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IEEE Transactions on Communication Technology

Issue 4 • Date August 1968

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Displaying Results 1 - 20 of 20
  • [Front cover and table of contents]

    Publication Year: 1968, Page(s): 0
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    Freely Available from IEEE
  • Resonant Transfer Between Filters of Uequal Bandwidth and Its Applications

    Publication Year: 1968, Page(s):501 - 512
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1226 KB)

    The resonant transfer process is extended to include greater generality. This leads to certain new applications. Baseband-to-baseband resonant transfer transmission has been used for a number of years in the area of time division switching. In addition, recently the more general concept of single-sideband-tosingle-sideband transmission, which would include the baseband-tobaseband case, has been us... View full abstract»

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  • Economic Considerations for Communication Systems

    Publication Year: 1968, Page(s):513 - 525
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1030 KB)

    Developments in communications techniques and equipment provide the user with a wide choice of means and systems to obtain the desired quantity and quality of service. At the same time, increasing requirements for communications and the need for transmitting different kinds of information with higher speeds and reliability, a high degree of invulnerability and increased capacity have increased the... View full abstract»

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  • Error Performance of Quadrature Pilot Tone Phase-Shift Keying

    Publication Year: 1968, Page(s):526 - 529
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (405 KB)

    In this paper we exhibit the effect of the data sequence on the reconstruction of the reference (pilot) tone for a quadrature phase-shift keying (Q-PSK) system. This is a binary digital transmission system in which the phase of one quadrature component of the carrier tone is keyed, while the phase of the other component is unkeyed. The integration of several previous keying intervals provides a re... View full abstract»

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  • A Theoretical Study of Performance of an Orthogonal Multiplexing Data Transmission Scheme

    Publication Year: 1968, Page(s):529 - 540
    Cited by:  Papers (145)  |  Patents (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (997 KB)

    This paper presents a theoretical analysis of the performance of an orthogonal multiplexing data transmission scheme (parallel transmission scheme) subject to a number of degrading factors normally encountered by a practical operating system. The factors considered jointly are sampling time error, carrier phase offset, and nonideal phase characteristics of transmitting and receiving filters. Perfo... View full abstract»

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  • Subcarrier Tracking Methods and Communication System Design

    Publication Year: 1968, Page(s):541 - 550
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (873 KB)

    It is advantageous from power considerations to allow suppressed-carrier coherently-detected communications. Two methods for generating a coherent reference for the demodulation of a suppressed-carrier signal, namely, the squaring loop and the mathematically equivalent Costas loop, are analyzed, including at some points the effects of VCO noise and initial frequency detuning. The steady-state phas... View full abstract»

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  • Response of an FM Discriminator to a Digital FM Signal in Randomly Fading Channels

    Publication Year: 1968, Page(s):551 - 560
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    The calculation of the error rate resulting from the detection of a binary FSK signal using an FM discriminator-lowpass filter detector is described for an FM signal undergoing nonselective fading in additive Gaussian noise. The results extend the error rate calculations of Schilling et al. [1], [2] which were performed for a nonfading channel. While the technique employed is quite general, exampl... View full abstract»

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  • Bounds on the Spectra of Angle-Modulated Waves

    Publication Year: 1968, Page(s):561 - 566
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (441 KB)

    The quantitative evaluation of the spectrum of anglemodulated waves is considered. Bounds are obtained by exploiting the similarity of a spectrum to a probability density and by making use of the known bounds on the tails of probability distributions. This approach applies to cases of modulation by Gaussian processes and some non-Gaussian processes. For a Gaussian modulation, a method is presented... View full abstract»

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  • Error Distribution and Diversity Performance of a Frequency-Differential PSK HF Modem

    Publication Year: 1968, Page(s):567 - 575
    Cited by:  Papers (12)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (761 KB)

    A 4800-bit/s digital data modem is operated over a simulated HF channel to determine the bit-error rate and error distributions of the received serial binary data stream. The measured error distributions for multipath-limited conditions are compared with back-to-back operation and theoretically determined random distributions, and are also used to evaluate forward acting error correction assuming ... View full abstract»

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  • Message Errors and Message-Channel Signal-to-Noise Ratios

