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IEEE Transactions on Communications

Issue 5 • May 1979

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Displaying Results 1 - 13 of 13
  • [Front cover and table of contents]

    Publication Year: 1979, Page(s): 0
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    Freely Available from IEEE
  • The Probability Distribution of the Sum of N Sampled Baseband Outputs of a Product Detector Whose Inputs are Equal Power Coherent Narrow-Band Signals in a Gaussian Channel

    Publication Year: 1979, Page(s):796 - 801
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (414 KB)

    General expressions for the probability distribution and density of the sum ofNlow-pass filtered outputs of a multiplier whose inputs are coherent, equal power noisy narrowband signals are derived in a finite series form. Graphs of the density for several values ofNand two signal-noise ratios are presented and discussed. View full abstract»

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  • Performance of Concatenated Dual-k Codes on a Rayleigh Fading Channel with a Bandwidth Constraint

    Publication Year: 1979, Page(s):801 - 806
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (566 KB)

    The error rate performance, obtained on a Rayleigh fading channel, is determined and illustrated graphically for concatenated codes in which the outer code is a dual-kconvolutional code and the inner code is either a Hadamard block code or a block orthogonal code. Comparison of the performance of these two types of concatenated codes is made on the basis of the same bandwidth utilizatio... View full abstract»

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  • Sensitivity of PSK Modulation Techniques to Nonlinear Distortions

    Publication Year: 1979, Page(s):806 - 812
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (631 KB)

    A model of a PSK transmitter including the modulator, a filter, and a nonlinear amplifier is considered. The envelope fluctuations of the filtered signal and the spectral spreading effect, resulting from nonlinear distortion are analyzed, considering three PSK modulation techniques: conventional four-phase PSK (Q-PSK), offset PSK(OPSK) and logic-PSK(L-PSK). The las... View full abstract»

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  • [Back cover]

    Publication Year: 1979, Page(s): 0
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    Freely Available from IEEE
  • Fiber-Optic Hybrid Digital Transmission System Experiment

    Publication Year: 1979, Page(s):789 - 795
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The hybrid digital transmission system, involving 2Rrepeaters between 3R (Reshaping, Retiming and Regenerating)-repeaters, is a suitable system for fiber-optic transmission. The 2R (Reshaping and Regenerating)-repeatered line enables bit rate free transmission, but cannot suppress the accumulated timing jitter in transmitting pulse streams. The trial 1-8 Mbit/s transmission system, using step-inde... View full abstract»

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  • Serving Area Sizing for Conversion Projects

    Publication Year: 1979, Page(s):821 - 826
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Under the Serving Area Concept, the telephone distribution network is divided into discrete areas called serving areas. To economically balance the distribution and feeder costs required to serve new residential construction, serving areas are sized to include from 200 to 600 ultimate living units. In addition to its use for new residences, SAC is now being successfully applied to the rehabilitati... View full abstract»

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  • A Class of MSK Baseband Pulse Formats with Sharp Spectral Roll-Off

    Publication Year: 1979, Page(s):826 - 829
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Minimum frequency-shift-keying (MSK) is a very attractive modulation technique because of its spectral properties and the constant envelope property of the signal, but out-of-band energy spillover must sometimes be minimized to control co-channel interference. This problem has recently received attention in published articles and, since the pulse shape is the main parameter, many different MSK pul... View full abstract»

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  • Empirical Rain Attenuation Model for Earth-Satellite Paths

    Publication Year: 1979, Page(s):812 - 817
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A set of three simple empirical formulas is given for the calculation of long-term rain attenuation distributions on earth-satellite microwave radio paths from long-term (≥20 yr) distributions of 5-min point rain rates. The calculated results agree well with six sets of rain attenuation data on earth-satellite paths measured in Illinois, Georgia and New Jersey. This simple method, which is a... View full abstract»

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  • Message Delays in FDMA and TDMA Communication Channels

    Publication Year: 1979, Page(s):769 - 777
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    Message delays under a Time Division Multiple Access (TDMA) scheme and the corresponding Frequency Division Multiple Access (FDMA) scheme are studied and compared. Under a TDMA scheme, a network station is assigned a number of slots for each time frame. Under the corresponding FDMA scheme, this station is allocated a separate frequency band for which the ratio between its width and the channel ban... View full abstract»

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  • A New Lower Bound on Intermodulation Noise

    Publication Year: 1979, Page(s):818 - 821
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    We have derived a new lower bound on intermodulation noise. This bound agrees with Maxenchuck and Schiff's bound for carrier plans with low IM noise, but gives significantly higher values as one approaches uniformly spaced plans. The bound is valid for carriers when carrier frequencies are chosen from a set of evenly spaced slots that are spaced by at least the bandwidth of each individual carrier... View full abstract»

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  • An Analysis of One Direction of Window Mechanism

    Publication Year: 1979, Page(s):778 - 788
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A queuing model is presented for the analysis of one direction of window mechanism as used in numerous data communication control procedures e.g., X.25, HDLC and SDLC. Two models of message length are considered viz. fixed length and exponential distribution. A novel approach is used to determine an effective service time to account for possible inserted idle time while waiting for the window to r... View full abstract»

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  • Year-to-Year Variability of Rainfall for Microwave Applications in the U.S.A.

    Publication Year: 1979, Page(s):829 - 832
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    Further extensions of the Rice-Holmberg rainfall prediction model are reported. These extensions describe the variation of rainfall with location in the U.S.A., as well as the standard deviation of their year-to-year variation. Application to the prediction of microwave signal attenuation by rainfall, and the comparison with observed data are illustrated. 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