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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • July 1977

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Displaying Results 1 - 25 of 35
  • Table of contents

    Publication Year: 1977, Page(s): c1
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    Freely Available from IEEE
  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1977, Page(s):c2 - 464a
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  • Metric Time

    Publication Year: 1977, Page(s): 337
    Cited by:  Papers (1)
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  • Adaptive Detection Algorithms for Multiple-Target Situations

    Publication Year: 1977, Page(s):338 - 343
    Cited by:  Papers (123)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1369 KB)

    The performance of a mean-level detector is considered for the case where one or more interfering target returns are present in the set of cells used in estimating the clutter-plus-noise level. A serious degradation of detection probability is demonstrated for all of the single-pulse Swerling target fluctuation models (i. e., cases 0, 2, and 4). Indeed, for fixed mean radar cross sections of the p... View full abstract»

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  • Spectral Moment Estimates from Correlated Pulse Pairs

    Publication Year: 1977, Page(s):344 - 354
    Cited by:  Papers (111)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2121 KB)

    Estimates statistics of the first two power spectrum moments from the pulse pair covariance are analyzed. The input signal is assumed to be colored Gaussian and the noise, white Gaussian. Perturbation formulas for the standard deviation of both mean frequency and spectrum width are applied to a Gaussian shaped power spectrum, and so is a perturbation formula for the bias in the width estimate. Mea... View full abstract»

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  • Weight Jitter Phenomena in Adaptive Array Control Loops

    Publication Year: 1977, Page(s):355 - 361
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1827 KB)

    An analysis of weight jitter in adaptive array control loops is presented. lt is shown that steady state weight jitter and statistical dependence between input signal and weight processes are related factors. A Markov characterization for the first-order adaptive array loop is presented and Fokker-Planck techniques are used to obtain the steady state probability density of the weight process for t... View full abstract»

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  • Probability of Anomaly Expressions for Random Waveform Registration

    Publication Year: 1977, Page(s):362 - 369
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1595 KB)

    Registration by integral-square error correlation of one-dimensional discrete-time waveforms which are treated as random processes with specified autocorrelation functions is considered. An important design parameter for this class of problems is the probability of anomaly (a false dip in the correlation function) because it gives an indication of system immunity to gross registration errors. Expl... View full abstract»

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  • The Dynamic Stability of a Dual-Spin Satellite

    Publication Year: 1977, Page(s):370 - 377
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1400 KB)

    The attitude stability of a dual-spin satellite containing energy disipators on both bodies is investigated. Following Mingori, a symmetrical configuration of the satellite with a mass-spring-dashpot damper on each part is considered, and some new stability results are derived by the application of the Routh-Hurwitz criterion. lt is indicated that the Routh-Hurwitz criterion gives only sufficient ... View full abstract»

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  • Steady State Analysis of the Rectified Superconducting Alternator

    Publication Year: 1977, Page(s):378 - 387
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1593 KB)

    Equations are derived to predict the electrical behavior of a three-phase superconducting alternator connected to a full-wave bridge rectifier. This is accomplished by expanding a previous analysis for conventional rectified alternators and adding computational impovements. The significance of the work is that it provides a means of calculating certain critical variables such as the ac current in ... View full abstract»

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  • Comment on "Application of the Conjugate Gradient Method to a Problem on Minimum Time Orbit Transfer"

    Publication Year: 1977, Page(s):388 - 390
    Cited by:  Papers (1)
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  • Adaptive Radar Detection with Asymptotically Regulated False-Alarm Rate

    Publication Year: 1977, Page(s):390 - 394
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (946 KB)

    An adaptive detection procedure is described by which the detection threshold is so adjusted as to provide an asymptotic false-alarm probability PFA that is approximately invariant with changes in radar clutter return amplitude probability density functions (pdf's) in a broad class. The class includes Rayleigh, chi, Weibull, and lognormal pdf's. The receiver noise is also taken into account. The c... View full abstract»

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  • Microprocessor Matched Filtering of Emergency Chirp Signals

    Publication Year: 1977, Page(s):394 - 396
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (557 KB)

    A microcomputer matched filter solution is suggested for identifying emergency locator transmitter (ELT) signals from aircraft in distress. A sliding fast Fourier transform (FFT) with adjustable delay covers all permissible ELT sweep rates. The sweep rate for optimum response is retained for signal classification purposes. An additional nonsliding FFT is used to test for the possible presence of m... View full abstract»

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  • Authors' reply to Remarks by Lee