    Publication Year: 1968, Page(s):576 - 581
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (630 KB)

    Basic statistical characteristics of the message-signal channel output signal-to-noise ratio (SNR) are discussed and measured. An explanation and experimental proof are given for the lack of close correlation between the measured median output SNR and the measured average bit-error rate. Also, it is shown that a much higher correlation exists between the fade-level distribution of the output SNR a... View full abstract»

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  • A Satellite Time-Division Multiple-Access Experiment

    Publication Year: 1968, Page(s):581 - 588
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (833 KB)

    An important inherent advantage of communications via satellite is that large numbers of earth stations, separated by long distances, can communicate with each other simultaneously. Thus a satellite provides a multiple-access capability by nature of its physical location. Earth stations can be multiplexed at the satellite by means of a variety of techniques. One technique is to use time-division m... View full abstract»

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  • Design of a Satellite Time-Division Multiple-Access Burst Synchronizer

    Publication Year: 1968, Page(s):589 - 596
    Cited by:  Papers (11)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (710 KB)

    The design, development, and testing of a burst synchronizer suitable for use in satellite time-division multipleaccess (TDMA) communication systems have been completed. It has been shown that submicrosecond guard times between bursts transmitted from different earth stations are practicable using state-of-the-art techniques. This paper presents theoretical analyses, descriptions of operation, and... View full abstract»

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  • Unique Word Detection in Digital Burst Communications

    Publication Year: 1968, Page(s):597 - 605
    Cited by:  Papers (22)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (759 KB)

    In a satellite time-division multiple-access (TDMA) system, the information is transmitted in bursts from the participating ground stations. In order to establish a time reference in each burst and to determine its origin, special code patterns called unique words (UW) are contained in the bursts. Reliable detection of the UW is the basis for keeping the stations in synchronism and providing high-... View full abstract»

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  • Buffer Design for Data Compression Systems

    Publication Year: 1968, Page(s):606 - 615
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (793 KB)

    Design of the output buffer is one of the most important tasks in implementing an adaptive data compression system. Upon proper design of the buffer including such parameters as size, inputoutput data rates, and occupancy control, rests the overall compression efficiency and error performance of the system. The binomial distribution is used to derive an exact model for a synchronous buffer. The Po... View full abstract»

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  • Echo Suppressor Design Considerations

    Publication Year: 1968, Page(s):616 - 624
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    The growth of telephone circuits with long propagation times, particularly those using synchronous satellite facilities, has renewed interest in the design of echo suppressors. The increase in delay intensifies potential degradations associated with the use of echo suppressors and demands echo suppressor performance far superior to that of older designs. Several organizations, including the Bell S... View full abstract»

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  • An Integrated RC Oscillator for TOUCH-TONE® Dialing

    Publication Year: 1968, Page(s):624 - 629
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (785 KB)

    A multiple frequency RC oscillator for use in TOUCHTONE® telephones has been made using tantalum films and beam lead silicon devices. The integrated design, equivalent to over 50 discrete components, requires a volume of about four hundredths of a cubic inch. All eight frequencies of the tone generator are initially tuned to 0.1 percent. View full abstract»

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  • Communication at Low Data Rates - Oscillator Models and Corresponding Optimal Receivers

    Publication Year: 1968, Page(s):629 - 631
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    For virtually any model of an unstable oscillator, at low signal-to-noise ratios, the maximum-likelihood ratio receiver is asymptotically quadratic. A quadratic receiver roughly corresponds to a weighted spectral analysis of the received signal. Two major models of unstable oscillators which seem reasonable for low data rate communication using orthogonal signals are considered. The first assumes ... View full abstract»

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  • Experimental Verification of Laser Communication System Design Equations

    Publication Year: 1968, Page(s):631 - 632
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    Theoretically predicted performance is compared with experimental data for received signal power and background noise power for daylight operation of an injection laser communication system. View full abstract»

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  • Comments on "An Approximate Analysis of a Periodically Switched Filter"

    Publication Year: 1968, Page(s): 632
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (102 KB)

    It is noted that the Spence function used in approximating the pulse transfer function has been tabulated by Ashour and Sabri. View full abstract»

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  • [Back cover]

    Publication Year: 1968, 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