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IEEE Transactions on Communications

Issue 10 • October 1980

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Displaying Results 1 - 14 of 14
  • [Front cover and table of contents]

    Publication Year: 1980, Page(s): 0
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    Freely Available from IEEE
  • A Spread Spectrum System with Frequency Hopping and Sequentially Balanced Modulation - Part II: Operation in Jamming and Multipath

    Publication Year: 1980, Page(s):1785 - 1793
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (606 KB)

    The broad-band noise performance of a spread spectrum system with frequency hopping and sequentially balanced modulation was analyzed in Part I of this paper. Here, the analysis is extended to include operation In jamming environments and in specular multipath. Bit-error probability and ranging accuracy curves are presented in each case. View full abstract»

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  • [Back cover]

    Publication Year: 1980, Page(s): 0
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    Freely Available from IEEE
  • Priority Channel Assignment in Tandem DSI

    Publication Year: 1980, Page(s):1802 - 1809
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    DSI (digital speech interpolation) is a technique for increasing the utilization of telephone transmission facilities by allocating transmission channels during intervals of active speech (talkspurts) only. The use of DSI for tandem connections, where DSI links are connected in cascade via circuit switching, poses a problem, however, since the voice-quality degradation that is inevitable in each D... View full abstract»

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  • On Noise Immunity of Feedback Communication Systems

    Publication Year: 1980, Page(s):1844 - 1847
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    This paper compares the noise immunities of feedback communication systems for two particular types of systems noise: Gaussian white noise, which is typical of radio and telephone communication, and Poisson-distributed noise, which is typical of laser communication. The comparison shows that as the error probability requirement is made more stringent, the use of feedback will save commensurately m... View full abstract»

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  • Optimal Bandwidth Assignment on Up- and Downlinks of Satellite with Buffer Capacity

    Publication Year: 1980, Page(s):1809 - 1818
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    This paper considers a satellite communication system with the slotted ALOHA access mode where the satellite is assumed to have on-board regeneration ability and the finite buffer capacity for storing noncollided packets from the uplink. The system is analyzed with the downlink bandwidth restricted to 1/L of the uplink bandwidth, and with the conventional slo... View full abstract»

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  • A Fast-Switching Low-Loss 12-GHz Microstrip 4-PSK Path Length Modulator

    Publication Year: 1980, Page(s):1824 - 1828
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A 4-PSK microstrip modulator operating at data rates of up to 800 Mbits/s at 12 GHz is described. The circuit is made of two cells in series. Each cell consists of a 3-dB branch-line hybrid coupler and two BTL p-i-n diodes. One cell provides 0° or 90° phase shifts, and the Other 0° or 180° phase shifts, so that four carrier phase values are obtained by appropriately exciting th... View full abstract»

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  • Quantization Noise in Adaptive Delta Modulation Systems

    Publication Year: 1980, Page(s):1794 - 1802
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    New analytical formulas for quantization noise of two widely known adaptive delta modulation (ADM) systems, continuously variable slope delta modulation (CVSD) and Jayant's firstorder constant factor delta modulation (CFDM), have been obtained. These formulas are derived based upon the previously obtained results for linear delta modulation (LDM) and adaptive differential pulse code modulation (AD... View full abstract»

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  • Multiplexing Low-Speed Buffered Data Terminals

    Publication Year: 1980, Page(s):1838 - 1843
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    When terminals (data and/or voice), connected to an asynchronous time division multiplexer (ATDM), are buffered and operate at low speed, the arrivals at the multiplexer are correlated. In this paper, we consider the finite buffer behavior of an ATDM with such terminals. An earlier study by Rudin [6] is a special case of this approach. The treatment here is also an improvement over the analysis by... View full abstract»

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  • RF Reference Signal Transport by Optical Fibers

    Publication Year: 1980, Page(s):1847 - 1848
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Among the various applications of optical fibers, the transmission of time or frequency reference signals seems to have some interest in view of the immunity of the fibers from electromagnetic disturbances. An analysis of the possible causes of phase fluctuation in a link and a feasibility test for the transmission of a local oscillator signal in a receiving system are reported. View full abstract»

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  • Useful Bounds on the Performance of a Spread-Spectrum Mobile Communication System in Various Fading Environments

    Publication Year: 1980, Page(s):1819 - 1823
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Previous results on the spread-spectrum system for mobile communication proposed by Cooper and Nettleton have been obtained by computer simulation. In this paper, closed-form bounds on the bit error rate are derived for flat, Rayleigh, and Rician fading conditions. For more general types of fading, the saddle point method is used. Since the bounds are easily computed, they are more useful than com... View full abstract»

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  • The Effect of Choosing the Switches for Rearrangements in Switching Networks

    Publication Year: 1980, Page(s):1832 - 1834
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Known rearrangement algorithms proposed by Slepian and Paull (method 1) involve two middle switches of the three-stage Clos network. These switches are chosen arbitrarily. However, the middle switches selection rules affect the rearrangement process. In this paper four methods for choosing the switches were studied. Simulation results and analysis have shown that the allocation of the least used s... View full abstract»

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  • Second-Order Greedy Algorithms for Centralized Teleprocessing Network Design

    Publication Year: 1980, Page(s):1835 - 1838
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    We consider the problem of designing a centralized telecommunication network comprised of multipoint lines given a set of terminal locations, traffic requirements, and a common central site. The optimal solution to this problem is a capacitated minimal spanning tree. We develop a class of heuristic algorithms for the solution of this problem by imbedding existing heuristics, referred to as first-o... View full abstract»

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  • Application of Monolithic CMOS Switched-Capacitor Filters and Amplifiers for Signal Processing

    Publication Year: 1980, Page(s):1828 - 1832
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A custom monolithic CMOS array was designed and integrated for use in meeting the analog conditioning requirements for microsignal processors. These processors are used in "smart" sensors for the purposes of detection and classification. Constrained by very low power dissipation requirements, this array provides a variety of bandpass and low-pass filter functions and programmable CMOS operational ... 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