IEEE Transactions on Communication Technology

Issue 3 • September 1964

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Displaying Results 1 - 24 of 24
  • [Front cover and table of contents]

    Publication Year: 1964, Page(s): 0
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  • Editorial

    Publication Year: 1964, Page(s): 1
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  • New Developments in U.S. Communications

    Publication Year: 1964, Page(s):2 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (506 KB)

    For more than 80 years the telecommunications industry has been working to bring the art of transmission and switching to the point where it could provide top quality service to everybody over a big, reliable, basic network, and do it well. This basic goal has been largely achieved, but the job is never complete: customers' sights keep rising; communication is increasingly important to the nationa... View full abstract»

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  • British Commonwealth Ocean Cables

    Publication Year: 1964, Page(s):6 - 16
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1167 KB)

    In planning for the first transatlantic telephone cable (1955-56) two systems were considered, the two-cable, flexible repeater, 36-circuit system developed by A. T. & T. and the single cable, rigid repeater, 60-circuit system developed by the British Post Office, primarily for shallow water. The American system, which more readily overcame the problems associated with laying repeaters in armo... View full abstract»

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  • Telecommunication Services and Technical Developments in Japan

    Publication Year: 1964, Page(s):16 - 21
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1154 KB)

    At the end of March 1964, the Nippon Telegraph and Telephone Public Corporation (NTT) had 8.6 million telephones (5.5 million subscriber lines) and 15.2 million circuitkilometers of toll trunks. There are still 1.3 million unfilled telephone application's and there is also a strong demand for complete nationwide subscriber dialing. In order to meet these demands, NTT established a series of five-y... View full abstract»

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  • Telecommunications in Western Europe

    Publication Year: 1964, Page(s):22 - 33
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1514 KB)

    The distinctive character of each major national telecommunications operating agency in Europe is analyzed followed by a brief survey of the national networks and of their interrelation. The most typical transmission and switching systems are introduced, and a summary of the most recent developments is presented. This rapid survey of telecommunications in Europe shows that the political conditions... View full abstract»

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  • The Global Communication Needs of the New Nations of Africa

    Publication Year: 1964, Page(s):34 - 37
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (509 KB)

    The new nations of Africa have unique telecommunications problems which result primarily from the recent history of the continent. Currently the paramount needs are for skilled personnel and for adequate long-distance communications. The training of personnel, especially those to fill top-level positions, must be treated as a number-one priority. The traditional step-by-step evolution of long-dist... View full abstract»

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  • Analysis of Probabilistic Networks

    Publication Year: 1964, Page(s):38 - 40
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB)

    Three methods of analysis of a communication network in which the communication links are assigned finite probabilities of failure are presented. The methods are applied to the computation of the terminal reliabilities for all pairs of nodes. The terminal reliability between a pair of nodes is defined as the probability that there exists at least one path with these nodes as termini. The first met... View full abstract»

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  • Queues in Multichannel Systems Remotely Controlled Via a Common Communication Link

    Publication Year: 1964, Page(s):41 - 48
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    In some control problems where human decision constitutes part of a feedback loop and the decision maker is remote from the plants, the corrective error signals are transmitted in the form of messages via a single communication link. Clearly, a queue of messages may be formed and the problem arises as to how rapidly the system outputs can be corrected. Consider the case of a number of independent ... View full abstract»

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  • Variable and Constant Volume Operation in Telephone Communication System

    Publication Year: 1964, Page(s):49 - 57
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (969 KB)

    The objective in voice communication circuit design is to deliver adequate acoustic power to the listener's ear in the presence of incidental circuit noise and thus permit satisfactory conversation between the talker and listener. The ranges of volumes applied to the circuit and the range received at the listener's ear in general are the same. The average received volume is essentially the average... View full abstract»

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  • Digital Data Dynamic Transmission Systems

    Publication Year: 1964, Page(s):58 - 65
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (795 KB)

    Digital data dynamic transmission systems which employ asynchronous time multiplexing are introduced with the experimental equipment of one of the systems. It is possible to attain dynamic matching between information sources even with time-varying parameters and transmission lines, by searching a time slot for each information signal block only when the subscriber has an information signal block ... View full abstract»

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  • Automatic Equalization of Data Transmission Facility Distortion Using Transversal Equalizers

    Publication Year: 1964, Page(s):65 - 73
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (838 KB)

    The transversal or time domain filter provides one approach to equalization of digital data transmission systems. Automating such an approach depends on finding a systematic method of setting the parameters (i.e., the multipliers) of the filter. In this paper a heuristic theory of the equalization obtainable by transversal filters is described. Based on this theory, a steepest-ascent hill-climbing... View full abstract»

