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IEEE Transactions on Communication Technology

Issue 1 • March 1965

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Displaying Results 1 - 18 of 18
  • Editorial

    Publication Year: 1965, Page(s): 1
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    Freely Available from IEEE
  • Development of a Multichannel PAM Telephone Transmission System

    Publication Year: 1965, Page(s):2 - 5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (443 KB)

    This paper outlines the design features, principles of operation, and performance characteristics of a voice transmission path employed in an electronic telephone switching system. The transmission path is two-wire, bidirectional, and incorporates PulseAmplitude Modulation (PAM) as a means of interconnecting the subscribers' line circuits. The system provides facility for 100 simultaneous conversa... View full abstract»

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  • Storage and Switching Circuits for an Electronic Telephone System

    Publication Year: 1965, Page(s):5 - 13
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (805 KB)

    Sonic wire delay lines are used for the storage functions and transistor switching circuits for the logic functions comprising the common control of this electronic telephone switching system. Because only short-term storage of transient information (identity of the two parties during a telephone conversation) is required, sonic delay lines are uniquely suitable as storage elements. The use of mod... View full abstract»

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  • Blocking in 3-Stage "Folded" Switching Arrays

    Publication Year: 1965, Page(s):14 - 37
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2128 KB)

    Following a brief consideration of multistage switching arrays in general, with particular emphasis on the advantages of 3-stage switching systems, this paper discusses the blocking properties of "folded" vs. "nonfolded" 3-stage switching arrays. Conditions under which a "folded" array will be nonblocking are stipulated. A comprehensive series of formulas are given for determining the internal blo... View full abstract»

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  • The No. 1 Electronic Switching System

    Publication Year: 1965, Page(s):38 - 41
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (538 KB)

    No. 1 ESS is a general purpose telephone switching machine for local, tandem, and toll application, both two and four wire. The need for flexibility leads to the use of stored program control. To meet the requirement of absolute dependability, an unusual system organization is used together with automatic duplicate switching and automatic trouble detection and diagnosis. These actions must not int... View full abstract»

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  • An Integrated PCM Network

    Publication Year: 1965, Page(s):42 - 49
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (745 KB)

    Until recent years, exchanges of information over long distances were made by various means which can be classified in the order of the volume of information to be transmitted: 1) Written documents. 2) Speech in the form of analog signals. 3) Coded means (mainly telegraph and telex). 4) Analog means (television, facsimile). The last three fall within the field of electronics. This paper describes ... View full abstract»

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  • Aspects of, and Experience with, a Reed Switching System using Wired Program Logic

    Publication Year: 1965, Page(s):50 - 55
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    Of the many possible solutions being studied in the search for a new switching system concept, the "quasi-electronic" approach appears promising. It is characterized by the exclusive use of electronic components in combination with sealed dry reed switches, mainly used as crosspoint elements. This crosspoint avoids the transmission problems inherent with full-electronic crosspoints. This paper dis... View full abstract»

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  • Special Problems with a Compact Design of a Time-Division Multiplex Switching System

    Publication Year: 1965, Page(s):56 - 59
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (517 KB)

    One of the appeals of Time-Division Multiplex (TDM) switching systems is the large amount of space saved by there being no need for a space-division switching network. Studies were made in an experimental exchange (Fig. 1) operated at the Central Laboratories of Siemens & Halske since 1962 to determine what conditions are important for a compacting effort. The most important factors are 1) The... View full abstract»

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  • UNICOM System Objectives

    Publication Year: 1965, Page(s):59 - 64
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1234 KB)

    The United States Army has been actively considering deficiencies in the present communication system since the Korean conflict. In 1954 the concept of a Universal Integrated Communications System (UNICOM) was evolved. The fundamental objective of UNICOM is the achievement of an integrated, world-wide switching system, flexible in structure, and designed to meet the needs of substantially all mili... View full abstract»

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  • A Low-Speed Magnetic Memory Device

