IEEE Transactions on Aerospace and Electronic Systems

Volume 35 Issue 4 • Oct. 1999

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Displaying Results 1 - 25 of 37
  • Author index

    Publication Year: 1999, Page(s):1480 - 1485
    Cited by:  Papers (1)
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  • Subject index

    Publication Year: 1999, Page(s):1485 - 1503
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    Freely Available from IEEE
  • Alternate forms of the PWM switch models

    Publication Year: 1999, Page(s):1283 - 1292
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    Vorperian's pulsewidth modulation (PWM) switch model consists of a PWM transformer and a nonlinear resistor. The recognition that any of the three transformer terminals can serve as the common terminal leads to two alternate PWM transformer models and the corresponding two alternate PWM switch models. For a given PWM dc-dc converter, one of the three PWM switch models is more “natural”... View full abstract»

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  • Multiband coherent radar detection against compound-Gaussian clutter

    Publication Year: 1999, Page(s):1266 - 1282
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    A Multiband GLRT-LQ (Generalized Likelihood Ratio Test-Linear Quadratic), MBGLRT-LQ, detector is derived for the coherent radar target detection against a compound-Gaussian clutter background. This scheme is an extension to the multiband case of the Asymptotically Optimum Detector (AOD), also derived under the name of GLRT-LQ in. The proposed multiband version of the algorithm shows two main advan... View full abstract»

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  • Performance bounds for hot and cold clutter mitigation

    Publication Year: 1999, Page(s):1253 - 1265
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    A new method is presented for describing the theoretical interference space-time covariance matrix that will be observed in an adaptive airborne radar system under specific topographical conditions. Both hot clutter that is induced by interfering sources and cold clutter that results from the radar transmitter are considered. This method incorporates phenomenology observed under site specific cond... View full abstract»

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  • Dynamically adaptable m-best 2-D assignment algorithm and multilevel parallelization

    Publication Year: 1999, Page(s):1145 - 1160
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1052 KB)

    In recent years, there has been considerable interest within the tracking community in an approach to data association based on the m-best two-dimensional (2D) assignment algorithm. Much of the interest has been spurred by its ability to provide various efficient data association solutions, including joint probabilistic data association (JPDA) and multiple hypothesis tracking (MHT). The focus of t... View full abstract»

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  • Autofocusing of ISAR images based on entropy minimization

    Publication Year: 1999, Page(s):1240 - 1252
    Cited by:  Papers (259)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    A novel autofocusing technique is developed for random translational motion compensation in inverse synthetic aperture radar (ISAR) imaging of objects. This technique is based on an entropy minimization principle and validated via a nonparametric estimation method. Images of a simulation and a real flying aircraft are used for illustration. Images of encouraging quality confirm the feasibility of ... View full abstract»

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  • Mini-UAV altitude estimation using an inertially stabilized payload

    Publication Year: 1999, Page(s):1191 - 1203
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A novel method is introduced for autonomous attitude estimation of a mini unmanned aerial vehicle (UAV) carrying an inertially stabilized payload. The method is based on utilizing the outputs of rate gyros normally used to inertially stabilize the payload, and other data that is normally available from conventional aircraft-mounted sensors. A decentralized estimation algorithm is developed, which ... View full abstract»

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  • Adaptive nulling of SAR sidelobe discretes

    Publication Year: 1999, Page(s):1212 - 1218
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    By using adaptive subarrays for crossrange imaging we have developed a computationally simple method that removes any image degradation caused by strong, discrete clutter located in the crossrange sidelobes of a synthetic aperture radar (SAR) image. The procedure is based on the minimization of the mean interference power with the constraint that the image of a desired scatterer is undistorted. Th... View full abstract»

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  • Passive localization of frequency-agile radars from angle and frequency measurements

    Publication Year: 1999, Page(s):1129 - 1144
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (820 KB)

    It is well known that the position of a stationary radar can be estimated by a single moving observer from angle and/or frequency measurements taken passively at different points in its trajectory. Depending on the measurement set different localization methods result: the bearing method (BM), the frequency method (FM), and the combined method (CM). Previous studies analyze the three methods on th... View full abstract»

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  • Dynamic modeling and controller design of flyback converter

    Publication Year: 1999, Page(s):1230 - 1239
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The accurate dynamic modeling and quantitative controller design for an isolated converter with optocoupler isolation in its feedback loop are considered to be difficult issues, since the transfer characteristics of some blocks are highly nonlinear and difficult to be modeled analytically. First a current-mode controlled flyback converter with an optically isolated feedback path is designed. Then ... View full abstract»

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  • Predicting the visibility of LEO satellites

    Publication Year: 1999, Page(s):1183 - 1190
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    We present a simple algorithm to determine the visibility-time function of a circular low Earth orbit (LEO) satellite at a terminal on the Earth's surface. The simplicity of the algorithm is based on approximating the ground trace of the satellite (which is not a great circle due to Earth's rotation) during a time interval of the order of in-view period, by a great-circle are. This enables us to u... View full abstract»

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  • Estimation of the parameters of the K-distribution using higher order and fractional moments [radar clutter]

    Publication Year: 1999, Page(s):1453 - 1457
    Cited by:  Papers (63)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    We propose a method for estimating the parameters of the K-distribution in a manner which significantly reduces computational requirements when compared with existing approaches. Additionally, the method yields parameter estimates with lower variance when compared with standard techniques View full abstract»

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  • Generalized input-estimation technique for tracking maneuvering targets

    Publication Year: 1999, Page(s):1388 - 1402
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    A new input estimation technique for target tracking problem is proposed. Conventional input estimation techniques assume that the target maneuver level is constant within the detection window, which has been the major drawback of the techniques. The proposed technique is developed to overcome this drawback by modeling the target maneuver as a linear combination of some basic time functions. The r... View full abstract»

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  • Impact angle control for planar engagements

    Publication Year: 1999, Page(s):1439 - 1444
    Cited by:  Papers (109)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A new and practical terminal guidance law is presented for impact angle control for two-dimensional active homing engagement scenarios. Impact angle control is required to enhance terminal effectiveness of antitank and antiship missile systems in particular. The proposed guidance law is developed to cope with missile velocity reduction due to aerodynamic drag and target maneuver. In actual applica... View full abstract»

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  • Time delay estimation with multiple looks in colored Gaussian noise

    Publication Year: 1999, Page(s):1354 - 1361
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    We present an efficient algorithm for high resolution time delay estimation in colored Gaussian noise with multiple looks. By using a relaxation-based optimization approach and exploiting the Toeplitz property of the noise covariance matrix, the enhanced new algorithm can achieve the corresponding Cramer-Rao bounds (CRBs) with a very small number of independent looks View full abstract»

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  • Matched subspace CFAR detection of hovering helicopters

    Publication Year: 1999, Page(s):1293 - 1305
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    A constant false alarm rate (CFAR) strategy for detecting a Gaussian distributed random signal against correlated non-Gaussian clutter is developed. The proposed algorithm is based on Scharf's matched subspace detector (MSD) and has the CFAR property with respect to the clutter amplitude probability density function (apdf), provided that the clutter distribution belongs to the compound-Gaussian fa... View full abstract»

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  • State estimation using an approximate reduced statistics algorithm

    Publication Year: 1999, Page(s):1161 - 1172
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    The problem of state estimation using nonlinear additive Gaussian noise measurements is addressed. A geometric model for the posterior state density is assumed based on a multidimensional Haar basis representation. An approximate reduced statistics (ARS) algorithm, suggested by the parameter estimator of Kulhavy is then developed, using successive minimization of relative entropy between model den... View full abstract»

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  • Active phased array design for high reliability

    Publication Year: 1999, Page(s):1204 - 1211
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    We discuss strategies for designing: active phased array antennas with high reliability. We show how to consider fault-tolerance in the design of the antenna architecture, so that replacement of failed components can be avoided for an extended period of time. First, we address the dependence of antenna life cycle cost on component failure rates. Then we discuss the design of active phased array ar... View full abstract»

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  • Optimal parity vector sensitive to designated sensor fault

    Publication Year: 1999, Page(s):1122 - 1128
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Based on the parity space construction and the orthogonal constraint condition of parity vector, the approach of fault detection and isolation using optimal parity vector is presented. Its main idea is to design a performance criterion similar to the criterion presented by Zhang and Patton (1993), but most sensitive to the designated sensor's fault and least sensitive to other sensor's fault and u... View full abstract»

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  • Integer ambiguity resolution in GPS for spinning spacecrafts

    Publication Year: 1999, Page(s):1219 - 1229
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    A procedure to compute the integer ambiguity problem when a GPS receiver is used in a multiple antenna configuration attached to a rotating spacecraft is presented. The method is applied to a simulation of an experimental satellite which uses the GPS receiver for attitude determination View full abstract»

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  • On distributed signal detection with multiple local free parameters

    Publication Year: 1999, Page(s):1457 - 1466
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    In this work, we propose an efficient approach to the optimization of distributed multiradar systems with parallel topology, employing decision fusion from local detectors with discrete and continuous free design parameters. This approach, termed hierarchical optimization approach, can be applied to a variety of optimization criteria including the Neyman-Pearson (NP) and the locally optimum detect... View full abstract»

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  • Partial eigenstructure assignment algorithm in flight control system design

    Publication Year: 1999, Page(s):1403 - 1409
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A new algorithm is proposed for assigning some of the eigenvalues to the desired places while guaranteeing the stability of the closed-loop system. For partial eigenstructure assignment, the null space approach is utilized, and additional feedback is used to stabilize the remaining eigenvalues. The quadratic type performance index is chosen to determine the additional feedback gain lying on the co... View full abstract»

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  • Wideband quadrature error correction (using SVD) for stepped-frequency radar receivers

    Publication Year: 1999, Page(s):1444 - 1449
    Cited by:  Papers (11)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    We present a new technique which corrects the wideband quadrature errors associated with homodyne stepped frequency radar receivers. The correction algorithm is derived using singular value decomposition (SVD) which diagonalizes and scales the covariance matrix of a test signal while preserving the coherent phasor alignment across all frequency steps of the homodyne receiver. Using our technique, ... View full abstract»

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  • Overview of multiple satellite communication networks

    Publication Year: 1999, Page(s):1362 - 1368
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Recently interest in packet communications has stimulated an interest in constellations of low altitude satellites. Such a configuration would have less propagation delay and be cheaper to launch than satellites at higher or geosynchronous altitude. However, many more satellites are necessary at low altitude to achieve reasonable coverage of the earth and insure availability of the resource. Furth... 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. 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Michael Rice
Brigham Young University