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  • Echo Suppression and Time Delay, A Subjective Evaluation

    Publication Year: 1964, Page(s):74 - 82
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (911 KB)

    The combined effects of time delay and the action of a particular type of echo suppressor have been evaluated during a controlled experiment. Users performed a highly structured task designed to approximate real conversation either over a normal, control circuit or over one having 620 ms of delay and fitted with an echo suppressor. Little difference was noted in user reaction to, and acceptance of... View full abstract»

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  • A Theoretical Synchronization System for Use with Noisy Digital Signals

    Publication Year: 1964, Page(s):82 - 90
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    A synchronization system for use with noisy digital signals and a theoretical analysis of its operation is given. The system uses bit-by-bit correlation of the random bit stream input to determine synchronization error. The contention is that any periodically varying signal may be correlated period-by-period to find relative period synchronization. No knowledge of the information content of the si... View full abstract»

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  • Optimum Pre-Emphasis and De-Emphasis Networks for Transmission of Television by PCM

    Publication Year: 1964, Page(s):91 - 96
    Cited by:  Papers (12)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (842 KB)

    The advantages attendant to the use of pre-emphasis and de-emphasis networks in a PCM television system are examined. The optimum pre-emphasis network is obtained by maximizing the ratio of peak-peak signal to rms weighted noise with the coder input constrained to prevent overload. The results show that for a system using a 12-Mc sampling rate the weighted quantizing noise in the video band can be... View full abstract»

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  • The Improvement of Envelope Detector Performance Through the Use of a Nonlinear Transformation

    Publication Year: 1964, Page(s):97 - 102
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    In the design of many digital receiver systems, practical design considerations may dictate the use of envelope detectors and RC integrators. This paper analyzes the improvement which can be gained by the insertion of a nonlinear transformation between the envelope detector and the RC integrator. The characteristic curve of the optimum nonlinear transformation is determined and is found to yield a... View full abstract»

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  • Additional "Comments on two papers about syncronization"

    Publication Year: 1964, Page(s): 103
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    In recent years there have been numerous studies of reception or communications systems for the demodulation of signals which are received with additive gaussian noise. Many of these studies have been based on the work of Youla. In FM modulation the signal is subjected to linear filtering (pre-emphasis) prior to modulation and it is not immediately apparent how to apply the work of Youla directly.... View full abstract»

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  • Optimum receivers

    Publication Year: 1964, Page(s):103 - 104
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (235 KB)

    In recent years there have been numerous studies of reception or communications systems for the demodulation of signals which are received with additive gaussian noise. Many of these studies have been based on the work of D.C. Youla ["The use of maximum likelihood in estimating continuously modulated intelligence which has been corrupted by nolse," IRE TRANS. ON INFORMATION THEORY, vol. PGIT-3, pp... View full abstract»

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  • An impulse noise cancellar

    Publication Year: 1964, Page(s):104 - 105
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB)

    The impulse-noise cancelling device recently described by W.L. Black [IEEE Trans on Comm. Systems, vol. CS-11, p. 506; December, 1963] has in principle two noteworthy properties that he did not mention. First, the canceller does not fail completely when two noise pulses overlap in time, since the residual d.isturbance, if the two pulse responses are very different in magnitude, is ideally of the o... View full abstract»

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  • Pseudorandom scanning

    Publication Year: 1964, Page(s):105 - 107
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (338 KB)

    Pseudorandom scanning has been ingenuously used by S. Deutsch ["Narrow-band TV uses pseudorandom scan," Electronics, vol. 35, pp. 49-51, April 27 1962] to reduce television frame rate and hence bandwidth. In this communication we shall consider the use of pseudorandom scanning in transmitting still (rather than motion) pictures. We assume thathe picture is transmitted through a onedimensional chan... View full abstract»

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  • Average Message Error Probability for Systems with a Varying Bit Error Probability

    Publication Year: 1964, Page(s): 107
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    First Page of the Article
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  • Classification of the Processes of Modulation and Transmission

    Publication Year: 1964, Page(s):108 - 109
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    First Page of the Article
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  • A Small Teleprinter Switching System

    Publication Year: 1964, Page(s):110 - 111
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (322 KB)

    This communication describes a "Dialed Connection" teleprinter switching system designed to operate with machines not equipped with a stunt box (device used to provide control functions on late model teleprinters). The answer back code for old model teleprinters was accomplished by generating each code at the switching center. The term "old model teleprinter" refers to those machines which will no... View full abstract»

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  • [Back cover]

    Publication Year: 1964, 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