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IEEE Transactions on Communication Technology

Issue 3 • Date September 1965

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Displaying Results 1 - 23 of 23
  • [Front cover and table of contents]

    Publication Year: 1965, Page(s): 0
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  • Digital Transmission over Submarine Cables

    Publication Year: 1965, Page(s):249 - 257
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (830 KB)

    The problems of transoceanic transmission of large volumes of information have been raised increasingly over the past few years. Lately, the need for transoceanic digital communications has been of interest. This paper discusses the significance of these trends and examines the technical prospects for handling large volumes of digital traffic using submarine cables. Concentrating on transatlantic ... View full abstract»

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  • Analysis of Mixtures of Wide- and Narrow-Band Traffic

    Publication Year: 1965, Page(s):258 - 266
    Cited by:  Papers (33)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    The traffic aspects of two communications systems are considered. The first case uses a single wide-band facility to simultaneously carry traffic of different bandwidths (for example, a super group to carry single trunk calls and calls requiring a channel group). Both types of callers have full access to the facility, but in order to equalize their grades-of-service the wide-band traffic may be gi... View full abstract»

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  • Error Probabilities Due to Atmospheric Noise and Flat Fading in HF Ionospheric Communication Systems

    Publication Year: 1965, Page(s):266 - 279
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1205 KB)

    Atmospheric noise and fading are major sources of error in the transmission of digital data via ionospheric reflection. Using appropriate mathematical models of the fading and atmospheric noise, this paper derives analytical expressions for the binary error rate of FSK and PSK systems. It is demonstrated that the error rate depends on the atmospheric noise in the various diversity receivers only t... View full abstract»

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  • The Effect of Atmospheric Noise on the Probability of Error for an NCFSK System

    Publication Year: 1965, Page(s):280 - 284
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (466 KB)

    A noncoherent frequency-shift-keying (NCFSK) modulation system is considered. The binary element error probability is computed when the additive noise is atmospheric (using empirical curves) and the fading obeys a gamma distribution. The fading is assumed to be flat over the frequency band occupied and slow in comparison to the baud rate. Curves displaying the probability of an element error as a ... View full abstract»

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  • Some Techniques for the Instantaneous Real-Time Measurement of Multipath and Doppler Spread

    Publication Year: 1965, Page(s):285 - 292
    Cited by:  Papers (34)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The design optimization of digital communication systems using selectively fading transmission media such as HF and troposcatter requires knowledge of the selective fading characteristics of the media. A minimal characterization is provided by the gross channel parameters of multipath spread and Doppler spread. This paper presents several techniques which will allow the simultaneous measurement of... View full abstract»

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  • A Transmitted Reference System for Communication in Random of Unknown Channels

    Publication Year: 1965, Page(s):293 - 301
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (817 KB)

    When communicating through an unknown or random channel, it often becomes advisable to utilize some of the transmitted energy to allow the receiver to measure certain channel parameters. In this paper, a set of transmitted signals are chosen of the form {x_{m}^{(i)}(t), x_{r}(t)}, t\epsilon(0,T) , where i = 1, 2,...,l ... View full abstract»

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  • Applications of Topological Methods to Probabilistic Communication Networks

    Publication Year: 1965, Page(s):301 - 307
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    The reliability of a probabilistic communication network is considered. A probabilistic communication network is a network in which each branch is given a probability that the specific branch can perform its purpose successfully. This probability is called the reliability of this branch. The idea of the overall reliability of the simultaneous communication among all (or part of) the stations of a ... View full abstract»

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  • High-Speed Teleprinter System

    Publication Year: 1965, Page(s):307 - 311
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    A novel printing method is used in a high-speed, fully electronic teleprinter system which is able to transmit, receive, and print-out telegraph and data messages at a maximum speed of 225 characters per second or 1800 bauds, i.e., 20 to 30 times faster than in ordinary teleprinters in use today. The system consists of 1) a photoelectric reader for punched tape and an electronic transmitter, 2) an... View full abstract»

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  • An Analysis of the Capabilities of Polybinary Data Transmission

    Publication Year: 1965, Page(s):312 - 319
    Cited by:  Papers (9)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (783 KB)

    The capabilities of the polybinary technique for transmission of digital data in absolutely band-limited channels are evaluated by analysis and experiment. Relative bit rates and probabilities of error per bit are used to compare the various polybinary systems with each other and with the more conventional multilevel techniques of data transmission. It is concluded that duobinary transmission can ... View full abstract»

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  • Selectrive Fading Limitations of the Kathryn Modem and Some System Design Considerations

    Publication Year: 1965, Page(s):320 - 333
    Cited by:  Papers (25)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1245 KB)

    Digital data communication in the HF band is influenced adversely by multipath and Doppler smear which cause frequency-selective and time-selective fading, respectively. As a result of the selective fading, an increase in signal-to-noise ratio brings in diminishing returns as far as reduction in error probability is concerned. Careful attention to system design is necessary in an HF modem if its p... View full abstract»