    Publication Year: 1965, Page(s):65 - 70
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (724 KB)

    Computer and switching control systems in use today typically require some type of memory for system operation. The memory, or data store for the system, serves to hold data in storage until it is needed by a cycle of system operation. Relays, flip-flops, punched cards, magnetic tapes, discs, and drums, ferrite cores, and matrices represent some of the devices available for this purpose. This pape... View full abstract»

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  • Self-Similar Error Clusters in Communication Systems and the Concept of Conditional Stationarity

    Publication Year: 1965, Page(s):71 - 90
    Cited by:  Papers (90)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2231 KB)

    The purpose of this paper is twofold. From the viewpoint of communications engineering, it presents a model of certain random perturbations that appear to come in clusters, or bursts. This will be achieved by introducing the concept of "self-similar stochastic point process in continuous time." The resulting mechanism presents fascinating peculiarities from the mathematical viewpoint. In order to ... View full abstract»

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  • An Adaptive Receiver Approach to the Time Synchronization Problem

    Publication Year: 1965, Page(s):90 - 96
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    In this paper, a frequency shift keying (FSK) system that adapts to unknown signal arrival times is defined and analyzed. The adaptive receiver extracts information concerning the signal arrival times directly from the information bearing signals and uses these measurements in a structure known to be optimum for the case of perfect measurements. The system error rate is derived and plotted as a fu... View full abstract»

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  • Results of a Medium-Speed Parallel Data Transmission Test

    Publication Year: 1965, Page(s):97 - 103
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (611 KB)

    This paper presents the results of a data transmission test in which a data set generating nine frequency-shift channels within the voice band was employed. The tests were conducted over a cross section of the various types of facilities found in the switched telephone network. Relationships between error performance and transmission characteristics were investigated. Also correlation between erro... View full abstract»

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  • A Compact HF Digital Modem with Interference and Multipath Discrimination Characteristics

    Publication Year: 1965, Page(s):104 - 108
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (482 KB)

    A unique experimental digital data modem has been developed that achieves a degree of co-channel interference and multipath discrimination rejection, which are important features when using the HF medium. It has been found feasible to incorporate these provisions in a compact unit which is compatible (with minor interface changes), with existing standard military and civilian transmitting and rece... View full abstract»

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  • Experiments in "SSB FM" Communication Systems

    Publication Year: 1965, Page(s):109 - 116
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (647 KB)

    The investigation reported in this paper describes the generation and detection, with a conventional discriminator, of narrow-band SSB FM, and presents the threshold characteristics of the system. The generation and detection of wide-band SSB FM is also reported. The narrow-band signal is easily detected with a limiter discriminator and offers improved signal-to-noise ratios (SNRs) over convention... View full abstract»

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  • Special Problems in Transistorized Repeater Design for Long-Haul Systems

    Publication Year: 1965, Page(s):117 - 120
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (427 KB)

    When the change is made from tubes to transistors, the repeaters can be buried in the ground, which makes temperature control possible such that after about ten temperature-controlled repeaters, a pilot-controlled repeater will be used. Although a system with buried repeaters makes it difficult to locate a fault, this can be done by a pulsed carrier operating above the useful band and returning to... View full abstract»

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  • An Evaluation of Loading Systems

    Publication Year: 1965, Page(s):121 - 134
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1228 KB)

    Telephone subscriber-line plant consists largely of cable pairs which, for lengths in excess of 18 kilofeet (kf) (18 000 feet), require loading to provide acceptable transmission. Various loading systems have been used over the years to secure optimum transmission with the telephone instruments representing the state of the art at the time. The current trend in exchange plant is to place even the ... View full abstract»

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  • [Front cover and table of contents]

    Publication Year: 1965, Page(s): 0
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    Freely Available from IEEE

Aims & Scope

This Transactions ceased publication in 1971. The current retitled publication is  IEEE Transactions on Communications.

Full Aims & Scope