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IEEE Transactions on Aerospace and Electronic Systems

Issue 3 • July 2001

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Displaying Results 1 - 25 of 30
  • Bearings-only tracking of maneuvering targets using a batch-recursive estimator

    Publication Year: 2001, Page(s):770 - 780
    Cited by:  Papers (37)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB) | HTML iconHTML

    We present a new batch-recursive estimator for tracking maneuvering targets from bearings-only measurements in clutter (i.e., for low signal-to-noise ratio (SNR) targets), Standard recursive estimators like the extended Kalman Iter (EKF) suffer from poor convergence and erratic behavior due to the lack of initial target range information, On the other hand, batch estimators cannot handle target ma... View full abstract»

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  • Detecting moving targets in SAR imagery by focusing

    Publication Year: 2001, Page(s):794 - 809
    Cited by:  Papers (103)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB) | HTML iconHTML

    A new method for detecting moving targets in a synthetic aperture radar (SAR) image is presented. It involves segmenting a complex-valued SAR image into patches, focusing each patch separately, and measuring the sharpness increase in the focused patch. The algorithm is sensitive to azimuth velocities and is exquisitely sensitive to radial accelerations of the target, allowing it to detect motion i... View full abstract»

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  • Fast data association using multidimensional assignment with clustering

    Publication Year: 2001, Page(s):898 - 913
    Cited by:  Papers (26)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1051 KB) | HTML iconHTML

    We present a fast data association technique based on clustering and multidimensional assignment algorithms for multisensor-multitarget tracking Assignment-based methods have been shown to be very effective for data association. Multidimensional assignment for data association is an NP-hard problem and various near-optimal modifications with (pseudo-)polynomial complexity have been proposed. In mu... View full abstract»

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  • Equations of motion for a two-axes gimbal system

    Publication Year: 2001, Page(s):1083 - 1091
    Cited by:  Papers (22)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB) | HTML iconHTML

    Equations of motion for the two-axes yaw-pitch gimbal configuration are discussed on the assumption that the gimbals are rigid bodies and have no mass unbalance. The equations are derived and different terms are brought together into separate groups for the sake of clarity and to facilitate certain interpretations. Different kinds of disturbances and their elimination or reduction are discussed, a... View full abstract»

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  • Impact of clutter spectra on radar performance prediction

    Publication Year: 2001, Page(s):1022 - 1038
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (865 KB) | HTML iconHTML

    The effect on radar detection of the shape of the Doppler spectrum of windblown vegetated ground clutter is analyzed. An extensive experimental campaign carried out by MIT Lincoln Laboratory showed the shape of the windblown clutter Doppler spectrum to be exponential, in contrast to two other widely-used spectral models (i.e., Gaussian and power-law). The detection performance of two classes of su... View full abstract»

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  • ZVT boost converter using a ZCS auxiliary circuit

    Publication Year: 2001, Page(s):889 - 897
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB) | HTML iconHTML

    A soft switching boost converter with zero-voltage transition (ZVT) main switch using zero-current switching (ZCS) auxiliary switch is proposed. Operating intervals of the converter are presented and analyzed. Design considerations are discussed. A design example with experimental results obtained from a 600 W, 100 kHz, 380 V output, power factor corrected, ac-to-dc, boost converter using insulate... View full abstract»

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  • Simulation of a 6/4 switched reluctance motor based on Matlab/Simulink environment

    Publication Year: 2001, Page(s):989 - 1009
    Cited by:  Papers (117)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1240 KB) | HTML iconHTML

    A Matlab/Simulink environment to simulate a 6/4-switched reluctance motor is described. From its linear model to the nonlinear model, its dynamics is described and discussed in detail. All simulations are completely documented by their block diagrams and corresponding special Matlab functions and parameters quickly develop its model to the reader. Based on the developed model, simulation studies a... View full abstract»

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  • Negative correlation and optimal tracking with Doppler measurements

    Publication Year: 2001, Page(s):1117 - 1120
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB) | HTML iconHTML

    In target tracking systems that utilize Doppler radar (or sonar), the measurements consist of range, range rate, and one or two angles, When multiple sensors are used in the proper geometry, the final accuracy is determined primarily by each sensor's range estimation accuracy. In this case it is particularly important to extract the most accurate state estimate in the range direction by processing... View full abstract»

