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IEEE Transactions on Aerospace and Electronic Systems

Issue 6 • Date Nov. 1976

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Displaying Results 1 - 25 of 29
  • Table of contents

    Publication Year: 1976, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1976, Page(s):c2 - [848]a
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  • From the Editors

    Publication Year: 1976, Page(s): 673
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  • Cross Correlation of Orthogonally Polarized Backscatter Components

    Publication Year: 1976, Page(s):674 - 682
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1873 KB)

    The backscattering of an elliptically polarized plane wave from two kinds of complex radar objects is considered from the standpoint of coherency theory, and the antenna polarizations that give rise to maximum correlated and uncorrelated orthogonally polarized components in the receiving channels are discussed. The resulting observations may find application in radar systems which use the correlat... View full abstract»

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  • Coding for Ambiguity Reduction in Pulsed Scanning Systems

    Publication Year: 1976, Page(s):683 - 688
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (884 KB)

    A technique for suppressing the ambiguities arising in pulsed scanning systems is described. A system of multiple antennas is employed, and a coded sequence of pulses is radiated. View full abstract»

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  • Single-Winding Single-Phase Inductor Alternator

    Publication Year: 1976, Page(s):689 - 697
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2657 KB)

    The mathematical analysis of a single-phase inductor alternator presented here asserts that rotor slot restrictions apply only for alternators with conventional double winding. Schemes using single winding for both dc excitation and single-phase output are developed and their designs are discussed. It is demonstrated that the proposed schemes are superior in performance to conventional schemes. Te... View full abstract»

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  • Microprocessor-Controlled Communications in an Advanced Instrument Landing System

    Publication Year: 1976, Page(s):698 - 705
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4230 KB)

    The application of 4-bit microprocessors to the communication of the control and status signals found in an advanced aircraft instrument landing system is presented. The advantages as well as some of the peculiarities of such an approach are described. Among the benefits, one must include the possibility of a very convenient and understandable human interface. View full abstract»

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  • State Trajectories Used to Observe and Control DC-to-DC Converters

    Publication Year: 1976, Page(s):706 - 717
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3269 KB)

    State-plane analysis techniques are employed to study the voltage stepup energy-storage dc-to-dc converter. Within this framework, an example converter operating under the influence of a constant on-time and a constant frequency controller is examined. Qualitative insight gained through this approach is used to develop a conceptual free-running control law for the voltage stepup converter which ca... View full abstract»

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  • Postfiltering in Digital Beamformers

    Publication Year: 1976, Page(s):718 - 727
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2652 KB)

    Assuming a sinusoidal signal superimposed on a narrow-band Gaussian noise as the input to a receiving array, the output power and signal-to-noise ratio of a digital beamformer with postfiltering were formulated so that subsequent calculations could be made without an analysis in the frequency domain. The formulation utilized the quantizer functions previously given by the author and certain spectr... View full abstract»

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  • Dynamic Effects of Signal Normalizing on Adaptive Algorithms

    Publication Year: 1976, Page(s):728 - 735
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2500 KB)

    A method is shown for suppressing the adaptive switching transient that arises in complex adaptive (LMS and stochastic approximation) algorithms due to signal normalization with controlled switched gains. The method involves rescaling of the adaptive weights with the normalizing gains just prior to the first adaptation with the new gains. In addition, an effective method of rescaling the adaptive ... View full abstract»

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  • Radar Detection in Weibull Clutter

    Publication Year: 1976, Page(s):736 - 743
    Cited by:  Papers (77)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2135 KB)

    Radar detection in Weibull clutter is examined from a statistical detection viewpoint. Weibull clutter parameters are determined and related to measured values of land and sea clutter. Optimum performance in Weibull clutter is determined, and practical receivers that approach this performance are identified. Receiver performance in Rayleigh, log-normal, and Weibull clutter is evaluated and compare... View full abstract»

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  • Determination of Failure Thresholds in Hybrid Navigation

    Publication Year: 1976, Page(s):744 - 755
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2984 KB)

    A systematic approach for the determination of failure thresholds for hybrid navigation systems is described. Cost functions which reflect the importance assigned to the consequences of false and missed alarms are minimized. The false alarm probability is obtained as a function of the threshold magnitude by observing the statistical behavior of the instrument outputs in the normal operating mode. ... View full abstract»

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  • Range Instrumentation Radars

    Publication Year: 1976, Page(s):756 - 766
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7929 KB)

    The history of range instrumentation radars begins at the end of World War 11, with the SCR-584 radar. Since then, the use of instrumentation radars on ranges all over the globe has expanded greatly to gather metric performance data on aircraft, projectiles, missiles, and satellites. In this paper, key subsystem-level and system-level developments during the past decade are reviewed, including pul... View full abstract»

