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Communication Technology, IEEE Transactions on

Issue 1 • Date February 1967

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

    Publication Year: 1967 , Page(s): 0
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    Freely Available from IEEE
  • Subscriber dialing for international traffic in Europe

    Publication Year: 1967 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (551 KB)  

    As tourism, traffic, and the economy weld Western Europe more closely together, international telephone traffic has been increasing at a steady rate. Twenty-six administrations or operating agencies in 17 countries maintain a telephone network in which almost every technical concept has found application. This paper points up the differences between the various European systems, especially in the ... View full abstract»

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  • Problems of programming for shared real-time systems

    Publication Year: 1967 , Page(s): 5 - 10
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (738 KB)  

    Programming for shared real-time systems presents problems not normally encountered in conventional computer applications. Interaction among programs of various interrupt levels must be controlled, effects of hardware and software errors must be localized, and processing handling capacity must be maximized through proper task scheduling. The methods used for handling such problems in the Bell Syst... View full abstract»

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  • The Anatomy of Waiting Time Distributions in Single Server Systems

    Publication Year: 1967 , Page(s): 11 - 17
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (600 KB)  

    A general representation of waiting time distributions in a single server system is developed from elementary probability considerations. Some of the classical delay distributions are then derived from this result, after suitable assumptions have been made. View full abstract»

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  • Analysis of Digital Communications Systems Using Binary Error Correcting Codes

    Publication Year: 1967 , Page(s): 17 - 22
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (589 KB)  

    A set of equations is derived which permits the calculation of the figure of merit for a communications channel in which a binary error correcting code is used in conjunction with correlation decoding at the receiver. The figure of merit is expressed in terms of the required probability of error and the parameters of the code. These equations are then used to determine the figure of merit for a nu... View full abstract»

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  • Failure--Correction Decoding

    Publication Year: 1967 , Page(s): 23 - 31
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (887 KB)  

    Failure-correction decoding (FCD) is a decoding method that improves the performance of error-correction block codes by using reliability estimates of the received digit decisions. The FCD logic produces F failures by erasing the F digits of a received code character that are most probably in error. Since the number View full abstract»

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  • Character Error Probabilities for M-ary Signaling in Impulsive Noise Environments

    Publication Year: 1967 , Page(s): 32 - 44
    Cited by:  Papers (23)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1291 KB)  

    This paper is concerned with the calculation of the probability of character error and comparison of coherent, m -ary, digital communication systems operating in impulsive noise environments. The receiver is assumed to be a maximum likelihood detector for white, Gaussian interference and therefore has the form of a parallel bank of matched filters followed by ... View full abstract»

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  • Normal Approximations to the Error Rate for Hard-Limited Correlators

    Publication Year: 1967 , Page(s): 44 - 51
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (771 KB)  

    The approximation to tile normal law of the error transition probability for a correlation receiver preceded by a wideband hard limiter is reviewed. As is well known, the correlator output is asymptotically normal. This circumstance, however, is in general no justification for computing an error probability with the use of the complimentary error function. A binary message alphabet is assumed and ... View full abstract»

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  • The Divergence and Bhattacharyya Distance Measures in Signal Selection

    Publication Year: 1967 , Page(s): 52 - 60
    Cited by:  Papers (392)  |  Patents (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (932 KB)  

    Minimization of the error probability to determine optimum signals is often difficult to carry out. Consequently, several suboptimum performance measures that are easier than the error probability to evaluate and manipulate have been studied. In this partly tutorial paper, we compare the properties of an often used measure, the divergence, with a new measure that we have called the Bhattacharyya d... View full abstract»

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  • On the Detection of Transiting Broadband Targets in Noise of Uncertain Level

    Publication Year: 1967 , Page(s): 61 - 69
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (842 KB)  

    The fact that the signal received from a transiting object first rises and then falls in intensity can be used to detect the presence of such an object even though the signal emitted by the object and the background noise are otherwise indistinguishable. If the strength of the background noise is not known, detectability is reduced by the uncertainty in the noise level; however, means can be incor... View full abstract»

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  • Digital Communications on a Pseudonoise Tracking Link Using Sequence Inversion Modulation

    Publication Year: 1967 , Page(s): 69 - 78
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (932 KB)  

    The factors which enter into digital communication over a pseudonoise tracking link are developed. The deterioration of tracking quality due to simultaneous use of the tracking link for communication is shown to be small. The communication bit error probability is shown to be the same as that for coherent phase shift keying of a sine wave carrier when the tracking link uses biphase carrier modulat... View full abstract»

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  • Evaluation of a Gaussian HF Channel Model

    Publication Year: 1967 , Page(s): 79 - 88
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (953 KB)  