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  • Communications Handover for Medium Altitude Satellite Systems

    Publication Year: 1965, Page(s):334 - 340
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (719 KB)

    This paper discusses the problems and solutions of communications handover in a medium altitude multisatellite system. Various methods of handover are presented together with a description of the geometric boundaries of the basic problem. The effect of variable path delay on voice, teletype, and data transmissions is discussed. The paper then proceeds to formulate the specific design of an instant... View full abstract»

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  • Transmission Design Objectives for Switched Services Networks

    Publication Year: 1965, Page(s):341 - 354
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1255 KB)

    The switched services network (SSN) is a new private line telephone service to provide customer dialed connections between PBX's at widely separated and scattered locations. This service differs from the presently used tandem tie line switching in that the network switching will be accomplished by 4-wire and 2-wire common control switching machines strategically located in telephone central office... View full abstract»

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  • The N3 Carrier System: Transmission Aspects and Objectives

    Publication Year: 1965, Page(s):355 - 361
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The N3 carrier system is a compandored 24-channel, single sideband system utilizing N -repeatered lines of existing design. This paper includes a general description of the system organization, a discussion of system features, and gives expected performance values as well as objectives of some significant system transmission parameters. Features of special inte... View full abstract»

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  • Equipment Aspects of the Packaged N3 Carrier Terminal

    Publication Year: 1965, Page(s):361 - 366
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (938 KB)

    The packaged N3 carrier terminal is the latest Bell System addition to its short-haul carrier family. Recent technological advances were used to advantage to produce a system possessed of refinements which were heretofore unavailable. This paper describes the packaged N3 carrier terminal and the plug-in units which comprise the carrier portion of the terminal. The packaging philosophy and the adva... View full abstract»

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  • A New Class of Selected Ternary Pulse Transmission Plans for Digital Transmission Lines

    Publication Year: 1965, Page(s):366 - 372
    Cited by:  Papers (24)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    Digital transmission lines consisting of cable media and regularly spaced self-timed reconstructive repeaters are being considered for the transmission of binary digital information, such as arbitrary combinations of digitized speech, television, and data. For transmission over the line, the binary information is coded into a sequence of symbols. The transmission code is referred to as the pulse t... View full abstract»

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  • Square-law detector performance in an impulsive noise background

    Publication Year: 1965, Page(s):373 - 374
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (238 KB)

    The purpose of this correspondence is to report on some nxasurements of output SNR (signal-to-noise ratio or S/N), characteristics for a square-law detector extracting signals from non-Gaussian noise, specifically, impulsive noise. Non-Garlssian noise arises in varioas communication media such as the atmosphere, wire lines, and under water. In experimental and theoretical investigations of the eff... View full abstract»

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  • Comments on "Generalized Cost Expression for Private-Line Communications Channels"

    Publication Year: 1965, Page(s):374 - 377
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB)

    Because of recent changes in tarifs, many of the costs given in the much needed and informative subject correspondence by G.A. Barnard named above (ibid., vol. COM-12, pp. 228-230, December 1964) are not those now in effect. Moreover, some of the costs given there were computed incorrectly or from inapplicable tariffs. Rates currently charged are given here in Table I. Costs of both a 250-mile and... View full abstract»

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  • Some effects of a random channel on transmitted reference signals

    Publication Year: 1965, Page(s):377 - 379
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (269 KB)

    The objective of this note is to determine, for several example channels, how much the correspondence between reference and modulated carriers is degraded by an arbitrary offset in time-frequency (TF) space. The amount of this time-frequency offset is shown to determine the effective signal energy of the transmitted signals. View full abstract»

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  • Correction to "Experiments in 'SSB FM' Communication Systems"

    Publication Year: 1965, Page(s): 379
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    There is an error in the above-named paper (ibid., vol. COM-13, pp. 109-116, March 1965). Figure 15 was printed over its own caption and also over the caption for Fig. 16. Figure 16 was not printed at all. The correct figures and their captions are shown. View full abstract»

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  • On survivability of networks [Author reply to Deo's comments on "On distributed communications networks," By P. Baran]

    Publication Year: 1965, Page(s):379 - 380
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (245 KB)

    Narsingh Deo's comments suggests an alternative metric of survivability (pairs of stations in communications) to the one Paul Baran, the original author, chose to use in a recent paper on survivable communications (number of stations in communications with all, see ibid., vol. CS-12. pp. 1-9, March 1964). Deo's point (ibid., vol. COM-12, pp. 227-228, December 1964) is well stated and the original ... View full abstract»

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  • Automatic equalization using transversal equalizers

    Publication Year: 1965, Page(s): 380
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (146 KB)

    Some interesting articles on automatic, transversal equalization, have appeared in recent months. This subject is considered highly important. One purpose of this correspondence is to point out some earlier, less widely circulated reports that discuss this subject in considerable detail and explain some additional, important considerations. View full abstract»

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  • Contributors

    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