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  • Flexible loop filter design for spacecraft phase-locked receivers

    Publication Year: 2001, Page(s):957 - 964
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB) | HTML iconHTML

    A flexible loop filter design for spacecraft phase-locked receivers is proposed. The loop filter is implemented as digital hardware with coefficients that are set by registers. Either a perfect or an imperfect integrating loop filter can be effected. This flexibility is important since not one type of loop filter is preferred for all circumstances. An imperfect integrator is preferred when, as is ... View full abstract»

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  • Predicting an upper bound on SAR ATR performance

    Publication Year: 2001, Page(s):876 - 888
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1160 KB) | HTML iconHTML

    We present a method for predicting a tight upper bound on performance of a vote-based approach for automatic target recognition (ATR) in synthetic aperture radar (SAR) images. In such an approach, each model target is represented by a set of SAR views, and both model and data views are represented by locations of scattering centers. The proposed method considers data distortion factors such as unc... View full abstract»

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  • Analysis and design of a novel three-phase active power filter

    Publication Year: 2001, Page(s):824 - 831
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB) | HTML iconHTML

    A novel three-phase active power filter is analyzed and designed. A low cost power circuit configuration of the active power filter is proposed, along with a fast peak detector for synthetic sinusoidal generation technique, in order to achieve almost real time compensating current calculation. This technique avoids the use of mains voltage signal in the calculation of reference compensation curren... View full abstract»

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  • Joint target tracking and classification using radar and ESM sensors

    Publication Year: 2001, Page(s):1039 - 1055
    Cited by:  Papers (59)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1488 KB) | HTML iconHTML

    Bayesian target classification methods using radar and electronic support measure (ESM) data are considered. A joint treatment of target tracking and target classification problems is introduced. First, a method for target classification using radar data and class-dependent kinematic models is presented. Second, a target classification method using ESM data is presented. Then, a Bayesian radar and... View full abstract»

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  • Detection of stochastic signals in the frequency domain

    Publication Year: 2001, Page(s):978 - 988
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB) | HTML iconHTML

    The optimum detector for a random signal, the estimator-correlator, is difficult to implement. If the power spectral density (PSD) of a continuous time signal is known, a locally optimum detector is available. It maximizes the deflection ratio (DR), a measure of the detector output signal-to-noise ratio (SNR). A discrete version of this detector is developed here, called the discrete-MDRD, which t... View full abstract»

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  • Control design and closed-loop analysis of a switched-capacitor DC-to-DC converter

    Publication Year: 2001, Page(s):1099 - 1107
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB) | HTML iconHTML

    The theoretical and practical details involved in the control design and closed-loop analysis of a step-down switched-capacitor (SC) DC-to-DC converter are presented. The state-space averaging technique is applied to extract the small-signal dynamics of the power stage, and a graphical loop gain method is used to design the feedback compensation and analyze the closed-loop performance of an SC con... View full abstract»

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  • Characteristics of the TE210 mode in circular apertures as used for satellite tracking

    Publication Year: 2001, Page(s):1113 - 1117
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    Monopulse tracking antennas are customarily used for tracking satellites subsequent to launch, in transfer orbit, and on station. A convenient means of obtaining a monopulse pattern is to couple to the null-on-axis TE210 mode of the tracking antenna's aperture in addition to the aperture's dominant mode. An expression is derived here for the polar-angular distance from the bo... View full abstract»

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  • Superimposed HMM transient detection via target tracking ideas

    Publication Year: 2001, Page(s):946 - 956
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB) | HTML iconHTML

    The quickest detection of superimposed hidden Markov model (HMM) transient signals is addressed. It is assumed that a known HMM is always extant but at an unknown time a second known HMM may also be present, and overlapped with the previous. Two approaches are proposed. The first treats the superimposed HMMs as a unit with an expanded state space, thus converting the problem of detecting superimpo... View full abstract»

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  • Implementation of a novel matrix converter PMSM drive

    Publication Year: 2001, Page(s):863 - 875
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB) | HTML iconHTML

    This paper proposes a neural-network current-regulated switching strategy and an intelligent controller for a matrix converter permanent magnet synchronous motor (PMSM) drive system. By using this new switching strategy, the current harmonics of the system are effectively reduced. In addition, by using the intelligent controller, position control of the drive system can be achieved and an adjustab... View full abstract»

