IEEE Transactions on Aerospace and Electronic Systems

Volume 29 Issue 1 • Jan 1993

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Displaying Results 1 - 25 of 30
  • Analysis of series-parallel resonant converter

    Publication Year: 1993, Page(s):88 - 99
    Cited by:  Papers (60)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    A frequency-domain steady-state analysis is given for a series-parallel resonant converter (SPRC) operating in the continuous conduction mode (CCM) using Fourier series techniques. Equations for performance parameters are derived under steady-state conditions to provide simple design tools. The topology of the SPRC combines the advantageous properties of both the series resonant converter (SRC) an... View full abstract»

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  • JEM modeling and measurement for radar target identification

    Publication Year: 1993, Page(s):73 - 87
    Cited by:  Papers (81)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1252 KB)

    The jet engine modulation (JEM) phenomenon, observed in radar returns from the rotating structure of jet engines, has been successfully exploited for aircraft target identification in a number of experimental radar systems. The authors develop a parametric model based on the periodic modulation of the scattered return, motivated by the potential reduction in time-on-target for reliable target iden... View full abstract»

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  • Azimuth/elevation direction finding using regular array geometries

    Publication Year: 1993, Page(s):145 - 156
    Cited by:  Papers (121)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (916 KB)

    The authors consider the problem of extending the estimation of signal parameters via rotational invariance techniques (ESPRIT) algorithm for multiple source, cochannel direction finding to the two-dimensional case (e.g., azimuth and elevation angle estimation). Two algorithms are presented, one based on the optimal (minimal variance) subspace fitting formulation of ESPRIT, and the other based on ... View full abstract»

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  • Coarse attitude determination from Earth albedo measurements

    Publication Year: 1993, Page(s):22 - 26
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Attitude estimation algorithms for the Thrusted Vector Mission which determine attitude based on Sun sensor and very coarse albedo sensor measurements are presented. On the basis of these measurements, it has been demonstrated by comparison with more accurate gyro-based attitude that it is possible to estimate three-axis attitude with an average error per axis of 11 deg. Most of this error is abou... View full abstract»

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  • Two CFAR algorithms for interfering targets and nonhomogeneous clutter

    Publication Year: 1993, Page(s):57 - 72
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    The greatest-of-order statistics estimator (GOOSE) constant false alarm rate (CFAR) and the censored greatest-of (CGO) CFAR are described. Both are designed to accommodate interfering targets in the reference window as well as control false alarms in the presence of clutter boundaries. Both succeed in accomplishing these tasks although the CGO-CFAR is preferred as it has a designed graceful degrad... View full abstract»

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  • Improving slant-range resolution with multiple SAR surveys

    Publication Year: 1993, Page(s):135 - 143
    Cited by:  Papers (57)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    Across-track resolution of a spaceborne synthetic aperture radar (SAR) system is limited by power and data rate constraints. The authors derive and discuss a new technique for increasing the across-track resolution of objects that do not change with time, using multiple surveys of the same area from different off-nadir angles. Precise information on the spaceborne trajectories are not requested si... View full abstract»

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  • Forward error correction for radiobeacon broadcast of differential GPS data

    Publication Year: 1993, Page(s):223 - 233
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    Marine radiobeacon networks are being used to broadcast differential Global Positioning System (DGPS) corrections to marine users. The correction data digitally modulate signals from some of the existing marine radiobeacons, which operate in the 285 to 325 kHz band, creating DGPS/radiobeacons. The corrections improve the accuracy of the GPS fix from 100 m to 5-10 m, and provide position fixing ser... View full abstract»

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  • A neural network approach to pulse radar detection

    Publication Year: 1993, Page(s):9 - 21
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A multilayer feedforward neural network is applied to pulse compression. The 13-element Barker code and the maximum-length sequences (m-sequences) with lengths 15, 31, and 63 b were used as the signal codes, and four networks were implemented, respectively. In each of these networks, the number of input units was the same as the signal length while the number of hidden units was three and... View full abstract»

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  • Efficient target tracking using dynamic programming

    Publication Year: 1993, Page(s):44 - 56
    Cited by:  Papers (111)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1012 KB)

    A dynamic programming (DP) algorithm has been developed for the detection and tracking of subpixel-sized, low signal-to-noise ratio (SNR) targets observed by side-or forward-looking imaging sensors. A distinguishing feature of this approach is that target detection and tracking are combined into a single optimization procedure that takes into account statistical models of target motion, background... View full abstract»

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  • Fusion of sensors with dissimilar measurement/tracking accuracies

    Publication Year: 1993, Page(s):245 - 250
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The case of data fusion of sensors dissimilar in their measurement/tracking errors is considered. It is shown that the fused track performance is similar whether the sensor data are fused at the track level or at the measurement level. The case of a cluster of targets, resolved by one sensor but not the other, is also considered. Under certain conditions the fused track may perform worse than the ... View full abstract»

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  • A new zero-voltage switching DC/DC boost converter

    Publication Year: 1993, Page(s):125 - 134
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A pulsewidth-modulated (PWM) zero-voltage-switching quasi-resonant boost converter operating at constant switching frequency is presented. In contrast to the frequency-modulated (FM) zero-voltage-switching quasi-resonant boost converter, this converter possesses better controllability and higher operating performance, and overcomes the instability caused by the parasitic oscillation. The principle... View full abstract»

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  • A comprehensive analysis of `Neural solution to the multitarget tracking data association problem' by D. Sengupta and R.A. Iltis [1989]

    Publication Year: 1993, Page(s):260 - 263
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    A comprehensive analysis reveals several drawbacks of the neural network probabilistic data association (NPDA) algorithm, which is an application of the Hopfield neural network to the data association problem for multitarget tracking in clutter View full abstract»

