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IEEE Transactions on Aerospace and Electronic Systems

Issue 5 • Sept. 1975

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Displaying Results 1 - 25 of 39
  • Table of contents

    Publication Year: 1975, Page(s):c1 - 980-b
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  • IEEE Aerospace and Electronic Syatems Society

    Publication Year: 1975, Page(s):c2 - 980a
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  • From the Editor-in-Chief

    Publication Year: 1975, Page(s): 693
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  • Chi-Square Target Models of Low Degrees of Freedom

    Publication Year: 1975, Page(s):694 - 707
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4646 KB)

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  • Doppler-Tolerant Classification of Distributed Targets -- A Bionic Sonar

    Publication Year: 1975, Page(s):708 - 724
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5609 KB)

    Sonar echo analysis that is not affected by relative motion between target, transmitter, and receiver is discussed. Motion-tolerant measurement and recognition of range-distributed targets involves: 1) a determination of the effects of range rate upon echoes from non-planar reflectors and 2) the derivation of a signal, filter bank, and target parameterization scheme that is insensitive to those ef... View full abstract»

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  • Absolute Electron Density Measurement Techniques in Hypersonic Wakes

    Publication Year: 1975, Page(s):725 - 740
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8548 KB)

    New techniques have been evolved for the application of Langmuir probes to the measurement of electron densities in the wakes of hypersonic projectiles flown in ballistic ranges. These techniques concern probe cleanliness, minimization of flow disturbance, minimization of reflected shocks, and the effect of plasma potential. Electron density level estimates obtained with the probes in sphere wakes... View full abstract»

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  • A Modified Monopulse Technique for Radar Tracking with Low-Angle Multipath

    Publication Year: 1975, Page(s):741 - 748
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2050 KB)

    In this paper a new monopluse technique for reducing radar multipath angle-tracking errors is proposed. The solution is achieved by using two monopulse antennas at different heights. The available signals allow one to control the antenna-height diversity so that the elevation angle control signal is not affected by reflected-wave components. The size of the antenna system may be reduced by properl... View full abstract»

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  • High Range-Resolution Monopulse Tracking Radar

    Publication Year: 1975, Page(s):749 - 755
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7210 KB)

    High range-resolution monopulse (HRRM) tracking radar which maintains wide instantaneous bandwidth through both range and angle error sensing channels provides range, azimuth, elevation, and amplitude for each resolved part of the target. The three-dimensional target detail can be used to improve and extend radar performance in several ways: for improved precision of target location, for target cl... View full abstract»

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  • Noise and Transmission Delays in Mutual Synchronization Systems

    Publication Year: 1975, Page(s):756 - 767
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2886 KB)

    This paper considers the effects of noise and transmission delays in a phase-averaging mutual synchronization system. The basic analytical ideas are developed with respect to a two-station system which contains first-or second-order analog phase-lock loops. From the equation describing the phase error dynamics of each system, a generalized Fokker-Planck equation is derived. It is used to obtain a ... View full abstract»

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  • Constrained Improvement MTI Radar Processors

    Publication Year: 1975, Page(s):768 - 780
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2889 KB)

    A new class of staggered PRF MTI radar processors is developed in this paper. These processors are constrained to achieve a specified value of MTI improvement and, subject to this constraint, minimize variations in processor response as a function of target Doppler frequency. The selection of both filter weights and PRF stagger sequences is discussed and a number of representative designs are pres... View full abstract»

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  • The Susceptivity of MTI Systems to White Noise

    Publication Year: 1975, Page(s):781 - 784
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1371 KB)

    The performance of various coherent MTI systems in the presence of white noise is investigated. The single-pulse signal-to-noise ratios at the output of the filters are presented for the case of large system bandwidth. Generalized results, calculated as a function of the system's bandwidth, are given. Finally, those results are compared to the optimum signal-to-noise acheivable by a matched filter... View full abstract»

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  • Applications of Mininum Variance Reduced-State Estimators

    Publication Year: 1975, Page(s):785 - 794
    Cited by:  Papers (10)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2332 KB)

    This paper presents an algorithm for a class of suitably constrained reduced-order filters which minimize the variance of the estimated variables. The algorithm generates both the filter gain history and the true estimation error covariance. The algorithm provides a quantitative criterion which can be used to measure the performance of any reduced-order estimator. Both continuous and discrete esti... View full abstract»

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  • Multiple Target Effects on Monopulse Signal Processing

    Publication Year: 1975, Page(s):795 - 804
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2296 KB)

