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IEEE Transactions on Aerospace and Electronic Systems

Issue 3 • May 1981

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Displaying Results 1 - 25 of 33
  • Table of contents

    Publication Year: 1981, Page(s): c1
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    Freely Available from IEEE
  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1981
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    Freely Available from IEEE
  • Harry Rowe Mimno

    Publication Year: 1981, Page(s): 321
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  • Pulse Synchronizing DC-to-DC Converter

    Publication Year: 1981, Page(s):322 - 328
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1291 KB)

    The new dc-to-dc converter driven by the external pulse is presented. The principle is based on the synchronizing phenomenon in the transistor core multivibrator. There are the voltage feed- back in the OFF interval and the current feedback in the ON interval. The flux of the saturable core is changed along the minor hysteresis loop. The operations are explained by the aid of the averaged method o... View full abstract»

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  • Performance of a Mean Level Detector Processing M-Correlated Sweeps

    Publication Year: 1981, Page(s):329 - 334
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1635 KB)

    The performance of a mean level detector processing M-correlated consecutive sweeps is derived. Performance when sweeps are independent can be obtained simply as a special case. The background noise is assumed stationary Gaussian and pulses are fluctuating according to the Swerling I model. Results are obtained for both finite and infinite reference noise samples. It is shown that for fixed M the ... View full abstract»

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  • Acquisition of Pseudonoise Codes in FH Systems

    Publication Year: 1981, Page(s):335 - 341
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2010 KB)

    Acquisition schemes for acquiring pseudonoise (PN) signals in a frequency hopping (FH), spread spectrum (SS) system are presented. For the purpose of acquiring the PN code the received signal is modeled by an autoregressive (AR) process. The parameters of the AR process are determined by identifying a related set of parameters called the partial correlation coefficients. The power spectrum of the ... View full abstract»

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  • Concatenated Sequences for Spread Spectrum Systems

    Publication Year: 1981, Page(s):342 - 350
    Cited by:  Papers (12)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2436 KB)

    Concatenated sequences are suggested and developed for use in spread spectrum (SS) systems. Special receiver realization is discussed and it is shown that the concatenated sequences offer great advantage in reducing the size of the matched filter correlators (MFC) in the SS receiver. Experimental systems have been built using concatenated sequences and their performance is reported here. It has be... View full abstract»

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  • Start-Up Transient of a DC-to-DC Converter Powered by a Current-Limited Source

    Publication Year: 1981, Page(s):351 - 363
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2427 KB)

    An analysis technique is presented which permits the designer to explore the start-up transient of a dc-to-dc converter when it is powered by a current-limited source. The current versus voltage characteristics of the source are superimposed upon those of the dc-to-dc converter. By noting the nature of the intersection of these curves in the voltage-current plane, we are able to predict whether or... View full abstract»

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  • A New Class of Polyphase Pulse Compression Codes and Techniques

    Publication Year: 1981, Page(s):364 - 372
    Cited by:  Papers (63)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2086 KB)

    A new class of symmetric radar pulse compression polyphase codes is introduced which is compatible with digital signal processing. These codes share many of the useful properties of the Frank polyphase code. In contrast with the Frank code, the new codes are not subject to mainlobe to sidelobe ratio degradation caused by bandlimiting prior to sampling and digital pulse compression. It is shown tha... View full abstract»

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  • DC/AC High Power Cell Structure Improves Sine Generator Performance

    Publication Year: 1981, Page(s):373 - 379
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1569 KB)

    A new generation of dc/ac sine generators, based on dc/dc, pulse-width modulation (PWM) storage converter structure operating with rectified sine wave control and associated with a controlled bridge, is described. The efficiency, harmonic distortion, and transien't behavior are better in dc/dc sine convertors than conventional dc/ac sine convertors. Continuous non-linear or linear methods previous... View full abstract»

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  • Overlapping Pulse Trains

    Publication Year: 1981, Page(s):380 - 385
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1581 KB)

    An event happens the first time several periodic pulse trains all overlap (are all "on") simultaneously. Assuming that all pulse trains are randomly located with respect to each other, it is argued that the time required is approximately an exponential random variable. A formula for the mean of this time and the results of some tests by computer simulation are given. View full abstract»

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  • Turn-Off Characteristics of Power Transistors Using Emitter-Open Turn-Off

    Publication Year: 1981, Page(s):386 - 391
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1419 KB)

    As compared with conventional reverse-biased turn-off, emitteropen turn-off provides superior transistor turn-off characteristics. Not only are the storage time and the fall time of the power transsistors much reduced, but also the device reverse-biased second breakdown phenomenon, commonly associated with turn-off of inductive load, is eliminated. Furthermore the storage time tolerance due to dev... View full abstract»

