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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Date July 1969

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Displaying Results 1 - 25 of 25
  • Table of contents

    Publication Year: 1969, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Group

    Publication Year: 1969, Page(s): c2
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  • In Memoriam: Helene Frischauer

    Publication Year: 1969
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  • Implications of an Engineering Manpower Shortage

    Publication Year: 1969, Page(s):568 - 573
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2303 KB)

    Many competent sources have been predicting an increasing shortage of graduate engineers to perform needed research and development work in the United States. Consequently, many industrialists, educators, and government officials have been advocating an increased enrollment of students in the engineering curriculum in college in a greater effort to produce more engineers. This paper examines the a... View full abstract»

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  • A Survey of Electronic Attitude Measurement Systems

    Publication Year: 1969, Page(s):574 - 580
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2177 KB)

    Introducing rectangular coordinates for the reference coordinate system and the space-vehicle fixed-coordinate system, it will be shown that the transformation matrixes between both coordinate systems which describe the attitude of the space vehicle can be easily computed as functions of the rectangular coordinates of two precise directions known in both coordinate systems. In detail, an electroni... View full abstract»

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  • Analysis of a Multiplicative Feed System for Monopulse Tracking Applications

    Publication Year: 1969, Page(s):581 - 588
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1774 KB)

    In angle tracking antenna applications, the angle sensing boresight accuracy capabilities are important. The ability of an antenna to precisely determine the bearing angle to a point source is determined by the slope of the control function pattern at boresight. In the presence of extraneous interference, the magnitudes of the sidelobe and backlobe responses are important. Control pattern slope (a... View full abstract»

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  • The Effects of Filtering and Limiting a Double-Binary PSK Signal

    Publication Year: 1969, Page(s):589 - 594
    Cited by:  Papers (8)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1484 KB)

    This paper describes a digital computer simulation of a double-binary phase-shift keying system. This simulation program is used to investigate the effects of limiting action and of the shape and bandwidth of the filter on the system performance, expressed in terms of error probability View full abstract»

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  • Development of a High-Efficiency Cascaded Thermoelectric Module

    Publication Year: 1969, Page(s):595 - 605
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3405 KB)

    This paper describes progress toward the development of a cascaded thermoelectric module capable of an efficiency of 10 percent. The integration of the module with an isotope heat source to provide a long-life high-efficiency space power system is discussed. The basic concept chosen to meet the efficiency objective consists of SiGe elements metallurgically bonded to an interstage plate which in tu... View full abstract»

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  • Phase Monopulse Error Due to Nonuniform Noise Background

    Publication Year: 1969, Page(s):606 - 610
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1189 KB)

    A phase monopulse antenna system can be used for the high accuracy tracking of active or passive objects in space or on earth. Far-field noise sources that are present in the background of the object being tracked will introduce an offset or bias error in the determination of the angle of incidence of the coherent sinusoidal wave received from the source. The dependency of this bias error upon the... View full abstract»

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  • Radar Waveform Synthesis by Mean Square Optimization Techniques

    Publication Year: 1969, Page(s):611 - 619
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2917 KB)

    The synthesis of the phase-modulated waveform whose ambiguity function is the optimum estimate of some desired ambiguity function is accomplished by expanding the phase modulation in an orthogonal series. The ambiguity function x (¿, ¿d)|2 and the value of an arbitrary cost function defined on the (¿, ¿d) plane are then expressed in terms of the coefficients of the orthogonal series. The optim... View full abstract»

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  • A Discussion on System Effectiveness Assurance Elements

    Publication Year: 1969, Page(s):620 - 626
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2225 KB)

    Growing complexity of some technological systems requires engineering assurance that the systems will perform effectively at some distant point in time, when all contractual requirements shall have been met and the first assembled system faces the performance test program. The many new- and old-related assurance disciplines are outlined briefly, as being indispensable to effective engineering acqu... View full abstract»

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  • An Optimum Phase Reference Detector for Fully Modulated Phase-Shift Keyed Signals

    Publication Year: 1969, Page(s):627 - 631
    Cited by:  Papers (11)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1309 KB)

