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IEEE Transactions on Communication Technology

Issue 3 • Date June 1967

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Displaying Results 1 - 25 of 32
  • [Front cover and table of contents]

    Publication Year: 1967, Page(s): 0
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    Freely Available from IEEE
  • A Tribute to L. G. Abraham - 1901-1967

    Publication Year: 1967, Page(s): 313
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    Freely Available from IEEE
  • A Multicomputer Message Switching Data Processing System

    Publication Year: 1967, Page(s):314 - 321
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1043 KB)

    This paper describes a number of new techniques for data processing in a message switching center that will improve system reliability and increase system availability. This data processing system contains several processor equipment pools introduced to avoid costly duplexing, yet it will keep equipment failures from interrupting operation. The system uses list processing techniques for memory all... View full abstract»

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  • Development of national communication systems [Introduction to the following four papers]

    Publication Year: 1967, Page(s):322 - 323
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    Freely Available from IEEE
  • Telecommunications in Sweden

    Publication Year: 1967, Page(s):324 - 333
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1744 KB)

    The main tasks of the Swedish Telecommunications Administration are the telephone, telegraph, and telex services. The staff of the Administration includes about 40 000 persons. About 31/2 million telephones are serviced, Each year 250 000 new telephones are installed. Data transmission is a rapidly expanding new branch of activity. Switching equipment is of the crossbar type, or based on the 500-l... View full abstract»

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  • The Australian Telecommunications Network

    Publication Year: 1967, Page(s):333 - 337
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (567 KB)

    The Australian Telecommunications Network, which is operated by the Government through the Postmaster-General's Department, is among the world's more advanced systems. Telephone, telegraph, and television services are provided to virtually all settled areas of the vast Australian continent. In very sparsely settled areas, outpost radio telephone services provide for essential communication. The ma... View full abstract»

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  • The Italian Telephone Long Distance Network

    Publication Year: 1967, Page(s):338 - 344
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (671 KB)

    A description is given of the Italian Long Distance Network, which interconnects the 21 Transit Regional Centers of the Country and the international and intercontinental telephone networks. In particular, the characteristics of coaxial cables and radio links are detailed, as are the criteria to be adopted in order to guarantee a grade of service acceptable to subscribers. Fundamental outlines are... View full abstract»

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  • Telecommunication Expansion in India

    Publication Year: 1967, Page(s):344 - 350
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (842 KB)

    This paper reviews the problems and methods of development of telecommunications in India from 1949 to 1966, and examines plans for 1966 to 1971. Statistical information is given on the financial investment and the physical targets together with the features and the nature of development. The orientation necessary to achieve this high rate of development is discussed. Keeping the network financial... View full abstract»

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  • Air Traffic Control G/A/G Channel Loading Investigation

    Publication Year: 1967, Page(s):350 - 359
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    Data and results of importance in communications systems design are presented from a recent survey characterizing GroundAir-Ground communication channels in Air Traffic Control. Channel utilization is studied because it is a measure of the controller's communication work load. Relationships between channel utilization and air traffic parameters are derived from the data for various controller posi... View full abstract»

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  • DICOSE - A New Tool for Communications Studies

    Publication Year: 1967, Page(s):360 - 364
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    This paper describes a unique laboratory facility which has been set up for automated evaluation of digital communication systems. This facility contains a large scale, stored-program communication processor interconnected to a number of experimental transmitting and receiving sites and telephone transmission facilities. By interconnecting the processor and the communication facilities to experime... View full abstract»

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  • The Scheduling Problem in Satellite Communications Systems

    Publication Year: 1967, Page(s):364 - 371
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (851 KB)

    In satellite communications systems, the assignment of communications channels to users is a separate function from that of satellite acquisition and the establishment of actual communications circuits. A discussion of this scheduling problem is presented with emphasis on system analysis and mathematical formulation. The system factors pertinent to the scheduling problem are classified into three ... View full abstract»

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  • Evaluation of Error Correction Block Encoding for High-Speed HF Data

    Publication Year: 1967, Page(s):371 - 382
    Cited by:  Papers (22)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1235 KB)

    Error-pattern data gathered from an operational HF digital data transmission system are shown to have characteristics which permit their direct classification into predominantly burst-, random-, and periodic-error categories. These data are useful in a proposed method for effectively evaluating and designing forward error detection and correction devices using interleaving and block error-correcti... View full abstract»

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  • Data Communication Through the Atmospheric Burst Error Channel

    Publication Year: 1967, Page(s):383 - 389
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (717 KB)

    Simple and easily utilized techniques are suggested for reliable transmission of binary data in the presence of atmospheric noise bursts. The techniques utilize the time statistics of the noise bursts, now known to be log-normal, and operate on one-way channels. Two modes of transmission are distinguished. The first mode involves double or triple transmission of an error detection code word. The s... View full abstract»

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  • Forced-Erasure Decoding and the Erasure Reconstruction Spectra for Group Codes

    Publication Year: 1967, Page(s):390 - 397
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (789 KB)

