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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Date July 1980

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Displaying Results 1 - 25 of 28
  • Table of contents

    Publication Year: 1980, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1980, Page(s):c2 - 543-a
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  • From the Editors

    Publication Year: 1980, Page(s): 417
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  • Computational Precision Requirements for Optimal Weights in Adaptive Processing

    Publication Year: 1980, Page(s):418 - 425
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1453 KB)

    The required accuracy for computing the estimated optimum weights of an adaptive processor has been analyzed by investigating the effects of errors in computing the inverse matrix. It is shown that the required precision depends upon the matrix. An equation for the general case is derived. Several special cases are considered in detail. It is shown that the case of a single interference source req... View full abstract»

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  • Crosstalk Resistant Receiver for M-ary Multiplexed Communications

    Publication Year: 1980, Page(s):426 - 433
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1310 KB)

    Attention is directed to the problem of M-ary signal transmission from a multiplicity of synchronized information sources. A receiver processor is derived which suppresses the effect of crosstalk between nonorthogonal signals. The processor is valid for a general zero mean, noise environment. A probability of error bound is derived for the processor. Several examples illustrate the processor. View full abstract»

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  • A Quantitative Study of Pitfalls in the FFT

    Publication Year: 1980, Page(s):434 - 439
    Cited by:  Papers (157)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1385 KB)

    The effects of aliasing (including pseudoaliasing), picket-fence effect, and leakage in the fast Fourier transform (FFT) are presented. A computer program was written to perform the FFT analysis of known inputs. The program has the capability of detecting aliasing by calculating an "aliasing coefficient" (Q), and will increase the sampling frequency and the number of points in the input sequence i... View full abstract»

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  • Spread-Spectrum Signaling for Distributed Fiber Optic Systems

    Publication Year: 1980, Page(s):440 - 445
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1294 KB)

    One of the stringent requirements on the receivers of distributed industrial fiber optic systems is fast and accurate adaptive thresholding and a wide dynamic range. This is due to the existence of variable link lengths and geometry, especially in multipleaccess situations, coupled with unipolar optical signaling. This paper analyzes the application of a simple spread-spectrum system in such fiber... View full abstract»

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  • Sample Size Considerations for Adaptive Arrays

    Publication Year: 1980, Page(s):446 - 451
    Cited by:  Papers (66)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1001 KB)

    Digital control of adaptive arrays has been shown to be a feasible alternative to analog feedback-loop control. As the eigenvalue spread of the correlation matrix no longer controls the speed of adaption, one merely has to ensure that enough samples have been taken so that the matrix estimate is close to the true matrix. While previous studies have assumed ideal conditions, it is shown here that i... View full abstract»

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  • An Adaptive Antenna for Rejection of Wideband Interference

    Publication Year: 1980, Page(s):452 - 459
    Cited by:  Papers (17)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1652 KB)

    A modification to the adaptive array under the directional constraint [1] is proposed to improve its performance of rejecting wideband interference. By analogy to the pattern synthesis of an antenna array which produces a flat null in its radiation pattern, an additional quantity that corresponds to the derivative of the pattern is generated and combined with the standard feedback quantity to cont... View full abstract»

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  • Sensitivity Discriminating Observer Design for Instrument Failure Detection

    Publication Year: 1980, Page(s):460 - 467
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1559 KB)

    A procedure is presented for the design of a pair of sensitivity discriminating Luenberger observers for instrument failure detection (IFD). The proposed IFD scheme permits detection of instrument malfunctions with reduced sensitivity to process parameter variations. The efficiency of detecting instrument malfunctions and the influence of parameter variations are illustrated with an example. View full abstract»

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  • Sensor Fault Detection in a System with Random Disturbances

    Publication Year: 1980, Page(s):468 - 473
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1240 KB)

    Sensor faults are detected in an operating automatic system by a simplified version of the dedicated observer scheme. Control inputs are augmented by a random disturbance of moderate intensity. The dedicated observer in this case is a Kalman filter, driven by a single sensor. This filter provides estimates of the outputs from the other, nonredundant, sensors. A logical combination of these functio... View full abstract»

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  • Stability and Control of a Trap Mode in Synchronous Orbit