    Analysis of a typical amplitude-comparison monopulse angle-tracking radar shows that gain variation and bias in the radar error signal can occur under certain conditions involving multiple targets. The general behavior depends on the Doppler separation of the targets relative to system bandwidths; for a specific situation, the gain variation and bias are functions of the relative strengths of the ... View full abstract»

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  • Single Channel Per Carrier Satellite Repeater Channel Capacity

    Publication Year: 1975, Page(s):805 - 813
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4645 KB)

    This paper analyzes the performance of a number of modulation and speech processing techniques that have been considered for single voice channel per carrier transmissions via satellite. This transmission mode is applicable to demand assignment systems, which make possible the most efficient loading of the satellite transponder in applications where the traffic at individual Earth terminals is not... View full abstract»

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  • Digital Automatic Flight Control

    Publication Year: 1975, Page(s):814 - 815
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  • Digital Flight Control: An Approach to Efficient Design

    Publication Year: 1975, Page(s):816 - 828
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    Previous digital design experiences provide guidance and offer solutions for one of the newest digital technology applications: The commercial transport AFCS. In addition to facing well-documented problems of software control and maintainability, operational safety adds a new dimension to the requirements for software reliability. After a general discussion of the problems encountered in past digi... View full abstract»

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  • Architecture Considerations for Digital Automatic Flight Control Systems

    Publication Year: 1975, Page(s):829 - 840
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2852 KB)

    Functional partitioning, redundancy structure, internal communications, and software modularization define the architecture of a digital automatic flight control system (DAFCS). Selection of a suitable system architecture for commercial transports involves such factors as the functional scope, growth provision and flexibility requirements, sensor interfaces, the aircraft's actuator and control sur... View full abstract»

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  • Use of Fiber Optics in Digital Automatic Flight Control Systems

    Publication Year: 1975, Page(s):841 - 850
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4832 KB)

    The availability of digital MSI and LSI has made digital flight control systems more cost effective than analog systems for all but the simplest systems. The organization of a digital flight control system is concerned not only with implementation of the control laws and associated logic but also with the management of the data used in these computations and the organization of the computation. Th... View full abstract»

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  • Digital Computation Makes AFCS More Reliable

    Publication Year: 1975, Page(s):851 - 861
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    In airline service the reliability of a system is more than the confirmed failures for the system; it is the total removal experience of the system. Thus, the reliability of a system lies not only in the piece part failure rates, but also in the capability to verify and isolate failures. The application of digital technology brings several significant reliability improvements to automatic flight c... View full abstract»

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  • Digital Automatic Flight Control is the Answer - What is the Question?

    Publication Year: 1975, Page(s):862 - 882
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4371 KB)

    Beginning with process controls in the mid fifties, digital control systems have seldom met all the claimed advantages and in many cases have been outright failures. Airborne digital computers have just begun to appear in the commercial jet transport market after several years of experimental and military development. The success of these systems in meeting user expectations has not been overwhelm... View full abstract»

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  • Some Aspects of SST Airborne Equipment Application

    Publication Year: 1975, Page(s):883 - 889
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    This paper begins with a review of the advantages of SSTs over subsonic aircraft for long-range travel in Russia. It then describes the navigation and control equipment used in the Russian SST. the TU-144. The reliability of this automatic navigation and control equipment (as well as other equipment) is increased through the use of redundant components. Weight, space, and serviceability requiremen... View full abstract»

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  • Software in Digital System: An Engineer's Approach

    Publication Year: 1975, Page(s):890 - 897
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  • Digital Automatic Flight Control

    Publication Year: 1975, Page(s): 898
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  • Improvement Factor of the Phase-Sensitive Noncoherent MTI

    Publication Year: 1975, Page(s):899 - 902
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (486 KB)

    The phase-sensitive noncoherent MTI detects targets by relative motion between the target and an extended clutter background. In this type of MTI, the phase of the target is compared with the phase of the clutter in an adjacent range bin. Theoretical analysis of the system's performance is presented. The improvement factors for single- and double-delay periodic filters are derived and computationa... View full abstract»

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  • The Effect of Rotating Antennas and Signal Polarization on Doppler Shift

    Publication Year: 1975, Page(s):903 - 905
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (441 KB)

    A study is made of a transmitting antenna spinning relative to a receiving antenna, showing that the received signal undergoes a phase shift which depends upon the relative orientation and the ellipticity conditions of the two antennas. It is shown that this phase shift is important in Doppler distance measuring equipment because it must not be confused with the phase shift caused by the changing ... 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