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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 (2)
    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
  • Loran-C cycle identification in hard-limiting receivers

    Publication Year: 2000, Page(s):290 - 297
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    A new technique is presented for use in hard-limiting receivers. It is based on the widely used analogue “half-cycle peak ratio” (HCPR) technique, from which it differs by being entirely digital; no additional analogue signal processing or other hardware is required. Drawing on recent advances, the new method makes decisions based on a large number of sample points in each Loran-C puls... View full abstract»

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  • Optimization of point target tracking filters

    Publication Year: 2000, Page(s):15 - 25
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    We review a powerful temporal-based algorithm, a triple temporal filter (TTF) with six input parameters, for detecting and tracking point targets in consecutive frame data acquired with staring infrared (IR) cameras. Using an extensive data set of locally acquired real-world data, we used an iterative optimization technique, the Simplex algorithm, to find an optimum set of input parameters for a g... View full abstract»

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  • Equivalent ARMA model representation for RLG random errors

    Publication Year: 2000, Page(s):286 - 290
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    It is shown that a mixture of random noises can be represented by a single equivalent ARMA (autoregressive moving average) model that is simple to implement. We applied the scheme to model RLG (ring laser gyroscope) random errors. An identification result from real test data confirms the validity of this approach View full abstract»

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  • Fixed-interval retrodiction approach to Bayesian IMM-MHT for maneuvering multiple targets

    Publication Year: 2000, Page(s):2 - 14
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    In a Bayesian framework, we propose a hierarchy of suboptimal retrodiction algorithms that generalize Rauch-Tung-Striebel (RTS) fixed-interval smoothing to multiple hypothesis tracking (MHT) applications employing interacting multiple model (IMM) methods (IMM-MHT). As a limiting case we obtain new simple formulae for suboptimal fixed-interval smoothing applied to Markovian switching systems. Retro... View full abstract»

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  • Ranging airport pseudolite for local area augmentation

    Publication Year: 2000, Page(s):278 - 286
    Cited by:  Papers (3)
    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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  • Communication system and operation for lunar probes under lunar surface

    Publication Year: 2000, Page(s):151 - 162
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1100 KB)

    In the Japanese LUNAR-A mission, penetrators will be deployed to the Moon for global seismic measurement. The unique communication system between the subsurface probes under the lunar surface and the lunar orbiter is described. Radiowave propagation through a crater which is formed at the penetration is investigated by means of scaled measurements in a simulating environment. Acquisition and track... 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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  • Sensitivity analysis of dual-satellite geolocation

    Publication Year: 2000, Page(s):56 - 71
    Cited by:  Papers (17)  |  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 (27)
    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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  • 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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  • 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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  • Interacting multiple model fixed-lag smoothing algorithm for Markovian switching systems

    Publication Year: 2000, Page(s):243 - 250
    Cited by:  Papers (22)
    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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  • 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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  • Highest density gates for target tracking

    Publication Year: 2000, Page(s):47 - 55
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    The problem of forming validation regions or gates for new sensor measurements obtained when tracking targets in clutter is considered. Target dynamics and measurement characteristics are modeled with, possible non-Gaussianities or nonlinearities, so that some degree of approximation is usually required in the computation of the filtering densities for the target position and predictive densities ... 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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  • Sensor registration using neural networks

    Publication Year: 2000, Page(s):85 - 101
    Cited by:  Papers (17)
    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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  • 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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  • Characterization of Kalman filter residuals in the presence of mismodeling

    Publication Year: 2000, Page(s):114 - 131
    Cited by:  Papers (14)
    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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  • On GPS positioning and integrity monitoring

    Publication Year: 2000, Page(s):327 - 336
    Cited by:  Papers (10)  |  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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  • Effective filtering of target glint

    Publication Year: 2000, Page(s):234 - 240
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    An effective filter structure is suggested for filtering of target glint in active homing engagements of a ship-to-ship missile. The proposed filter has decoupled range and angle channels so that it has a sound mathematical basis as well as computational efficiency as applied to the interacting multiple model algorithm. The proposed algorithm in conjunction with an impact angle control law is test... 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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  • Identification of a discrete-time dynamical system

    Publication Year: 2000, Page(s):212 - 225
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    A novel generalized minimum variance (GMV) system identification algorithm is developed, and its performance is gauged against the established generalized least squares (GLS) estimation algorithm. The emphasis of the proposed GMV algorithm is on the rigorous treatment of measurement noise for dynamical system identification. A careful analysis of the measurement situation on hand yields a novel fi... 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