    Many modern telemetry systems which use phase-shift keying (PSK) have receivers which derive a coherent reference from the fully modulated PSK signal itself and thus conserve the energy which otherwise would be allocated to a discrete reference signal. In this paper, an optimum receiver structure for estimating a phase reference from the PSK signal itself is derived and its realization discussed. ... View full abstract»

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  • Stability Measurement Problems and Techniques for Operational Airborne Pulse Doppler Radar

    Publication Year: 1969, Page(s):632 - 637
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1337 KB)

    In the deployment of pulse Doppler (PD) radar, determination of phase and amplitude stability is the most difficult measurement problem. Unique requirements are placed on pulse and carrier stability so that the radar can perform in strong clutter. Because of subclutter visibility and sensitivity specifications, coherent noise, which is insignificant for noncoherent pulse radars, becomes extremely ... View full abstract»

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  • Radio Interferometry of Random Terrestrial Backgrounds

    Publication Year: 1969, Page(s):638 - 644
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2557 KB)

    When relative motion exists between the antenna of a microwave radiometer and a random background, the variance of the radiometer output can, in many cases, be primarily determined by the spatial variance of the background. The result is a decrease in signal-to-noise ratio for small target detection. In this paper an interferometer is examined as a potential means of suppressing this background va... View full abstract»

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  • A Class of Signals for Analog Telemetry over a Coherent Channel

    Publication Year: 1969, Page(s):645 - 653
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2198 KB)

    This paper proposes and studies a class of signals which generalize frequency position modulation (FPM) and pulse position modulation (PPM). The generalization adds a degree of freedom analogous to a duty factor. Varying this quantity has an effect similar to that of varying the time-bandwidth occupancy in an FPM or PPM system, but it does not significantly increase the channel occupancy. The mean... View full abstract»

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  • Radar Calibration Test Satellite

    Publication Year: 1969, Page(s):654 - 660
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2637 KB)

    A satellite has been designed for application to radar calibration. Electromagnetic and mechanical characteristics of the satellite and their influence on the selection of shape and other parameters are discussed. Theoretical and experimental scattering data are included. View full abstract»

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  • Multiplexing Asynchronous Signals Using Bit Stuffing and Retiming Techniques

    Publication Year: 1969, Page(s):661 - 671
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2708 KB)

    This paper discusses the problem of multiplexing asynchronous signals which are clocked from independent sources. Two solutions are offered to this problem: one provides a continuous transmission over a fixed period of time proportional to the bit rate integrity duration, and the other utilizes a bit stuffing technique. The former approach is used when the asynchronous signals are clocked from hig... View full abstract»

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  • A comparison of expected flight times for intercept and pure pursuit missiles

    Publication Year: 1969, Page(s):672 - 673
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    The relative merits of intercept and pure pursuit homing are investigated by comparing the expected flight times to a nonmaneuvering target. The analysis is performed for the initial target heading angle uniformly distributed with arbitrary mean and variance. Two specific examples illustrate that intercept homing holds little statistical advantage over pure pursuit homing except when the speed adv... View full abstract»

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  • Beam Shape Loss and Surveillance Optimization for Pencil Beam Arrays

    Publication Year: 1969, Page(s):674 - 675
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A radar in its surveillance mode requires the programming of the radar beam in fixed angular increments throughout the surveillance volume. Though radar coverage of the volume is complete, returns from possible targets differing only in angular position generally have unequal signal strengths. This is due to both beam shape and multiple beam coverage. The resulting nonuniformity in signal strength... View full abstract»

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  • 1969 Pioneer Award

    Publication Year: 1969, Page(s): 676
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  • Book Review

    Publication Year: 1969, Page(s):677 - 678
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  • NTC Abstracts

    Publication Year: 1969, Page(s):679 - 684
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  • ICIASF Abstracts

    Publication Year: 1969, Page(s):685 - 690
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  • IEEE Aerospace and Electronic Systems Group

    Publication Year: 1969, Page(s): 690-a
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  • Institutional listings

    Publication Year: 1969, Page(s): 690b
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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