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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • July 1971

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Displaying Results 1 - 25 of 40
  • Table of contents

    Publication Year: 1971, Page(s): c1
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  • IEFE Aerospace and Electronic Systems Group

    Publication Year: 1971, Page(s): c2
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  • From the Editors

    Publication Year: 1971, Page(s): 577
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  • The Engineer as a Radical?

    Publication Year: 1971, Page(s):578 - 584
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1966 KB)

    Outdated and rigorous curricula are not only producing engineers unsuited to the challenges of the 1970's, but they are scaring off many of the most creative and intelligent students. Engineering education has become an endurance test; the excitement has been lost. Most students strive only to get out. Engineering schools have not yet realized the importance of the involvement of engineers in curr... View full abstract»

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  • A Practical Method of Maintainability Allocation

    Publication Year: 1971, Page(s):585 - 589
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1043 KB)

    A practical method of allocating the system maintainability (M) requirement to lower functional equipment levels is described. The use of this method minimizes trial and error in establishing values for each equipment item and the amount of tradeoffs required in apportionment relative to equipment complexity and M design characteristics. It has flexibility in application in that it can provide ini... View full abstract»

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  • Telecommunications Technology in Metropolitan Areas

    Publication Year: 1971, Page(s):590 - 594
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (948 KB)

    The electronic communication technology available today offers the possibility of changing many patterns of information transfer in urban areas. There are three major trends which are converging to make this change possible. These are: 1) the technology to permit wideband information transfer manifested in the existing 2300/CATV/Cable System and in modification of the Bell network for wideband ser... View full abstract»

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  • Summary of European Solar Cell Activities

    Publication Year: 1971, Page(s):595 - 605
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2574 KB)

    A review of activities in the solar cell field by the European manufacturers and agencies is presented. These activities include considerable efforts in research, development, and production of solar cells, covers, and solar cell arrays. Details of the qualification and use of European cells and covers on the Intelsat IV program are presented. View full abstract»

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  • Structural Failures in Light-weight Solar Cell Arrays under Thermal Cycling

    Publication Year: 1971, Page(s):606 - 612
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3079 KB)

    Several different types of small silicon solar cell arrays mounted on lightweight honeycomb panels and on flexible substrates were subjected to long-term thermal cycling tests between -160 and 600C in dry nitrogen. Other tests included immersion in liquid nitrogen and vibration fatigue tests in excess of one million cycles. The arrays experienced a reduction in output caused by contact failure, fr... View full abstract»

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  • Parameter Optimization of a Nutation Damper Via the Second Method of Liapunov

    Publication Year: 1971, Page(s):613 - 616
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (810 KB)

    The principle of parameter optimization of a linear time-invariant system via the second method of Liapunov is applied to optimize the parameters of a nutation damper suggested recently. Numerical results are derived, and it is indicated that the present values of optimum parameters agree closely with those obtained earlier by an approximate method. View full abstract»

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  • Error Analysis of Space-Stable Inertial Navigation Systems

    Publication Year: 1971, Page(s):617 - 629
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2372 KB)

    The error equations for a space-stable inertial navigation system are derived. This is done by directly perturbing the mechanization equations in the inertial frame and then transforming in open-loop fashion to the local-level frame. A rotating inertial platform and velocity and altitude damping are considered. The relations between errors in space-stable and local-level systems are noted. Numeric... View full abstract»

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  • Resolution in Doppler and Acceleration with Coherent Pulse Trains

    Publication Year: 1971, Page(s):630 - 636
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1958 KB)

    The resolution properties and clutter performance of a simultaneous Doppler and acceleration measurement are investigated in detail with particular emphasis given to coherent pulse trains. The analysis is based on the concept of a matched-filter receiver, although receiver weighting of the type that reduces Doppler sidelobes is also analyzed in detail. Near the main lobe of the acceleration respon... View full abstract»

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  • A qualitative study of proportional navigation

    Publication Year: 1971, Page(s):637 - 643
    Cited by:  Papers (128)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1118 KB)

    This paper represents a study of the trajectories of an ideal missile homing on a target according to the proportional navigation law. A qualitative study is performed and conditions are determined which enable one to demonstrate that: 1) the missile always reaches the target regardless of the initial conditions at launch; 2) the rotational rate of the line of sight is decreasing at the pursuit en... View full abstract»

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  • Ideal Limiting of Periodic Signals in Random Noise

    Publication Year: 1971, Page(s):644 - 651
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1341 KB)

