IEEE Transactions on Communications

Issue 12 • December 1983

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Displaying Results 1 - 12 of 12
  • [Front cover and table of contents]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • Low Complexity Decoders for Constant Envelope Digital Modulations

    Publication Year: 1983, Page(s):1273 - 1280
    Cited by:  Papers (33)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (889 KB)

    Digital angle modulations having input symbol memory can be demodulated using maximum likelihood sequence estimation (MLSE or Viterbi decoding). The demodulation of the more bandwidth efficient of these can require a large number of computations. In this paper, lower complexity decoding approaches are presented. These decoders use a predetermined processing order and a reduced number of survivor s... View full abstract»

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  • Double Symbol Error Rates of M-ary DPSK in a Satellite-Aircraft Multipath Channel

    Publication Year: 1983, Page(s):1285 - 1289
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (493 KB)

    Double symbol error rates ofM-ary differentially coherent phase shift keying (DPSK) systems in a satellite-aircraft multipath channel are evaluated. A joint probability density function (pdf) of two consecutive differential phase errors in the DPSK outputs is newly derived. Numerically calculated results are shown in figures for binary, quaternary, and octonary DPSK systems. It is furth... View full abstract»

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  • High Definition Television (HDTV) - Compatibility and Distribution

    Publication Year: 1983, Page(s):1308 - 1317
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1112 KB)

    High definition television (HDTV) pictures are, by all accounts, dramatically superior to today's NTSC color television, both in resolution and in realism. Picture quality approaching that of 35 mm color film is obtainable by most systems under investigation in recent years. One of the basic premises of a recent SMPTE study was that "the HDTV signal should be capable of a standards conversion ... ... View full abstract»

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  • Correction to "Improvements of Television Picture Quality by Eliminating the Disturbances Caused by Interlaced Scanning"

    Publication Year: 1983, Page(s): 1319
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (266 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • An Integrated Voice-Data Communication System for VHF Links

    Publication Year: 1983, Page(s):1304 - 1308
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    In this work, a combined amplitude-phase modulation communication system is considered. Amplitude modulation is used to transmit a voice signal, and phase modulation is used for data transmission. Such a scheme was studied as a possible realization of a data channel between aircraft and ground station, which can be introduced without great modifications of the actual on-board equipment. The perfor... View full abstract»

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  • End-to-End Blocking for Circuit-Switched Networks: Polynomial Algorithms for Some Special Cases

    Publication Year: 1983, Page(s):1269 - 1273
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    Recursive algorithms for the computation of the end-to-end blocking in circuit-switched networks operating under very general routing schemes have recently been proposed and implemented, but with exponential upper bounds for their running time. For certain important classes of routings, however, we show that algorithms requiring a single pass in all the route trees are sufficient and, thus, have a... View full abstract»

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  • Intelligent PLL Using Digital Processing for Network Synchronization

    Publication Year: 1983, Page(s):1295 - 1303
    Cited by:  Papers (6)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    By combining the advanced technologies of a crystal oscillator, LSI, and a computer, an intelligent phase-locked loop (PLL) which uses digital processing (DP) can be created. This kind of PLL, which is referred to here as DP-PLL, includes a microprocessor and a digitally controlled crystal oscillator. It features excellent performance and countermeasures for disturbances of the input signal by sto... View full abstract»

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  • Dynamic Routing and Call Repacking in Circuit-Switched Networks

    Publication Year: 1983, Page(s):1290 - 1294
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The performance of three dynamic routing techniques for small circuit-switched networks is compared by simulation with three static routing techniques and with a repacking technique for calls in progress. It is found that dynamic routing algorithms improve network performance by increasing the number of paths available for call connection over what would otherwise be available to a corresponding s... View full abstract»

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  • Frequency Counting Modulator

    Publication Year: 1983, Page(s):1280 - 1285
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    One modulation method called the frequency counting modulator (FCM), which can produce various constant envelope signals, is proposed. The FCM is materialized by only digital circuits and, therefore, is easily implemented in a large scale integrated circuit (LSI). From analytical study of the FCM, design formulas are derived for MSK-type modulation, and modulated signal performance features are cl... View full abstract»

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  • Performance Analysis for General PN-Spread-Spectrum Acquisition Techniques

    Publication Year: 1983, Page(s):1317 - 1319
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    This paper presents a unified approach for computing the probability density function (pdf) of the acquisition time for pseudonoise (PN) search algorithms. This approach can be applied to arbitrary search strategies and a priori distributions of the code phase. Furthermore, it is shown that the mean and the variance of the acquisition time can be obtained directly without computing the pdf first. 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