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IEEE Transactions on Communications

Issue 9  Part 1 • September 1980

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Displaying Results 1 - 25 of 45
  • [Front cover and table of contents]

    Publication Year: 1980, Page(s): 0
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    Freely Available from IEEE
  • Preface: Military communications - An overview of the special issue

    Publication Year: 1980, Page(s):1441 - 1444
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  • DSCS III - Becoming an Operational System

    Publication Year: 1980, Page(s):1499 - 1504
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (593 KB)

    This paper addresses the progress of the Defense Satellite Communications System, Phase III (DSCS III), related developmental efforts directed toward facilitating operational employment of the new generation spacecraft, and an overview is provided illustrating how some of the innovations of the DSCS III will be used in the operational environment. The major features of the DSCS III are reviewed an... View full abstract»

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  • VHF Radio System Performance Model for Predicting Communications Operational Ranges in Irregular Terrain

    Publication Year: 1980, Page(s):1637 - 1644
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (828 KB)

    This paper describes a VHF communication system performance model which can predict the probability of successful communications (ps) in irregular terrain for both analog and digital systems. The Longley-Rice model is used to predict the propagation effects. A new noise model, based upon information in CCIR Report 258, is used to help estimate predetection signal-to-noise ratios (... View full abstract»

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  • Signal-to-Noise Ratio of the nth Law Amplifier for Non-Gaussian Noise

    Publication Year: 1980, Page(s):1747 - 1753
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (493 KB)

    The effects of thenth law amplifier on signal-to-noise ratio has not been represented as a function of the input signal-to-noise ratio when the input of the nonlinear device contains nonGaussian noise. In this paper, we analyze these effects and determine the improvement factor represented by the ratio of the output SNR to the input SNR. The results are illustrated by the calculation of... View full abstract»

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  • Does a Larger Intersymbol Interference Result in a Higher Probability of Error?

    Publication Year: 1980, Page(s):1771 - 1773
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (290 KB)

    In this correspondence, we investigate an intuitive conjecture on data communication studies that a larger intersymbol interference (ISI) would result in a higher error probability. It is proved that if: 1) the eye is open, and 2) the additive noise has a symmetric probability density function and its complementary distribution function is concave upward (i.e., convexcup) on the positiv... View full abstract»

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  • [Back cover]

    Publication Year: 1980, Page(s): 0
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    Freely Available from IEEE
  • Voice Communication in Integrated Digital Voice and Data Networks

    Publication Year: 1980, Page(s):1478 - 1490
    Cited by:  Papers (35)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1400 KB)

    Voice communication networks have traditionally been designed to provide either analog signal paths or fixed-rate synchronous digital connections between individual subscribers. These designs were aimed at accommodating the "streamlike" character of speech, which has traditionally been considered to flow from source to destination at a more or less constant rate. By way of contrast, interactive an... View full abstract»

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  • A Two-Level Coarse Code Acquisition Scheme for Spread Spectrum Radio

    Publication Year: 1980, Page(s):1734 - 1742
    Cited by:  Papers (32)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    A scheme for coarse acquisition of spread spectrum signals is described. It is characterized by a two-level acquisition process employing a passive correlator in tandem with a bank of active correlators. A threshold exceedance of the passive correlator initiates an interval of active correlation if any of the active correlators is idle. The scheme combines the rapid search capability of passive co... View full abstract»

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  • 120-Channel Transmultiplexer Design and Performance

    Publication Year: 1980, Page(s):1709 - 1717
    Cited by:  Papers (17)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    A 120-channel transmultiplexer has been developed which interfaces two FDM basic supergroup signals (2 x 60 channels) directly to the digital time division switch or digital transmission systems. The equiplnent exploits a block processing digital SSB-FDM multiplex/demultiplex scheme, and has been built using newly developed high-speed CMOS pipeline multipliers and variable length shift registers. ... View full abstract»

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  • Optimum Deployment of Communications Relays in an Interference Environment

    Publication Year: 1980, Page(s):1608 - 1615
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    The use of communications relays is examined as a means of improving the operation of line-sight-links in an interference or jamming environment. Expressions are derived that define optimum relay locations and the number of relays. These relationships are functions of the system and interference parameters, as well as of the link and interference source geometry. Bounds on flight path orbits of ai... View full abstract»

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  • On Gaussian Error Probabilities in Optical Receivers

    Publication Year: 1980, Page(s):1742 - 1747
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    The output voltage of an optical receiver is statistically a mixture random variable, composed of the sum of a discrete count variable and a continuous Gaussian thermal noise variable. Based on some computer analyses, it is shown here that threshold crossing probabilities using the mixture density can be reliably approximated by integrations of an equivalent continuous Gaussian density. The condit... View full abstract»

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  • Harmonic Distortion of a PLL FM Demodulator for Periodic Signals

    Publication Year: 1980, Page(s):1753 - 1762
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    This paper presents a method which evaluates the harmonic distortion of the phase-locked FM demodulator in the absence of noise. An approach of the harmonic-balance method with the digital Fourier transform is described, and then it is applied to the phase-locked loop in order to calculate the steady-state phase error and harmonic distortion. View full abstract»

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  • Capacity Allocation and Reservation in Common-User Satellite Communications Systems with a Reconfigurable Multiple-Beam Antenna and a Nonlinear Repeater

    Publication Year: 1980, Page(s):1681 - 1692
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1088 KB)

