. We show that typical bistatic clutter environments appear nonstationary. Nonstationary behavior exacerbates STAP implementation. In the absence of corrective measures, SINR losses due to covariance estimation error approaches 30 dB for the numerical examples considered herein. Using localized STAP processing coupled with a time-varying weight procedure, we... View full abstract»

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  • A new complementary waveform technique for radar signals

    Publication Year: 2002, Page(s):35 - 40
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB) | HTML iconHTML

    A new phase coding technique for radar signals is introduced which uses novel complementary waveforms constructed to have optimal sidelobe performance. The waveforms are constructed using a modification of the Prometheus orthonormal set (PONS) technique. An advantage of a PONS matrix is that it allows for many complementary pairs of waveforms to choose from as well as allowing for multiple pairs t... View full abstract»

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  • Development of a chaotic signal radar system for vehicular collision-avoidance

    Publication Year: 2002, Page(s):227 - 232
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (443 KB) | HTML iconHTML

    The paper describes the development of a new type of radar system called Chaotic Signal Radar (CSR), which utilises truly random signals for the modulation and a novel implicit sampling averaging algorithm in the receiver. The paper presents the results of simulation study in conjunction with the real measurements using a prototype CSR. View full abstract»

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  • Technique for frequency analysis of unevenly sampled radar data

    Publication Year: 2002, Page(s):63 - 67
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (473 KB) | HTML iconHTML

    A new technique is described that generalizes the usefulness of the discrete Fourier transform for spectral analysis of radar data to applications where the discrete data points to be analyzed are not sampled at regular intervals and/or do not have equal statistical weight. This method finds a frequency-domain representation which best represents the given time-domain data in the least-square-resi... View full abstract»

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  • FOPEN SAR imaging of ground moving targets using rotational time-frequency-radon transforms

    Publication Year: 2002, Page(s):154 - 159
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (659 KB) | HTML iconHTML

    In this paper, we introduce the basic concept of the rotational Fourier transform, the bilinear rotational time-frequency transforms, and the Radon transform. Based on a certain model of radar returns from moving targets, we propose a method using a rotational time-frequency-Radon transform for synthetic aperture radar imaging of moving targets in foliage. View full abstract»

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  • Analytical and computer model of a Doppler weather radar system

    Publication Year: 2002, Page(s):438 - 444
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB) | HTML iconHTML

    With advances in Doppler weather radar, severe storm and tornado detection has improved greatly. However, the resolution limitations of deployed radar systems can still limit severe storm detection. In the case of larger tornadoes, characteristic abrupt changes in wind direction can usually be detected between adjacent range-angle bins. However for smaller tornadoes, the rotating cell may be conta... View full abstract»

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  • Nonuniform sampling reconstruction applied to sparse array beamforming

    Publication Year: 2002, Page(s):98 - 103
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (585 KB) | HTML iconHTML

    We investigate the application of nonuniform sampling reconstruction to sparse array beamforming to gain insight into its potential and identify additional challenges. The central concept of the nonuniform sampling beamformer is to use the nonuniform samples to reconstruct the samples of a uniform array with the same sampling density as the nonuniform array and then perform conventional beamformin... View full abstract»

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  • A polarimetric adaptive detector in non-Gaussian noise

    Publication Year: 2002, Page(s):471 - 477
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB) | HTML iconHTML

    We address polarimetric adaptive detection of targets embedded 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. We resort to a design procedure based upon the generalized likelihood ratio test (GLRT): first we derive the GLRT assumin... View full abstract»

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  • Frequency estimation accuracy of ROCKET

    Publication Year: 2002, Page(s):14 - 17
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB) | HTML iconHTML

    We assess the frequency estimation accuracy of the recently introduced reduced rank autoregressive linear predictor called reduced order correlation kernel estimation technique (ROCKET). We compare the frequency estimation performance of ROCKET to both the conventional full rank autoregressive (FR-AR) method and the theoretical limit imposed by the Cramer-Rao bound (CRB). The analysis includes est... View full abstract»

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  • Radar breadboard for DSP scatterometer

    Publication Year: 2002, Page(s):168 - 175
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1560 KB) | HTML iconHTML

    The design and test results for the radio frequency (RF) portion of a breadboard polarimetric scatterometer operating at 13.402 GHz are presented. To evaluate the feasibility of a programmable digital signal processing (DSP) approach for a follow-on scatterometer similar to SeaWinds an integrated breadboard has been developed at the Jet Propulsion Laboratory (JPL). Early breadboards of this type h... View full abstract»

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  • Frequency estimation of the sinusoidal signals with unknown lowpass envelopes based on the eigenanalysis

    Publication Year: 2002, Page(s):453 - 458
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (446 KB) | HTML iconHTML

    In this paper, the frequency estimation of the sinusoidal signals with unknown lowpass envelope is addressed. Due to mismodeling, the performance of the conventional subspace-based method degrades significantly in these cases. By developing the method applied to the parametric localization of distributed sources, an eigenanalysis-based method is proposed for the frequency estimate. The comparisons... View full abstract»

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  • A new solution to polarimetric radar discrimination problem

    Publication Year: 2002, Page(s):484 - 487
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (394 KB) | HTML iconHTML

    A new solution is proposed for polarimetric radar discrimination problem by using cross-entropy to measure the difference between two scatterers. Two cross-entropy measures in favor of one scatterer over another are obtained for two independent probability mass functions that indicate the average scattering mechanism and the scattering randomness, respectively. These probability mass functions are... View full abstract»

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  • On the properties and efficiency of the SIFFT SAR processing algorithm

    Publication Year: 2002, Page(s):187 - 193
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (679 KB) | HTML iconHTML

    Burst-mode data is obtained when a SAR system is operated in ScanSAR mode. First, a detailed description of the characteristics of the received burst-mode data is given. We then investigate the properties of the short IFFT (SIFFT) burst-mode processing algorithm and its input and output target space. A survey on the arithmetic of the SIFFT algorithm using the inverse momentary Fourier transform (I... View full abstract»

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  • A motion model for tracking highly maneuvering targets

    Publication Year: 2002, Page(s):493 - 499
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB) | HTML iconHTML

    Mehrotra developed a jerk model for tracking highly maneuvering targets in 1997, which include terms at the most up to the third order derivatives of target position. The model is investigated in this paper. By theoretical analysis, it is shown that the filter, which based on the jerk model, may suffer from deterministic steady state estimation deviations. To find a way out of this question, a cur... View full abstract»

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