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IEEE Transactions on Aerospace and Electronic Systems

Issue 6 • Nov 1989

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Displaying Results 1 - 12 of 12
  • Extension of Euler's theorem to n-dimensional spaces

    Publication Year: 1989, Page(s):903 - 909
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Euler's theorem states that any sequence of finite rotations of a rigid body can be described as a single rotation of the body about a fixed axis in three-dimensional Euclidean space. The usual statement of the theorem in the literature cannot be extended to Euclidean spaces of other dimensions. Equivalent formulations of the theorem are given and proved in a way which does not limit them to the t... View full abstract»

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  • Performance evaluation of a cascaded logic for track formation in clutter

    Publication Year: 1989, Page(s):873 - 878
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The authors present a Markov-chain-based performance evaluation technique for two-stage sliding-window cascaded logic (2/2×m /n) for track formation in a cluttered environment. The main features of this technique are that it avoids the need for extensive simulations and it is more realistic than previous methods, accounting for the association gate size variation. The gates... View full abstract»

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  • An approximate improvement factor expression in terms of interference spectrum

    Publication Year: 1989, Page(s):898 - 902
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    The authors derive a closed-form approximate improvement factor expression for the optimal transversal filter (Brennan-Reed weighting), which is directly in terms of the interference spectrum for convenience of performance analysis. Examples are given showing the accuracy of the approximation View full abstract»

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  • Second time around radar return suppression using PRI modulation

    Publication Year: 1989, Page(s):854 - 862
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A technique for suppressing second-time-around radar returns using pulse-repetition interval (PRI) modulation is presented and analyzed. It is shown that a staggered PRI radar system can offer considerable improvement over a nonstaggered radar system in rejecting second-time-around returns which cause false alarms. This improvement is a function of detector implementation (noncoherent integrator o... View full abstract»

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  • Survivable communication concept via multiple low Earth-orbiting satellites

    Publication Year: 1989, Page(s):879 - 889
    Cited by:  Papers (18)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    An overview of a reliable cross-link communication system using multiple low-Earth-orbit satellites is presented, covering the overall network concept, data packet routing, communication techniques including antenna subsystems, communication parameter tradeoffs, signal processing, and the overall radio design concept definition. The critical issue addressed is the maximum cross-link distance cover... View full abstract»

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  • Use of measurements from an imaging sensor for precision target tracking

    Publication Year: 1989, Page(s):863 - 872
    Cited by:  Papers (30)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    The extraction of measurements for precision tracking of the centroid of a target from a forward-looking infrared imaging sensor is presented. The size of the image of the target is assumed to be small, i.e. around 10 pixels. The statistical characterization of the centroid of the target is obtained. Similarly, the statistical properties of the image correlation of two frames, which measures the t... View full abstract»

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  • Mismatched-filter design for periodic binary phased signals

    Publication Year: 1989, Page(s):890 - 897
    Cited by:  Papers (36)  |  Patents (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A mismatched filter design is introduced whereby the receiver filter coefficients are optimized with the property that all sidelobes of the cross-correlation function (CCF) are zero. Some results are given for binary sequences and the associated mismatched filters. For each length N>2 there exist at least one sequence and an associated mismatched filter with an ideal impulselike CCF, w... View full abstract»

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  • Avionics for manned spacecraft

    Publication Year: 1989, Page(s):786 - 827
    Cited by:  Papers (6)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3672 KB)

    The author describes the avionic equipment for manned spacecraft, past, present, and future. He treats the four classic avionic systems-crew interface, flight control, navigation, and communication-and adds a fifth called subsystem management which refers to the monitoring and reconfiguration of equipment when faults occur. He starts by describing the functions of spacecraft avionics in general. H... View full abstract»

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  • Analytical steady-state solution for a three-state Kalman filter

    Publication Year: 1989, Page(s):828 - 835
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A closed-form steady-state solution is presented for the discrete Kalman-Buch filter when only position is measured. The procedure is based on a comparison between the Wiener and Kalman approaches. The solution obtained is more straightforward than the one given by S.N. Gupta (see ibid., vol.AES-20, p.839-49, Nov. 1984), which is difficult to handle when the eigenvalues are complex. The results ag... View full abstract»

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  • Target tracking in maneuver-centered coordinates

    Publication Year: 1989, Page(s):836 - 843
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Aircraft targets normally maneuver on circular paths, which has led to tracking filters based on circular turns. A coordinate system to track circular maneuvers with a simple Kalman filter is introduced. This system is a polar coordinate system located at the center of the maneuver. It leads to a tracking filter with range, angle, and angular velocity in the state vector. Simulation results are pr... View full abstract»

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  • Parallel resonant converter with LLC-type commutation

    Publication Year: 1989, Page(s):844 - 847
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    It is shown that by using a proper transformation of state variables, the third-order system of the parallel resonant converter (PRC) with LLC-type commutation can be analyzed by means of a two-dimensional state-plane diagram. A set of characteristic curves which can be used for the converter design is derived from the analysis. It is shown from these curves that the converter possesses m... View full abstract»

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  • Ambiguity function of quadriphase coded radar pulse

    Publication Year: 1989, Page(s):848 - 853
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Taylor's quadriphase coding (J.W. Taylor, Jr. and H.J. Blinchikoff, ibid., vol.23, no.2, p.156-70, Mar. 1988) is investigated for nonzero Doppler shifts. While the zero-Doppler cut of the ambiguity function (i.e. the autocorrelation) strongly resembles that of the corresponding biphase code, the remaining ambiguity function differs considerably. The ambiguity function of quadriphase code 13 is typ... 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