    The use of a flexible transmit multiple-beam antenna (MBA) connected to a nonlinear satellite repeater is investigated as a means of adaptive resource allocation in a common-user communications network comprising different types and deployments of earth terminals. Such a general-purpose network is typically encountered in hybrid systems architectures supporting international command and control fu... View full abstract»

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  • Navy Communications Overview

    Publication Year: 1980, Page(s):1573 - 1579
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    The history of communications in the Navy has shown the importance of the role it plays in conducting military operations. A general overview of Navy communications is discussed, providing the framework for the new developments for the 1980's. Discussion focuses on three major areas: strategic, long-haul two-way, and tactical communications. View full abstract»

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  • An Analysis of Meteor Burst Communications for Military Applications

    Publication Year: 1980, Page(s):1591 - 1601
    Cited by:  Papers (54)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1128 KB)

    This paper presents a methodology for the design and analysis of meteor burst communication systems, with special emphasis on system characteristics of importance to military applications (intercept resistance, jam resistance, nuclear survivability, and encryption considerations). Using stochastic models for the meteor burst process, expressions for the average throughput and average message waiti... View full abstract»

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  • A Survivable Network of Ground Relays for Tactical Data Communications

    Publication Year: 1980, Page(s):1616 - 1624
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    The rationale and a preliminary design concept are presented for a new mobile ground-to-ground communications system to support tactical command and control. Survivability is attained through high connectivity, antenna directivity, and spread-spectrum signals. Each node of the proposed network is equipped with a circular cylindrical array antenna capable of steering a narrow beam in the direction ... View full abstract»

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  • Three Typical Blocking Aspects of Access Area Teletraffic

    Publication Year: 1980, Page(s):1662 - 1667
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    In this paper, an effort is made to represent the military access area grade of service (i.e., probability of blocking) in a more realistic way than before. The circuit switching process is structured into three representative contention phases. The three phases are analytically tractable and are rather typical in existing military networks. All three phases apparently have service properties not ... View full abstract»

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  • Dynamic Performance of a Frequency Controller

    Publication Year: 1980, Page(s):1762 - 1766
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A simple first-order digital frequency controller, based on a voltage-controlled oscillator, is both described and analyzed. Experimental results of the dynamic response of the controller confirm the theoretical predictions. In particular, it is shown that by appropriate adjustment of the loop gain, synchronism may be achieved in one sample period. Some applications are suggested. View full abstract»

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  • Conceptual Approaches to Switching in Future Military Networks

    Publication Year: 1980, Page(s):1491 - 1498
    Cited by:  Papers (2)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    This paper presents conceptual approaches to the synthesis of switching functions in future military networks. The special requirements of military communications are shown to favor the implementation of integrated networks which provide all services (voice, data, imagery) within a single unified network structure. Transparent and transactional methods are defined as contrasting approaches to the ... View full abstract»

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  • Error Performance Measurements on an Experimental 12/14 GHz Satellite Link

    Publication Year: 1980, Page(s):1779 - 1784
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    This correspondence presents results related to measurmg the error performance of an experimental 12/14 GHz satellite link established between Carleton University, Ottawa, Canada, and NASA Ames Research Center, California, in 1976-1977. The measurements were performed on a 9.6 kbit/s voiceband data channel which supported the continuous synchronous transmission of fixed length frames (composite pa... View full abstract»

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  • IFF System Concept Based on Time Synchronization

    Publication Year: 1980, Page(s):1630 - 1637
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    Identification of friend or foe (IFF) in the tactical theater is a complex technical and operational problem with extremely important implications to the nation's success in waging war. A practical, inexpensive IFF system which can reliably identify friends in a hostile ECM environment is desperately needed by the United States and NATO. This paper presents an IFF system concept which utilizes exi... View full abstract»

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  • The Next Generation CONUS AUTOVON

    Publication Year: 1980, Page(s):1460 - 1466
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    The future evolution of AUTOVON, the largest network in the Defense Communications System, is considered from the standpoint of survivability, cost, and commercial technological developments. A study of alternatives conducted by the Defense Communications Engineering Center is summarized and the attributes of the Next Generation AUTOVON are postulated. Related studies and a concept called the Defe... View full abstract»

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  • Future Communications Concepts in Support of U.S. Army Command and Control

    Publication Year: 1980, Page(s):1540 - 1550
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    This paper will describe the proposed communications concepts for the United States Army tactical field forces in the time frame 1990 and beyond. First, there will be a review of previous communications architectures. The review of past architectures provides the contrasts associated with the evolutions of warfare. The paper, then, will highlight technological advances that can provide those capab... View full abstract»

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  • Future Air Force Tactical Communications

    Publication Year: 1980, Page(s):1551 - 1572
    Cited by:  Papers (15)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2600 KB)

    During the 1980's, many improvements will be made in the Air Force's ability to communicate in a battlefield environment. Programs like JTIDS, SEEK TALK, TRI-TAC, and the Ground Mobile Forces satellite communications terminals will improve the security, jam resistance, connectivity, and capacity of today's Air Force tactical communications. Even after these programs have been implemented, however,... View full abstract»

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Aims & Scope

IEEE Transactions on Communications focuses on all telecommunications including telephone, telegraphy, facsimile, and point-to-point television by electromagnetic propagation.

 

 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Naofal Al-Dhahir
University of Texas at Dallas