    The modeling of an HF communication channel as a randomly time-varying linear filter has proved useful in the analysis of data transmission systems and in the study of ionospheric phenomena causing dispersive effects. Such a model may be evaluated by comparing properties determined experimentally with those based on the hypothesized model. By assuming that the channel output is a zero-mean Gaussia... View full abstract»

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  • Selecting Optimum Sampling and Quantization Intervals for Detecting Impulse Waveforms

    Publication Year: 1967 , Page(s): 89 - 95
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (615 KB)  

    The combined use of time-domain waveforms, detection probability, and false-alarm probability as criteria for selecting a sample period and quantization interval which minimizes bit rate is illustrated. This is contrasted with the frequencydomain concepts and mean-square error criteria usually employed in telemetry to choose sample period and quantization interval. The method is applied to a sampl... View full abstract»

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  • Telemetry and Process Control Computer Application in Natural Gas Dispatching

    Publication Year: 1967 , Page(s): 96 - 102
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (708 KB)  

    This paper describes how a natural gas transmission company improves operating efficiency and further increases its sales by the use of a process control computer, connected on-line to an existing telemetry system. The telemetry and instrumentation which is necessary for the on-line computer was installed as part of an overall automation program. Descriptions of the telemetry and instrumentation a... View full abstract»

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  • Statistical Control of Trunk Transmission Quality Utilizing Computer Techniques

    Publication Year: 1967 , Page(s): 102 - 107
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (493 KB)  

    This paper discusses the means whereby the distribution grade and bias ratings of trunk circuits can be determined by trunk group, central office, division, area, and finally the entire company through use of a digital computer. The original data can be acquired manually or by means of an automatic trunk routiner which provides readout. Several aspects as to how the final results can be used by va... View full abstract»

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  • Compatible 300 and 960-Channel Line Equipment for Small Diameter Coaxial Cable

    Publication Year: 1967 , Page(s): 108 - 119
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1522 KB)  

    The transistorizing of buried dependent repeaters permits economical dc power feeding over long distances. With small diameter cables, the total cost of the system will be a minimum. By burying repeaters, it is possible to control the gain by ambient temperature. In spite of the compensation, a small residual equalization error cannot be avoided. Therefore, some pilot-regulated repeaters are provi... View full abstract»

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  • Time Division Conferencing of Four-Wire Telephone Circuits

    Publication Year: 1967 , Page(s): 120 - 123
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (376 KB)  

    This paper describes a system which can conference up to several hundred 4-wire telephone circuits with sufficient return loss to prevent objectionable far-end echo effects. The causes and problems of echo in such connections are discussed, as well as the advantages and limitations of other methods used for correcting this situation. The method described uses a time-division echo treatment scheme ... View full abstract»

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  • Wideband Video Data Transmission

    Publication Year: 1967 , Page(s): 124 - 129
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    Communication networks with fixed bandwidth and power allow digital systems to transmit more information per unit time than analog systems. Addressing and channel noise limit the performance of compressed digital systems over the constrained link. View full abstract»

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  • Correction [to "Reliability of microwave radio relay systems"]

    Publication Year: 1967 , Page(s): 129
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    Summary form only given, as follows. L.G. Abraham, late author of paper 19TP66-1103, entitled "Reliability of Microwave Radio Relay Systems," which appeared on pp. 805-823 of the December, 1966, issue of these Transactions, requested that the following corrections be made. Under the section Sources of Outages, p. 808, second paragraph, the four main ways in which propagation outages might occur sh... View full abstract»

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  • The Distribution for Traffic in a Nonblocking Random Access Discrete Address Communication System

    Publication Year: 1967 , Page(s): 130 - 131
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (214 KB)  

    In a random access communication system, the number of calls in progress at any instant of time is a random variable. For centralized systems with blocking, such as the switched telephone system, the assumption of a binomial distribution for this variate is often valid. For a decentralized, nonblocking discrete address system, in which a channel between any two idle parties always exists, it is no... View full abstract»

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  • Direct Editing of Research Data by Application of Computer Display Techniques

    Publication Year: 1967 , Page(s): 131 - 134
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (493 KB)  

    Data recording in a research environment often results in the recording of much redundant data due to the unpredictable nature of most experiments. Data measuring instruments often malfunction, making their data invalid. Data processing efficiency can be increased if the experimental engineer can make judgments at editing time which control the processing and eliminate much of the redundant data a... View full abstract»

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  • Comments on "Binary Error Rates in Fading FDM-FM Communications"

    Publication Year: 1967 , Page(s): 134 - 135
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    It is claimed that several errors exist in the referenced paper, and that recent design practices differ from those recommended earlier. The author of the original paper, which appeared in IRE Trans. on Communications Systems, vol. CS-9, pp. 206-214, September 1961, replies. View full abstract»

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  • [Back cover]

    Publication Year: 1967 , 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