IEEE Transactions on Aerospace and Electronic Systems

Issue 6 • Nov. 1979

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Displaying Results 1 - 25 of 31
  • Table of contents

    Publication Year: 1979, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1979, Page(s):c2 - [926]a
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  • From the Editors

    Publication Year: 1979, Page(s): 753
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  • Multipath Fluctuation Effects in Track-While-Scan Radar

    Publication Year: 1979, Page(s):754 - 764
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2148 KB)

    A theoretical model of diffuse multipath reflections from rough surfaces is applied to the prediction of multipath power distribu tions in radar coordinates: elevation angle, time delay, and Dop pler frequency. These distributions are used to predict radar tracking errors in elevation angle, for both monopulse and scan ning antenna systems, and typical results are presented. These show a small inc... View full abstract»

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  • Multipath Tracking Errors in Elevation-Scanning and Monopulse Radars

    Publication Year: 1979, Page(s):765 - 776
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2361 KB)

    The tracking performance of elevation- scanning and monopulse radars in the presence of multipath propagation are compared. The key difference between these two generic types of radars is the way they respond to moving targets. There are no significant differences between their responses to pure specular multipath, nor to diffuse multipath for targets on radial courses. However, they are found to ... View full abstract»

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  • The Role of Scientific and Engineering Societies in Development: Present Perspectives and Future Prospects

    Publication Year: 1979, Page(s):777 - 786
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2739 KB)

    There can be no doubt that engineers and scientists have a vital role to play in the developmental processes by which the na tions of the Third World will bring greater health, safety, pro sperity and self-reliance to their peoples, but the role that the professionalengineering and scientific societies must play re mains undefined. In this paper the roles these societies perform for themselves and... View full abstract»

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  • America's Abundant Electricity and the ASME Boiler Code

    Publication Year: 1979, Page(s):787 - 793
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2401 KB)

    The building of great steam power plants with utmost consideration for public safety has created today's American miracle of abundant electricity. Behind this great achievement stand the mechanical engineers who have designed and built these power plants under their ethical responsibilities for public safety, in full compliance with the American Society of Mechanical Engineers (ASME) Boiler Code a... View full abstract»

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  • Comments on "America's Abundant Electricity and the ASME Boiler Code"

    Publication Year: 1979, Page(s): 794
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  • Detection Performance of Hard-Limited Phase-Coded Signals

    Publication Year: 1979, Page(s):795 - 802
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1693 KB)

    The performance of a complex phase-coded waveform digital processor with hard-limiting constant false-alarm rate (CFAR) is presented. Processing losses relative to ideal matched-filter performance are computed and verified by hardware measurement. The losses considered include the consequences of hard limiting, envelope algorithm implementation, range cusping, and the associated effects of code le... View full abstract»

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  • The Power-Inversion Adaptive Array: Concept and Performance

    Publication Year: 1979, Page(s):803 - 814
    Cited by:  Papers (108)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2309 KB)

    The use of a power-inversion adaptive array to improve the signal-to-interference ratio in a communication system is described. "Power inversion" refers to the ability of an adaptive array to invert the power ratio of two received signals. The power-inversion ion technique is useful because it does not require detailed ledgeknow about desired-signal structure or arrival angle. The perform ance att... View full abstract»

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  • Statistical Technique for Radar Amplitude Calibration

    Publication Year: 1979, Page(s):815 - 823
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2030 KB)

    A statistical technique for amplitude calibration of radar systems is presented. As distinct from the input-output crosscorrelation measurement of a linear system impulse response [1], this technique measures the amplitude transfer function of a memoryless, nonlinear system. A generalized theory is developed and calibration accuracy bounds are derived. Used in the calibration of a modern pulsed ra... View full abstract»

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  • On Weibull-Distributed Weather Clutter

    Publication Year: 1979, Page(s):824 - 830
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2393 KB)

    Weather clutter was observed using an L band range (200nmi) air-route surveillance radar (ARSR). It is shown that the measured clutter amplitudes obey a Weibull distribution. View full abstract»

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  • Detection Performance of Logarithmic Receivers Employing Video Integrators

    Publication Year: 1979, Page(s):831 - 839
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1387 KB)

    The detection performance of logarithmic receivers in Rayleigh and non-Gaussian clutter is investigated. In Rayleigh clutter the performance is determined for steady, Swerling case 1, and Swerling case 2 targets. The detection loss of logarithmic receivers is generally less than the ½ log n loss conjectured by Green, but consistent with the 1.08-dB asymptotic loss established by Hansen. Th... View full abstract»

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  • Controlling Adaptive Antenna Arrays with the Sample Matrix Inversion Algorithm

    Publication Year: 1979, Page(s):840 - 848
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2565 KB)