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  • A three-state Kalman tracker using position and rate measurements

    Publication Year: 1993, Page(s):215 - 222
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A three-state Kalman tracker is described for tracking a moving target, such as an aircraft, making use of the position and rate measurements obtained by a track-white-scan radar sensor which employs pulsed Doppler processing, such as the moving target detector providing unambiguous Doppler data. The steady-state filter parameters have been analytically obtained under the assumption of white noise... View full abstract»

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  • On phased-array radar tracking and parameter control

    Publication Year: 1993, Page(s):186 - 194
    Cited by:  Papers (81)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    Based on a simple model of a ground-based phased-array radar used for a multiple-target surveillance task, beam scheduling, positioning, and radar parameters like signal-to-noise ratio, track sharpness, and detection threshold have been optimized with respect to the radar/computer load induced by tracking. From this the minimum energy necessary for track maintenance during surveillance can be deri... View full abstract»

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  • The kinematic equation for the rotation vector

    Publication Year: 1993, Page(s):263 - 267
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    Different derivations of the kinematic equation for the rotation vector are discussed within a common framework. Simpler and more direct derivations of this kinematic equation are presented than are found in the literature. The kinematic equation is presented in terms of both the body-referenced angular velocity and the inertially referenced angular velocity. The kinematic equation is shown to hav... View full abstract»

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  • Modeling of brushless DC generating systems using diakoptics

    Publication Year: 1993, Page(s):100 - 110
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    The mathematical modeling of a brushless DC generator is described, as an illustration of the application of diakoptic techniques to the analysis of small-scale electrical power supply systems. Modeling of the generator and its output rectifier is accomplished using an established matrix technique that accounts for the continuously changing conduction pattern of the diode bridge network. The advan... View full abstract»

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  • Design and implementation of an AC active load simulator circuit

    Publication Year: 1993, Page(s):157 - 165
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    An AC active load simulator circuit which can simulate a desired load impedance with a power factor from zero to unity (leading or lagging) for the tested AC source is realized and tested. An interface circuit is designed to compute the simulated current waveform for the load-driver circuit according to the specified program of the system control unit and the measured source frequency and voltage ... View full abstract»

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  • Distributed binary integration

    Publication Year: 1993, Page(s):2 - 8
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A distributed radar detection system that employs binary integration at each local detector is studied. Local decisions are transmitted to the fusion center where they are combined to yield a global decision. The optimum values of the two thresholds at each local processor are determined so as to maximize the detection probability under a given probability of false alarm constraint. Using an impor... View full abstract»

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  • A new high performance multipurpose satellite tracking system

    Publication Year: 1993, Page(s):27 - 43
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB)

    The European Space Agency's (ESA) multipurpose satellite tracking system is introduced. The system is able to perform accurate satellite ranging and Doppler measurements for a variety of mission types, i.e., from near-Earth satellites to deep space probes. The ranging signal is analyzed and described in an analytical manner from which the limits of the system performance are derived. A model of th... View full abstract»

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  • Optimal polarimetric processing for enhanced target detection

    Publication Year: 1993, Page(s):234 - 244
    Cited by:  Papers (133)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    The results of a study of several polarimetric target detection algorithms are summarized. The algorithms were tested using real target-in-clutter data collected by the Lincoln Laboratory 35 GHz synthetic aperture radar (SAR) sensor. Fully polarimetric measurements (HH, HV, VV) are processed into intensity imagery using adaptive and nonadaptive polarimetric whitening filters (PWFs). Then a two-par... View full abstract»

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  • CW alternatives to the coherent pulse train-signals and processors

    Publication Year: 1993, Page(s):250 - 254
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Continuous wave (CW) signals phase modulated by a periodic waveform, and their corresponding receivers, are discussed. The combined response in delay and Doppler is almost identical to the (ideal) response of the coherent pulse train. The receivers are matched to an integral number N of modulation periods of the transmitted signal. CW implies a duty cycle of 100%. However, the signal dura... View full abstract»

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  • Multiple target angle tracking using sensor array outputs

    Publication Year: 1993, Page(s):268 - 271
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    The problem of tracking the directions of arrival of signals from a number of objects using sensor array outputs is considered. An algorithm is developed for estimating the angles associated directly with different objects, avoiding data association methods. Simulation results indicate that the proposed method works well in practice View full abstract»

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  • Imaging of point scatterers from step-frequency ISAR data

    Publication Year: 1993, Page(s):195 - 205
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    A high-resolution method for imaging of point scatterers from step-frequency inverse synthetic-aperture radar (ISAR) data is presented. An analysis of the noise sensitivity of the method is provided to show the high performance of the method. Simulation results are given to show the robustness of the method against model errors View full abstract»

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  • Non-Gaussian random vector identification using spherically invariant random processes

    Publication Year: 1993, Page(s):111 - 124
    Cited by:  Papers (170)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    With the modeling of non-Gaussian radar clutter in mind, elegant and tractable techniques are presented for characterizing the probability density function (PDF) of a correlated non-Gaussian radar vector. The need for a library of multivariable correlated non-Gaussian PDFs in order to characterize various clutter scenarios is discussed. Specifically,. the theory of spherically invariant random pro... View full abstract»

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  • Doppler imaging based on radar target precession

    Publication Year: 1993, Page(s):166 - 173
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A unique form of target motion reminiscent of the precession of a rotating top is investigated. Images are generated with the radar looking either along the precession axis or orthogonally to it. Features of the two methods are discussed and demonstrated by imaging simulated point target scenes 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
Michael Rice
Brigham Young University