    Forced-erasure decoding, an easily implementable technique for realizing the fullest capability of a code, is presented and discussed. This type of decoding combines the implementation simplicity of digital decoding with the performance enhancement expected of correlation decoding techniques. Adaptive versions, with and without interleaving for fading channels, are described. An exact expression f... View full abstract»

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  • The Performance of Forced-Erasure Decoding

    Publication Year: 1967, Page(s):397 - 404
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (738 KB)

    Forced-erasure decoding, an easily implementable technique for realizing the fullest capability of a code, is described and evaluated. This type of decoding combines the implementation simplicity of digital decoding with the performance enhancement expected of correlation decoding techniques. Adaptive versions, with and without interleaving for fading channels, are also treated. The simulation of ... View full abstract»

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  • A Stochastic Model of Message Interchange on a Channel With Transmission Delay

    Publication Year: 1967, Page(s):405 - 412
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    This paper describes a technique for analyzing the statistical behavior of a two-way communication system with transmission delay (D) . Messages are transmitted and received by means of servers located at the terminal stations. If D > 0 , each server is uncertain of the present state of the other, and may initiate tran... View full abstract»

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  • On Coded Partially Phase-Coherent Communication Over a Gaussian Channel

    Publication Year: 1967, Page(s):413 - 416
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (354 KB)

    Error probabilities for 2northogonal signals under partially phase-coherent reception are derived by a simple method and then illustrated. The amount of phase coherence is related to the efective signal energy per bit to noise density ratio. The joint effect of timing error and noisy phase reference on system performance is examined in detail. View full abstract»

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  • Cycle Slipping in Phase-Locked Loops

    Publication Year: 1967, Page(s):417 - 421
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    This article shows that the expected first-slip time of a phase-locked loop of arbitrary order can be found as the solution of a first-order linear differential equation, to which formal solutions are easily written. Computation of an exact solution involves being able to evaluate a certain conditional expectation which, for the first-order loop, is readily done and yields the exact known result. ... View full abstract»

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  • Digital Transmission Capabilities of a Transportable Troposcatter System

    Publication Year: 1967, Page(s):421 - 433
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1373 KB)

    The digital transmission performance of a transportable troposcatter station is evaluated as a function of path length. Equipment parameters are chosen to be representative of a compact full-scale terminal capable of serving a major switching facility. While error rate evaluations for troposcatter transmission have been made previously, they have generally corresponded to the conditions of specifi... View full abstract»

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  • The Lunar Orbiter Telecommunications Systems

    Publication Year: 1967, Page(s):433 - 443
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1427 KB)

    The Lunar Orbiter is an unmanned lunar reconnaissance satellite which takes high-resolution photographs of large areas of the lunar surface to assist in selecting a landing site for Apollo. Because of various mission aspects and the fact that the Orbiter employs a film-type camera, the requirements placed on the telecommunications system are different from those of previous U. S. spacecraft. This ... View full abstract»

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  • Correction to "Character error probabilities for M-ary signaling in impulse noise environments"

    Publication Year: 1967, Page(s): 443
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (122 KB)

    Summary form only given. R.E. Ziemer, author of the above paper (19TP 67-904), which appeared on pp. 32-44 of the February, 1967, issue of this Transactions, has requested that the following corrections be made. The integral appearing in (31) should have a minus sign in the exponent of the integrand. Under the section entitled Results, p. 40, the seventh line of the first column is amended. Equati... View full abstract»

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  • A New Data-Gathering and Control System

    Publication Year: 1967, Page(s):444 - 449
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (747 KB)

    The Automatic Electric C-2000 Data-Gathering and Control System represents recent innovations in the field of industrial control. The system consists of a master station complex located at the hub of a communication network, linking it to a number of remote stations. An unusually efficient communication message structure is employed which, when used in conjunction with a high-speed data set, resul... View full abstract»

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  • Carrier Transmission on Voice Loaded Loops

    Publication Year: 1967, Page(s):450 - 455
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (626 KB)

    A new telephone line loading scheme is reported that permits application of subscriber carrier systems to voice loaded cable pairs with practically no degradation to either voice or carrier transmission. This scheme, termed super-loading, makes use of a bifilar wound toroidal inductor having both windings center tapped, with an LC network joining the center taps. This arrangement produces a device... View full abstract»

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  • Transistorized Line Equipment of V 2700 Carrier System

    Publication Year: 1967, Page(s):456 - 462
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (825 KB)

    A transistorized system has been developed for transmitting 2700 voice channels, or 1200 voice channels simultaneously with a TV program. It has the same repeater spacings and the same low noise power as hitherto supplied systems with tube amplifiers. Outstanding details are the underground line amplifiers, the combination of temperature compensation and automatic pilot control of level stabilizat... View full abstract»

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  • Improvements in the Design of Retransmission Systems

    Publication Year: 1967, Page(s):463 - 465
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (295 KB)

    Two improvements in the design of retransmission (ARQ) systems are described which lead to simpler implementation and improved performance. One change simplifies the procedure for handling erroneous messages and repeat-request-bearing messages; the other simplifies the procedure for requesting retransmissions. The consequences of these modifications and the results of a comparative analysis with p... View full abstract»

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Aims & Scope

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

Full Aims & Scope