    Considerations are given leading to the selection of the samplematrix inversion algorithm for the control of an airborne narrowbandand adaptive receiving array for use in omnidirecti com communications. Performance is measured for a laboratory nulling system which implements this design concept. This performance ance is compared with predictions based on the component tolerances of the laboratory ... View full abstract»

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  • Optimum Filters for Image Registration

    Publication Year: 1979, Page(s):849 - 860
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2371 KB)

    Two-dimensional cross-correlation techniques are applied to the problem of image registration under the assumption of small geometric distortion. Optimum filter functions for use with arbitrary window functions are derived for two performance measures of interest: peak-to-sidelobe ratio, and mean- square registration error; the latter is examined in terms of the contribution due to distortion and ... View full abstract»

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  • An Analysis and Comparison of Energy Direction Finding Systems

    Publication Year: 1979, Page(s):861 - 873
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2194 KB)

    Direction finding systems that use knowledge of only the aporoximate center frequency and bandwidth of the arriving signal and perform the azimuth estimate using the signal energy azimuthal distribution are of widespread interest. In this paper, a variety of such systems are considered. Their performances are analyzed and compared to each other and to a baseline optimal system. Particular attentio... View full abstract»

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  • Spatial Gauss-Markov Models of Ocean Currents

    Publication Year: 1979, Page(s):874 - 881
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1829 KB)

    Ocean currents are an important error source in marine inertial navigation systems (INS). Satellite radar altimeter data are used to construct self- consistent Gauss- Markov models of ocean currents. These models are useful for INS error analysis and optimal (Kalman) filtering of INS outputs. View full abstract»

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  • Information for authors

    Publication Year: 1979, Page(s): 882
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  • Bounds on Elevation Error Estimates of a Target in Multipath

    Publication Year: 1979, Page(s):883 - 887
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (616 KB)

    The Cramer-Rao bound for an unbiased estimate of the elevation angle of a target in the presence of multipath is calculated for the symmetric (target and image symmetric about the elevation symmetry plane of antenna) and nonsymmetric cases for an antenna consisting of 21 elements. These bounds are compared to the maximum likelihood estimates and it is found that the rms error of the maximum likeli... View full abstract»

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  • Steady-State Covariance Matrix Determination for a Three-Dimensional Kalman Tracking Filter

    Publication Year: 1979, Page(s):887 - 889
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (325 KB)

    The steady-state components of the covariance matrix of estimation errors after processing an observation have been analytically determined ined for a tree-dimensional Kalman tracking filter. View full abstract»

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  • Compensating a Recursive MTI Filter for Missing Pulses

    Publication Year: 1979, Page(s):889 - 891
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (438 KB)

    Four methods of compensating a recursive, double-delay movingtarget indictor (MTI) cltter-cancellation filter for missing pulses were simulated and compared. One technique involving feedback from the delay outputs gave an average frequency response closely approximating that of the unperturbed filter. View full abstract»

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  • Aperture Sampling Techniques for Precision Direction Finding

    Publication Year: 1979, Page(s):891 - 895
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (860 KB)

    The resolution and tracking of radar targets which are close to. gether is a classical problem which is receiving increased attention. Improving the angular resolution by sampling the received wave front along the aperture and then applying modern "high resolution" spectrum estimation techniques (e. g., maximum likelihood and maximum entropy processing) to the spatial sample data is discussed. Exp... View full abstract»

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  • Angular Spectra in Radar Applications

    Publication Year: 1979, Page(s):895 - 899
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (984 KB)

    Recent advances in the art of estimating spectral densities have led to speculation that these same techniques could be used to improve angular resolution in radar applications. An improvement in angular resulution would be particularly helpful in sepingrating low angle returns from their surface reflected images. Despite the duality between time and space, however, it turns out that the low angle... View full abstract»

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  • Comments on "Angular Spectra in Radar Applications"

    Publication Year: 1979, Page(s):899 - 904
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1678 KB)

    In [1], we proposed using "data adaptive" spectrum estimation techniques (e.g., maximum likelihood and maximum entropy) for radar problems such as separating low angle returns from ground reflections. W. White suggests [2] that these techniques will be of little value due to the correlation between the various received signals. In this rebuttal, we present additional conceptual arguments, simulati... View full abstract»

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  • Transient Frequency-Error Statistics in Acquisition of Noiseless First-Order Phase Lock Loop

    Publication Year: 1979, Page(s):904 - 908
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (738 KB)

    After a certain time interval from the appearance of a reference signal in a synchronizing system employing a first-order phase lock loop (PLL), the probability that the output frequency error will be higher than a maximum tolerated value is determined. The system is assumed to be noise free. 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
Michael Rice
Brigham Young University