    Publication Year: 1977, Page(s): 396
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  • A General Model for Switching Converters

    Publication Year: 1977, Page(s):397 - 400
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (467 KB)

    A low frequency, small signal model, valid for all types of converters, both in the heavy and the light mode of conduction, is developed in block diagram form. The model provides a clear insight into the behavior of such converters and enhances the respective contributions of input and output filters. View full abstract»

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  • Coherent Square Wave Demodulation of Ideal Limiter Output

    Publication Year: 1977, Page(s):400 - 403
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (631 KB)

    An ideal limiter may be used to single-bit quantize a noisy sinusoidal signal. This digitization is particularly economical if the signal is to be recorded. lt might then be desired to obtain phase coherence with the limited input signal. A single-bit digital phase-locked loop. utilizing a square wave reference, could be used for this purpose. The effects of coherent square wave demodulation on th... View full abstract»

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  • Fourier Transform and Ambiguity Function of Piecewise Polynomial Functions

    Publication Year: 1977, Page(s):403 - 408
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (826 KB)

    A general systematic procedure is described for computing the Fourier transform and the ambiguity function of waveforms that are piecewise polynomial. The procedure can be implemented by hand or programmed for execution by a digital computer. The main advantage of the technique is that integration is replaced by a finite summation. Examples include the computation of characteristic function, momen... View full abstract»

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  • Modified Barker and Huffman Sequences in Combination Codes

    Publication Year: 1977, Page(s):408 - 413
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (930 KB)

    lt is possible that usable combination codes can be obtained if Barker and Huffman sequences are chosen as the inner and outer codes. lt is shown that an improvement in either energy efficiency or time sidelobe structure will result either from a modification of a Huffman sequence or from a modification of a Barker sequence. Results are given for a combination code of length 91, with inner and out... View full abstract»

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  • Authors' reply to "Comments on' a Note on Satellite Dynamics'"

    Publication Year: 1977, Page(s):413 - 414
    Cited by:  Papers (2)
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  • Compact AM Signals for Maximum Clutter Rejection

    Publication Year: 1977, Page(s):414 - 418
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (762 KB)

    The transmitted signal is assumed to consist of a close succession of rectangular pulses of equal width. A matched filter scheme is employed and a theory is developed for a computer-aided optimization of the envelope of monotone compact signals for maximum rejection of dense clutter of any given distribution in range. Specific results are presented and indeterminate cases are discussed. View full abstract»

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  • Steady State Results for the X, Y, Z Kalman Tracking Filter

    Publication Year: 1977, Page(s):419 - 423
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    An X, Y, Z Kalman tracking filter is described and its steady state characteristics are analytically determined when the radar sensor meaures range, bearing, and elevation (ϒ, θ, ϕ) at uniform intervals of time, T seconds. The relationship between the quantities measured by the sensor (ϒ,θ ,ϕ) and the Cartesian coordinate system (X, Y, Z) is explicit... View full abstract»

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  • Bomber Survivability and Penetration Capability

    Publication Year: 1977, Page(s):423 - 427
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    First Page of the Article
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  • Interference between FM Carriers and a Digitally Modulated SCPC Circuit

    Publication Year: 1977, Page(s):427 - 430
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (599 KB)

    The interference from the digital single channel per carrier (SCPC) circuits into frequency-modulated carrier systems has been calculated by convolving the desired and the interfering spectra extending the previously published works. Resulting interference noise power in FDM/FM systems covering a wide range of modulation indices and basebands has been presnted. Also plots of interference noise pow... View full abstract»

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  • Delay Generated Offset: A Direction Sensitive Pulse-Coherent Doppler Detection Technique

    Publication Year: 1977, Page(s):430 - 433
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (670 KB)

    An offset-frequency (heterodyne) direction sensitive coherentpulsed Doppler detection method requiring a single digitally synthesized phase-shiftable oscillator and a single mixer is described. Less stringent demands are imposed on hardware in obtaining offset-frequency stability and rejection of internally generated electrical clutter, as compared with the conventional offset method employing two... View full abstract»

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  • Polarization Loss of a Satellite: Data Collection Sensor Link

    Publication Year: 1977, Page(s):433 - 435
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (321 KB)

    Economy of data collection systems consisting of several widely dispersed sensor platforms monitored by satellite can be realized by using an inexpensive linearly polarized antenna on each platform. The polarization loss of such an antenna is calculated. View full abstract»

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  • Additions and Corrections to "Adaptive Thresholding Systems"

    Publication Year: 1977, Page(s): 435
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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