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IEEE Transactions on Communications

Issue 12 • December 1980

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Displaying Results 1 - 15 of 15
  • [Front cover and table of contents]

    Publication Year: 1980, Page(s): 0
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    Freely Available from IEEE
  • Distributed Scheduling Conflict-Free Multiple Access for Local Area Communication Networks

    Publication Year: 1980, Page(s):1968 - 1976
    Cited by:  Papers (26)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (830 KB)

    A conflict-free distributed scheduling multiple access (DSMA) scheme using a high-speed main channel for data transmission and a subchannel for distributed decision scheduling is described and analyzed. DSMA, which has a variable cycle length and employs a slow speed subchannel for scheduling, is suitable for local area communication networks which employ a data bus as transmission support. With t... View full abstract»

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  • SNR Formula for Linear Delta Modulation with Band-Limited Flat and RC-Shaped Gaussian Signals

    Publication Year: 1980, Page(s):1977 - 1984
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (533 KB)

    Easy to use simple equations of optimum slope loading factor and peak SNR are given for a linear delta modulator having Gaussian input signals with band-limitedRCspectra. The equations are accurate to within 1 dB over a wide range of normalized sampling frequency and forRCspectrum bandwidths of practical interest. View full abstract»

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  • Queueing Systems with Stochastic Time out

    Publication Year: 1980, Page(s):1984 - 1989
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (419 KB)

    In this paper, formulas are derived for queueing systems where the delayed customers are controlled by a stochastic time out, i.e., the delays are limited by a timeTthat is drawn from a general probability distribution. Formulas are also worked out for the case of a limitation of the time spent in the total system (queue + servers). In order to simplify numerical calculations, an approx... View full abstract»

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  • Choice of Regulator for Mutual Network Synchronization

    Publication Year: 1980, Page(s):1989 - 1993
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (518 KB)

    This paper compares time-discrete regulators used for mutual single-ended synchronization of digital networks. The regulators control the phase differences between clocks in the network nodes. These clocks are disturbed mainly by short-term phase and frequency fluctuations and long-term linear frequency drift. The characteristics of the regulators under study are stability, engineering, and implen... View full abstract»

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  • A Digital Approach to Symbol Timing Recovery Systems

    Publication Year: 1980, Page(s):1993 - 1999
    Cited by:  Papers (14)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    An analysis of a symbol timing recovery (STR) technique using digital processing is presented. The ratio of the discrete spectral power at the symbol rate frequency to the nearby continuous spectral power is used as a criterion of STR performance. It is shown that this power ratio equals the quality factor of the narrow bandpass filter and that it does not depend on the value of the delay element.... View full abstract»

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  • The Effects of Filtering and Limiting on the Performance of QPSK, Offset QPSK, and MSK Systems

    Publication Year: 1980, Page(s):1999 - 2009
    Cited by:  Papers (20)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1256 KB)

    The effects on spectral densities, symbol waveshapes and PeversusS/Nperformances, resulting from the addition of filtering followed by hard limiting on raised cosine filtered QPSK, offset QPSK, and MSK point-to-point radio systems are studied. A mathematical model and physical insight are presented into the crosstalk phenomenon between quadrature channels, created in the syst... View full abstract»

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  • On Nonuniform Windowing M-ary FSK Data in a DFT-Based Detector

    Publication Year: 1980, Page(s):2014 - 2019
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (526 KB)

    Nonuniform amplitude windowingM-ary frequency shiftkeying (FSK) data prior to demodulation reduces the crosstalk normally caused by Doppler and oscillator drift. A major disadvantage of such nonuniform windowing is the loss in signal detectability as a result of the mismatch between the nonuniform windowed signal and the uniform windowed detectors. This paper is concerned with the trade... View full abstract»

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  • An Efficient Computational Procedure for the Evaluation of the M/M/I Transient State Occupancy Probabilities

    Publication Year: 1980, Page(s):2019 - 2020
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (207 KB)

    In this note a procedure is given for the numerical evaluation of theM/M/1queue transient state occupancy probabilities which arise in the analysis of dynamic buffer behavior in store and forward networks. The procedure uses the circular coverage function of radar and communication theory to eliminate an infinite series of modified Bessel functions. Computational savings are illustrated... View full abstract»

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  • Editorial Staff and 1980 Index

    Publication Year: 1980, Page(s): 0
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    Freely Available from IEEE
  • Demod-Remod Coherent Tracking Receiver for QPSK and SQPSK

    Publication Year: 1980, Page(s):1945 - 1954
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    A demod-remod coherent tracking loop for QPSK and SQPSK is described and analyzed. This type of receiver is attractive since all of the available signal power is despread and used to generate the tracking error signal when the pulses reaching the nonlinearities are rectangular. The same demod-remod circuit is widely used for bandlimited pulses, for which less than full power is converted to the ca... View full abstract»

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  • Carrier Phase Error in Single Sideband-Partial Response Systems

    Publication Year: 1980, Page(s):2010 - 2014
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    This paper studies the effect of a demodulator carrier phase error on the performance of a synchronous data transmission system. Various single sideband-partial response systems are ranked on the basis of their sensitivity to the phase error. Mean-square distortion due to the phase error and the vertical eye opening of the resulting eye patterns are used as performance measures of comparison. The ... View full abstract»

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  • Comparison of Facsimile Data Compression Schemes

    Publication Year: 1980, Page(s):2023 - 2024
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    Ueno et al. [1] developed a strategy for systematic comparison of facsimile data compression schemes based on Markovian models. An extension of this strategy is described which allows systematic comparison with schemes based on non-Markovian grammars, such as relative address coding (RAC). View full abstract»

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  • Performance Analysis of Demod-Remod Coherent Receiver for QPSK and SQPSK Input

    Publication Year: 1980, Page(s):1954 - 1968
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    A demod-remod coherent tracking loop for QPSK and SQPSK is described and analyzed in [1]. Those results are used to obtain the power spectral density of the equivalent noise of the tracking loop and the probability density function of the steady-state phase error, The effects of the IF and arm filters on the statistics of the noise and QPSK signal are developed. The results of performance computat... View full abstract»

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  • A Simple Model for Computation of Packet Radio Network Communication Performance

    Publication Year: 1980, Page(s):2020 - 2023
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    A model is presented that allows the computation of the approximate level of communication performance for an arbitrary packet radio network using one of a variety of protocols. The communication performance is specified in terms of the end-to-end message delays incurred for a given level of end-to-end traffic rates. The network is specified in terms of its link capacities. While the model makes a... 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