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  • Helicopter Motion: Equation Linearization

    Publication Year: 1976, Page(s):767 - 782
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1983 KB)

    The nonlinear set of equations which represent helicopter motion is linearized about a prescribed nominal state. Once the linearized system is obtained it is validated by comparing the output of the nonlinear system to that of its linearized counterpart. Having obtained a linear model, linear system theory may then be applied in order to investigate the stability and control characteristics of the... View full abstract»

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  • Development of Helicopter Flight Path Models

    Publication Year: 1976, Page(s):783 - 792
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2235 KB)

    First Page of the Article
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  • Mean-Level Detection Utilizing a Digital First-Order Recursive Filter

    Publication Year: 1976, Page(s):793 - 798
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (978 KB)

    The use of a simple digital first-order recursive filter for mean-level detection is described. Performance characteristics are derived for the case where the background noise is stationary, and detection results are given for Swerling Case 2 fluctuating signals. Equations are derived for computing false-alarm performance in nonstationary backgrounds, and results are given for some special cases. ... View full abstract»

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  • Comments on "Bounds on Probability of Error in Decision Feedback Equalizers"

    Publication Year: 1976, Page(s):798 - 800
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (505 KB)

    In the above paper1 a technique was proposed to derive an upper bound on the error probability of a decision feedback equalizer. It involves decomposition of the probability density function of residual intersymbol interference and derivation of Chebyshev-type bounds on the error functionals over the decomposed functions. In this correspondence, we demonstrate that the technique is not applicable ... View full abstract»

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  • Properties of Staggered PRF Radar Spectral Components

    Publication Year: 1976, Page(s):800 - 803
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1407 KB)

    Expressions for moving target indicator (MTI) improvement factor limitation due to pulse repetition frequency (PRF) staggering and loss of target detectability for various values of Doppler frequency in the passband are presented. It is also shown that the product of variance of stagger periods and clutter variance is an important parameter determining the performance of a staggered PRF MTI radar. View full abstract»

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  • Effects of Automatic Gain Control on Phase-Locked Loop Behavior in the Presence of Interference

    Publication Year: 1976, Page(s):803 - 805
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (562 KB)

    The behavior of a second-order phase-locked loop (PLL) in the presence of an interfering signal has been analyzed by different authors with different results. The discrepancy is attributed to the presence or absence of an automatic gain controlled amplifier preceeding the PLL. Simulation results verify that the presence of the automatic gain controlled amplifier reduces the tendency of the PLL to ... View full abstract»

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  • Ambiguity Removal When Using Burst Waveforms. Part II: Nonlinear Processing

    Publication Year: 1976, Page(s):805 - 811
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1076 KB)

    An effective technique for removing range ambiguities (detections at ranges other than the true range of the object) arising when using a burst waveform is to transmit two bursts with different pulse repetition frequencies nearly simultaneously and then to process their outputs nonlinearly. This correspondence introduces two nonlinear processors which combine coincidence detection with either nonc... View full abstract»

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  • Frequency Agility Radar Range Calculation Using Number of Independent Pulses

    Publication Year: 1976, Page(s):811 - 815
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (979 KB)

    A method for accurately calculating the radar range improvement introduced by frequency agility is presented. This calculation is made by using the concept of independent pulses. The number of independent target or clutter pulses is calculated by a simple method based on such basic combinatorial probability theory as drawing differently colored balls from an urn. View full abstract»

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  • Sliding Window Detection Probabilities

    Publication Year: 1976, Page(s):815 - 819
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1531 KB)

    A method is proposed for computing sliding window detection probabilities which have applications in track-while-scan acquisition logic and radar detection theory. The sliding window probability is the probability of achieving m successes out of n consecutive events at least once by the Nth opportunity. Expressions are derived for these probabilities as a function of N and p (the per-event success... View full abstract»

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  • A Note on Satellite Dynamics

    Publication Year: 1976, Page(s):819 - 822
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (429 KB)

    It is demonstrated here that inertial differentiation of angular momentum-is independent of the choice of the moving reference coordinate system. The results agree with Greensite [1] and contradict Sen's results [2] by indicating a basic error in his derivation. However, Sen's step [2] is correct. View full abstract»

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  • Corrections to "Optimal Array Processor Performance Trade-Offs under Directional Uncertainty"

    Publication Year: 1976, Page(s):822 - 823
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  • Correction to, "Performance Degradation of MTI Circuits Due to Amplitude Limiting"

    Publication Year: 1976, Page(s): 823
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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