    Publication Year: 1980, Page(s):474 - 480
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The possibility of the existence of a trap mode in synchronous orbit is investigated. It is shown that when such a mode exists, certain parameters of the satellite orbit may soon attain undesired equilibrium values, thus complicating the normal stationkeeping operation of the spacecraft. A state-dependent control force which eliminates any such trap mode in the satellite orbit is then investigated... View full abstract»

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  • Sequential Piecewise Recursive Filter for GPS Low-Dynamics Navigation

    Publication Year: 1980, Page(s):481 - 491
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2510 KB)

    The design, implementation, and performance of a real-time estimation algorithm, referred to in this paper as the sequential piecewise recursive (SPWR) algorithm, for the global-positioning system (GPS) low-dynamics navigation system is described. The SPWR algorithm for this application was implemented in single precision arithmetic (32 bit, floating point). Numerical results are presented covaria... View full abstract»

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  • Electronic Search Beam Stabilization

    Publication Year: 1980, Page(s):492 - 499
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1145 KB)

    Compensating for ship's motion (roll and pitch) is a problem fundamental to shipboard radars. The more traditional aproach has been to mechanically stabilize the antenna structure. The alternative approach of stabilizing only the antenna beam is far from being new conceptually, but is more realizable with today's technology. The basic elements are a planar array with an elevation scan capability t... View full abstract»

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  • Kalman filter design for target tracking

    Publication Year: 1980, Page(s):500 - 508
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1205 KB)

    The problem of solving the matrix Riccati differential equation in the design of Kalman filters for the target tracking problem is considered. An algebraic transformation method is used to reduce the order of the Riccati differential equation and to obtain explicit expressions for the filter gains (in terms of the interceptor /target separation range) which results in a substantial reduction of th... View full abstract»

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  • Adaptive Main-Beam Nulling for Narrow-Beam Antenna Arrays

    Publication Year: 1980, Page(s):509 - 516
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1903 KB)

    Narrow-beam, low-sidelobe antennas may be used to enhance communication in the presence of sidelobe interferers. Protection against main-beam interferers as well can be obtained through the use of an adaptive multibeam antenna. Such an antenna, suitable for time-multiplexed, multichannel signals is described here. The objective is to permit successful communication and signal direction-of-arrival ... View full abstract»

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  • High-Resolution Frequency Measurement by Linear Prediction

    Publication Year: 1980, Page(s):517 - 525
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1907 KB)

    The efficacy of linear prediction spectrum analysis (LPSA) (also called autoregressive or maximum entrophy spectrum analysis) for problems concerning narrowband signals in noise is examined by means of Monte Carlo simulation. For the case of pure tones (sinusoids) in white noise, both frequency estimation accuracy and resolution of two closely spaced tones with the linear prediction approach are d... View full abstract»

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  • Information for authors

    Publication Year: 1980, Page(s): 526
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  • Corrections to "Effect of Sensor Errors on Automatic Gunfire Control,"

    Publication Year: 1980, Page(s): 527
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  • Corrections to "Microprocessor-Controlled Digital Shunt Regulator"

    Publication Year: 1980, Page(s):527 - 528
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  • Corrections to "Crossarray Beamforming with a Parametric Receiving Array and a Line Array"

    Publication Year: 1980, Page(s):528 - 529
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  • Corrections to "Certain System Aspects of the Double-Sided Cyclo-Converter"

    Publication Year: 1980, Page(s): 529
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  • Correction to "Transient Modeling of Synchronous Machine-Transformer-SCR Bridge"

    Publication Year: 1980, Page(s):529 - 530
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  • 1980 Pioneer Award

    Publication Year: 1980, Page(s):531 - 532
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  • Development of 1000-mHz Distance Measuring Equipment

    Publication Year: 1980, Page(s):533 - 540
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3512 KB)

    The major radio aids to air navigation are listed. Underlined are those whose signal format is standardized by the International Civil Aviation Organization (ICAO) and they have now all been the subject of the IEEE Aerospace and Electronic Systems Society Pioneer Award, as follows: airborne direction finder/nondirectional beacon (ADF/NDB), Busignies and Moseley, 1959; VHF omnidirectional range (VO... 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