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  • Euler angle dilution of precision in GPS attitude determination

    Publication Year: 2001, Page(s):1077 - 1083
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB) | HTML iconHTML

    The geometric dilution of precision (GDOP) is a useful parameter that indicates the effectiveness of the GPS satellite geometry on the positional navigation performance. In this work, the concept of the dilution of precision is extended to the attitude navigation solution. A new set of parameters, referred to as the Euler angle dilution of precision (EADOP), is defined. The validity and the useful... View full abstract»

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  • Relative targeting architectures for captive-carry HIL missile simulator experiments

    Publication Year: 2001, Page(s):810 - 823
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB) | HTML iconHTML

    Captive-carry electronic warfare (EW) tests evaluate the response of hardware-in-the-loop (HIL) missile seekers to an actual environment (test-range) including the presence of electronic attack. This paper describes a relative targeting architecture that displays the test-range results in geodetic coordinates using only the sensors available on board the captive-carry platform (GPS, INS, seekers).... View full abstract»

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  • Moving target detection via airborne HRR phased array radar

    Publication Year: 2001, Page(s):914 - 924
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB) | HTML iconHTML

    We study moving target detection in the presence of temporally and spatially correlated ground clutter for airborne high range resolution (HRR) phased array radar. We divide the HRR range profiles into large range segments to avoid the range migration problems that occur in the HRR radar data. Since each range segment contains a sequence of HRR range bins, no information is lost due to the divisio... View full abstract»

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  • Analysis of queuing behavior of automatic ESM systems

    Publication Year: 2001, Page(s):1010 - 1021
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB) | HTML iconHTML

    Radar electronic support measures (ESM) systems detect active emitters in a given area and determine their identities and bearings. The high arrival rate of radar pulses in dense emitter environments demands fast automatic processing of arriving pulses so that the ESM system can fulfill its functions properly in real time. Yet, the performance analysis of automatic ESM system in real life Is diffi... View full abstract»

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  • Tracking filters and models for seeker applications

    Publication Year: 2001, Page(s):965 - 977
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1000 KB) | HTML iconHTML

    Two-state tracking filters are considered for seeker applications. Estimation of the line-of-sight (LOS) rate is the main purpose and equations of motion for the LOS are discussed and simplified for design. An observer approach is applied, the filter transfer functions are given and the gain is designed by pole placement. Also a measurement time delay is taken into account. The filter properties a... View full abstract»

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  • Time-frequency approaches to ISAR imaging of maneuvering targets and their limitations

    Publication Year: 2001, Page(s):1091 - 1099
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB) | HTML iconHTML

    Inverse synthetic aperture radar (ISAR) imaging of the noncooperative maneuvering target is a challenging task because of its time variant orientation and rotation velocity which cannot be measured accurately. This correspondence investigates the principles of ISAR imaging of maneuvering targets, and proposes an algorithm for application in situations where the maneuverability is not too severe an... View full abstract»

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  • Nonparametric methods for clutter removal

    Publication Year: 2001, Page(s):832 - 848
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB) | HTML iconHTML

    Methods of clutter rejection are discussed which furnish an inherent counterpart of target tracking and detection algorithms. We describe how nonparametric curve estimation methods reduce the original sensor data to a “signal-plus-noise” model which is well suited for various hypotheses testing and dynamical filtering algorithms. We also verify a “white noise” assumption fo... View full abstract»

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  • Weibull, log-Weibull and K-distributed ground clutter modeling analyzed by AIC

    Publication Year: 2001, Page(s):1108 - 1113
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB) | HTML iconHTML

    Ground clutter of cultivated land was measured using an L-band long-range air-route surveillance radar (ARSR) having a 3.0 μs pulsewidth and a 1.23° beamwidth at very low grazing angles between 0.21° and 0.32°. To determine the ground clutter amplitude, we introduce the Akaike Information Criterion (AIC), which is more rigorous fit of the distribution to the data than the least squa... View full abstract»

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Aims & Scope

IEEE Transactions on Aerospace and Electronic Systems focuses on the organization, design, development, integration, and operation of complex systems for space, air, ocean, or ground environment.  These systems include, but are not limited to, navigation, avionics, spacecraft, aerospace power, radar, sonar, telemetry, defense, transportation, automated testing, and command and control. 

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Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory