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IEEE Transactions on Aerospace and Electronic Systems

Issue 1 • Jan. 2000

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Displaying Results 1 - 25 of 37
  • Comments on "Relationships between dilution of precision for point positioning and for relative positioning with GPS"

    Publication Year: 2000, Page(s):315 - 316
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (75 KB)

    While appreciating the works of R.O. Nielson (1997) and P.J.G. Teunissen (1998), we would like to give the exact relationship between dilution of precision for relative and absolute positioning. View full abstract»

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  • Errata: incorrect figure in "JointStars and GMTI: Past, present and future"

    Publication Year: 2000, Page(s): 349
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB)

    It has been brought to the attention of the authors that Fig. 9 in the above-named article [ibid., 35, 2 (Apr. 1999), 748??761] was incorrect. They had intended to show the Hughes Pave Mover Antenna System but inadvertently showed the Grumman Antenna System. The Hughes Antenna System is shown here. View full abstract»

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  • Call for papers

    Publication Year: 2000, Page(s): 349
    Cited by:  Papers (1)
    Request permission for commercial reuse | PDF file iconPDF (357 KB)
    Freely Available from IEEE
  • Parameter extraction for the extended cantilever model of magnetic component windings

    Publication Year: 2000, Page(s):260 - 266
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The extended cantilever model (ECM) for transformer or inductor windings is convenient from the parameter extraction standpoint since, theoretically, each model parameter can be extracted from a single measurement of an open-circuit voltage or a short-circuit current. The impedance of the sensor used to measure a short-circuit current, however, makes the “short” less ideal, and it has ... View full abstract»

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  • On GPS positioning and integrity monitoring

    Publication Year: 2000, Page(s):327 - 336
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    The paper reinvestigates the measurement model associated with Global Positioning System (GPS) signal processing. It is argued that the GPS positioning model is better formulated as a linear equation with errors in both the data matrix and measurement variables. Furthermore, depending on the nature of the measurement errors, the model is categorized into unstructured and structured perturbation ca... View full abstract»

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  • Neural network directed Bayes decision rule for moving target classification

    Publication Year: 2000, Page(s):176 - 188
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    In this paper, a new neural network directed Bayes decision rule is developed for target classification exploiting the dynamic behavior of the target. The system consists of a feature extractor, a neural network directed conditional probability generator and a novel sequential Bayes classifier. The velocity and curvature sequences extracted from each track are used as the primary features. Similar... View full abstract»

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  • Validation and comparison of coordinated turn aircraft maneuver models

    Publication Year: 2000, Page(s):250 - 259
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    A major challenge posed by aircraft tracking problems is the nondeterministic nature of an aircraft flight, due to the difficulty of predicting the pilot's actions. Accurate aircraft maneuver models are however highly desirable, particularly in air defense applications, to achieve accurate tracking and prediction. Through analysis of actual fighter aircraft trajectories and comparison with the Sin... View full abstract»

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  • Rotation method for direction finding via GPS carrier phases

    Publication Year: 2000, Page(s):72 - 84
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1076 KB)

    A baseline rotation method is proposed for determining the direction of the baseline vector via Global Positioning System (GPS) carrier phase measurements. The space difference technique is adopted to resolve GPS carrier phase cycle ambiguities. Possible applications include the determination of the aiming directions of artillery rockets and the line of sights of tracking radars, etc. For such arm... View full abstract»

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  • Background noise suppression for signal enhancement by novelty filtering

    Publication Year: 2000, Page(s):102 - 113
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    The enhancement of weak signals in the presence of background and channel noise is necessary to design a robust automatic signal detection and recognition system. The autoassociative property of neural networks can be used to map the identifying characteristics of input source waveforms or their spectra. This paper is directed at the exploitation of such neural network properties for novelty filte... View full abstract»

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  • Method for appraising radar image artifacts

    Publication Year: 2000, Page(s):320 - 327
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Expert systems are typically used to isolate radar image artifacts associated with dispersive and/or multiple target subscatterers. These subjective methods may overlook subtle image errors like intensity variations of (correctly positioned) image elements. A more objective approach-based on nonlinear Backus-Gilbert theory-shows how some of the traditional weaknesses might be avoided View full abstract»

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  • Broadband passive acoustic technique for target motion parameter estimation

    Publication Year: 2000, Page(s):163 - 175
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    A nonlinear least-squares method is formulated to estimate the motion parameters of a target whose broadband acoustic energy emissions are received by a ground-based array of sensors. This passive technique is applied to real acoustic sensor data recorded during the passage of a variety of ground vehicles past a planar cross array and its effectiveness verified by comparing the results with the ac... View full abstract»

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  • Synthesis of automatic gain controllers for conical scan tracking radar

    Publication Year: 2000, Page(s):302 - 309
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    The automatic gain control (AGC) of a conical scan tracking radar IF amplifier is designed using H∞ synthesis. It is shown that this technique is particularly suited for this problem because of its loop shaping capabilities and because it can tackle particular frequencies effectively, providing a correct balance among closed-loop stability, fast response to echo changes, and rejec... View full abstract»

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  • Interacting multiple model fixed-lag smoothing algorithm for Markovian switching systems

    Publication Year: 2000, Page(s):243 - 250
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    We investigate a suboptimal approach to the fixed-lag smoothing problem for Markovian switching systems. A fixed-lag smoothing algorithm is developed by applying the basic Interacting Multiple Model (IMM) approach to a state-augmented system. The computational load is roughly d (the fixed lag) times beyond that of filtering for the original system. In addition, an algorithm that approximates the &... View full abstract»

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  • Sensitivity analysis of dual-satellite geolocation

    Publication Year: 2000, Page(s):56 - 71
    Cited by:  Papers (26)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    An analytic solution is presented for the linearized estimation problem arising from the dual-satellite geolocation of the source of a narrowband signal using time- and frequency-difference-of-arrival (TDOA and FDOA, respectively) observations and an altitude constraint. This solution is used to analyze the covariance matrix of the resultant source location estimate, along with the sensitivity of ... View full abstract»

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  • Numerically robust implementation of multiple-model algorithms

    Publication Year: 2000, Page(s):266 - 278
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    Standard implementation of multiple-model (MM) estimation algorithms may suffer from numerical problems, especially numerical underflows, which occur when the true model is vastly different from one or more models used in the algorithm. This may be devastating to the performance of the MM algorithm. Numerical robust implementations of some of the most popular MM algorithms are presented. Simulatio... View full abstract»

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  • Proof of CFAR by the use of the invariant test

    Publication Year: 2000, Page(s):336 - 339
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    Many adaptive detectors regulate the detection threshold adaptively through an estimate of the clutter power level, which is formed by reference cell samples. This paper proves by the use of the invariant test that a large class of adaptive detectors possesses the constant false-alarm rate (CFAR) property when they satisfy certain weak conditions. The proof reveals the mechanism of this class of C... View full abstract»

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  • Single-phase power-factor-correction AC/DC converters with three PWM control schemes

    Publication Year: 2000, Page(s):189 - 200
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Three pulse-width modulation (PWM) control schemes for a single-phase power-factor-correction (PFC) AC/DC converter are presented to improve the power quality. A diode bridge with two power switches is employed as a PFC circuit to achieve a high power factor and low line current harmonic distortion. The control schemes are based on look-up tables with hysteresis current controller (HCC) to generat... View full abstract»

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  • Sensor registration using neural networks

    Publication Year: 2000, Page(s):85 - 101
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1492 KB)

    One of the major problems in multiple sensor surveillance systems is inadequate sensor registration. We propose a new approach to sensor registration based on layered neural networks. The nonparametric nature of this approach enables many different kinds of sensor biases to be solved. As part of the implementation we develop some modifications to the common network training algorithm to tackle the... View full abstract»

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  • Characterization of Kalman filter residuals in the presence of mismodeling

    Publication Year: 2000, Page(s):114 - 131
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1164 KB)

    The mean and covariance of a Kalman filter residual are computed for specific cases in which the Kalman filter model differs from a linear model that accurately represents the true system (the truth model). Multiple model adaptive estimation (MMAE) uses a bank of Kalman filters, each with a different internal model, and a hypothesis testing algorithm that uses the residuals from this bank of Kalma... View full abstract»

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  • Range and time-to-intercept estimation based solely upon the power measurements of a radiating source

    Publication Year: 2000, Page(s):316 - 320
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Range estimation based solely upon the received signal power measurements is possible for a specific set of conditions. Ordinarily the solution to this problem is not possible when the power of the signal at the source and the closing velocity are unknown. However, if the receiving platform modifies its velocity while sampling, the problem can be formulated with independent equations and solved. A... View full abstract»

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  • Nonlinear filter design using Fokker-Planck-Kolmogorov probability density evolutions

    Publication Year: 2000, Page(s):309 - 315
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    The Fokker-Planck-Kolmogorov equation (FPKE) in conjunction with Bayes conditional density update formula provides optimal estimates for a general continuous-discrete nonlinear filtering problem. It is well known that the analytical solution of FPKE and Bayes formula are extremely difficult to obtain except in a few special cases. Hence, we address this problem using numerical approaches. The effi... View full abstract»

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  • Ranging airport pseudolite for local area augmentation

    Publication Year: 2000, Page(s):278 - 286
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    This paper discusses the integration of an airport pseudolite (APL) into a local area augmented differential GPS based precision approach system. A prototype architecture is described that is being used to develop requirements for the local area augmentation system. Key features of this prototype system are presented along with its current performance. Key features discussed include the use of a m... View full abstract»

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  • RLS-based predictor for latency compensation in DGPS

    Publication Year: 2000, Page(s):339 - 343
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Differential Global Positioning System (DGPS) is a technique that is frequently used to correct for selective availability (SA) induced ranging errors. However, long sampling periods and the time delay (latency) between the generation of corrections and their application by the user are a fundamental performance limitation on DGPS. A recursive least squares (RLS) based predictor is suggested to pr... View full abstract»

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  • Selective buck-boost equalizer for series battery packs

    Publication Year: 2000, Page(s):201 - 211
    Cited by:  Papers (109)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    To maximize the capacity and reliability of a series connected battery pack, a new selective equalizer developed from the earlier ramp equalizer is proposed. A set of bipolar junction transistors (BJTs) controlled by a microcontroller is used to route equalization current to the lowest voltage batteries. Since only the lowest voltage batteries are connected to the equalizer, the need for uniform t... View full abstract»

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  • Stochastic-constraints method in nonstationary hot-clutter cancellation. II. Unsupervised training applications

    Publication Year: 2000, Page(s):132 - 150
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1520 KB)

    For pt. I see ibid., vol. 34, pp. 1271-1292 (1998). This paper considers the use of “stochastically constrained” spatial and spatio-temporal adaptive processing in multimode nonstationary interference (“hot clutter”) mitigation for scenarios that do not allow access to a group of range cells that are free from the backscattered sea/terrain signal (“cold clutter”... 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
Lance Kaplan
Army Research Laboratory