    A method based on Hermite polynomials is developed for analysis of the output resulting from passing Fourier expandable signals and noise through general zero-memory devices. New results are developed for the output time and autocorrelation functions. Special results are generated for an ideal clipper. Techniques for obtaining results for practical cases are discussed. The method itself can be mod... View full abstract»

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  • An Optimum Phase Synchronizer in a Partially Coherent Receiver

    Publication Year: 1971, Page(s):652 - 661
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1590 KB)

    The derivation and the statistical properties of the maximum a posteriori probability phase estimator of a sinusoidal signal in white Gaussian noise are considered. The probability density function of the phase estimate is developed. The estimator efficiency and performance as a phase synchronizer in a partially coherent receiver are calculated and compared with a first-order phase-locked loop pha... View full abstract»

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  • A New Sampling Procedure for the Synthesis of Linear Transversal Filters

    Publication Year: 1971, Page(s):662 - 670
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2066 KB)

    In linear transversal filters for signal processing, the impulse response of the filter is syntheszed in a sampled form by means of a tapped delay line with weighted and summed taps. The synthesis procedure consists of sampling the specified impulse response at appropriate intervals and using the sample values as the tap weights. A nonuniform sampling procedure for the synthesis of the impulse res... View full abstract»

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  • Recursive Methods for Computing Detection Probabilities

    Publication Year: 1971, Page(s):671 - 676
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1203 KB)

    Recursive methods are drived for computing detection probabilities for general fluctuating targets in Gaussian noise. For the generalized chi-square family of fluctuating targets, very simple and convenient recursive algrithms result. The methods are also extended to cell-averaging CFAR. Although the detection probability is expressed iw: terms of an infinite series, a convenient expression is der... View full abstract»

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  • Resolution Performance of Pulse Trains with Large Time-Bandwidth Products

    Publication Year: 1971, Page(s):677 - 685
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2439 KB)

    The coherent pulse train has good clutter suppression performance because the energy in its matched-filter response is essentially concentrated within sharp ambiguous spikes. However, this is so only when the Doppler distortions are neglected, so that the Doppler effect is taken as a simple translation of the carrier frequency. This paper analyzes the consequences of Doppler distortions on the res... View full abstract»

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  • A Self Bit Synchronizer Matched to the Signal Shape

    Publication Year: 1971, Page(s):686 - 693
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1291 KB)

    A suboptimum self bit synchronizer is considered that matches the signal shape, i. e., operates making a clever use of the knowledge of the signaling waveform. The noise performance of this system is analyzed for high signal-to-noise ratios, and an expression is obtained for the variance of the timing errors. This variance is compared with that of systems proposed by other authors on the basis of ... View full abstract»

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  • Comments on the 1970 Pioneer Award

    Publication Year: 1971, Page(s):694 - 696
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  • Comments on the 1970 Pioneer Award

    Publication Year: 1971, Page(s):696 - 697
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  • Comments on "Crime Deterrent Transponder System"

    Publication Year: 1971, Page(s): 697
    Cited by:  Papers (1)
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  • Effect of Envelope Limiting in Adaptive Array Control Loops

    Publication Year: 1971, Page(s):698 - 700
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (451 KB)

    The properties of an adaptive array antenna, including transient response rate and control loop noise, depend on the intensity of the external noise field. This dependence can be reduced by envelope hard limiting in the control loops, without degrading the performance of the adaptive array. View full abstract»

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  • The Effect of Aircraft Lateral Dynamics on Aircraft Positioning Accuracy When Using Loran-C

    Publication Year: 1971, Page(s):700 - 704
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (786 KB)

    The dynamics of an aircraft following a fixed course line using Loran-C for position fixing are shown to interact with Loran-C receiver dynamics to result in cross-track aircraft positioning errors that are smaller than cross-track Loran receiver errors. In a particular case considered, this error reduction is on the order of 50 percent. View full abstract»

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  • Automatic Pulsating Locator Beacons and Receivers

    Publication Year: 1971, Page(s):704 - 706
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    First Page of the Article
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  • The Detection Performance of the Siebert and Dicke-Fix CFAR Radar Detectors

    Publication Year: 1971, Page(s):706 - 709
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    The Siebert and the Dicke-fix CFAR radar detectors, used to maintain a constant false alarm rate (CFAR) in radar receivers under very similar circumstances, are considered. The Siebert detector represents the maximum-likelihood detection procedure for a signal in Gaussian noise of unknown power level, whereas the Dicke-fix makes use of a bandpass limiter to normalize the input and thus ensure a co... 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