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  • The Detection Performance of a Modified Moving Window Detector

    Publication Year: 1981, Page(s):392 - 400
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2154 KB)

    The modified moving window detector for binary integration has a shorter window length compared with the ordinary moving window detector because of the addition of a third threshold. When the second threshold is reached, a counter begins to count until the third threshold is reached. A graphical method using a probability chain is developed here to analyze and to calculate the detection performanc... View full abstract»

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  • 14.5-14.8 GHz Frequency Sharing by Data Relay Satellite Uplinks and Broadcasting-Satellite Uplinks

    Publication Year: 1981, Page(s):401 - 409
    Cited by:  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2583 KB)

    Data relay satellites are being developed to provide real-time data links between research satellites in low earth orbits and central data acquisition and processing facilities. Frequency assignments for data relay satellite links will be made in bands allocated internationally to the space research service. One of the bands which will be used lies between 14.5 and 15.35 GHz, where the space resea... View full abstract»

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  • Scanning Spaceborne Synthetic Aperture Radar with Integrated Radiometer

    Publication Year: 1981, Page(s):410 - 421
    Cited by:  Papers (93)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3042 KB)

    Spaceborne synthetic aperture radar systems are severely constrained to a narrow swath by ambiguity limitations. Here a vertically scanned-beam synthetic aperture system (SCANSAR) is proposed as a solution to this problem. The potential length of synthetic aperture must be shared between beam positions, so the along-track resolution is poorer; a direct tradeoff exists between resolution and swath ... View full abstract»

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  • Algorithms for Power Converter Design Optimization

    Publication Year: 1981, Page(s):422 - 432
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3148 KB)

    A practical optimization approach for power converters is established which allows conception of a design to meet all powercircuit performance requirements and concurrently to optimize a defined quantity such as weight or losses. In addition to facilitating a cost effective design, the computer-aided approach provides a means to readily assess a) the weight-efficiency tradeoff, b) impacts of conve... View full abstract»

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  • Tracking Accuracies with Position and Rate Measurements

    Publication Year: 1981, Page(s):433 - 437
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    Tracking accuracies for the radial component of motion are computed for a track-while-scan radar system which obtains position and rate data during the dwell time on a target These results will be of interest to persons developing trackers for pulse Doppler surveillance radars. The normalized accuracies, computed for a two state Kalman tracking filter with white noise maneuver capability, are show... View full abstract»

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  • High-Order Intermodulation Effects in Digital Satellite Channels

    Publication Year: 1981, Page(s):438 - 445
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1959 KB)

    The phenomenon of intermodulation generation due to passive and normally linear components is sometimes called passive intermodulation. A unique characteristic of passive intermodulation interference in communications satellites is that the products causing trouble are of high orders. Due to the immense combinatorial complexity of the problem, both exact analysis and direct simulation are almost i... View full abstract»

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  • Omega Lane Ambiguity Resolution Using Methods of Statistical Decision Theory

    Publication Year: 1981, Page(s):446 - 460
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2380 KB)

    Lane ambiguity is an inherent problem of navigation systems using phase measurements. A lane ambiguity resolution technique combining methods of hyperbolic and range-range modes of navigation has been developed. The basis of this approach is that the ensemble of received phases at any location forms a unique set and therefore the lane resolution problem reduces to finding a position such that the ... View full abstract»

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  • On the Extraction of Features from Slowly Wandering Patterns

    Publication Year: 1981, Page(s):461 - 466
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (805 KB)

    The problem of feature extraction with slowly wandering patterns is considered. Models are proposed to characterize the moving patterns. Using the perturbation theory of symmetric matrices, recursive relationships between the features at successive time intervals are obtained. View full abstract»

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  • Corrections to "Stability of Gyro in a Vehicle Spinning with Uncertain Angular Velocity"

    Publication Year: 1981, Page(s): 466
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  • Corrections to "Orientation of Measurement Sensors for Optimum End-of-Life Performance"

    Publication Year: 1981, Page(s): 466
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  • Corrections to "Detection of Target Multiplicity Using Monopulse Quadrature Angle"

    Publication Year: 1981, Page(s):466 - 468
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  • Corrections to "Sampling Bandpass Signals"

    Publication Year: 1981, Page(s): 468
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  • Doppler Radar Tracking of Hostile Fire

    Publication Year: 1981, Page(s):469 - 471
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (354 KB)

    Two fixed parameters define a two-dimensional projectile track relative to a radar: an arrival angle, and the expected distance of closest approach (miss distance). Both parameters can be obtained explicitly, the angle from the history of the phase difference between two elements of an interferometer antenna, and the miss distance from the history of the Doppler frequency. 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