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IEEE Transactions on Communication Technology

Issue 4 • Date August 1966

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Displaying Results 1 - 25 of 27
  • [Front cover and table of contents]

    Publication Year: 1966, Page(s): 0
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    Freely Available from IEEE
  • Performance of a Multiple Address RADA System

    Publication Year: 1966, Page(s):369 - 372
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (341 KB)

    Potentialities and limitations are derived for a random access, discrete address (RADA) communication system in which addresses consist of time-frequency coded pulses and in which a higher order alphabet is realized by assigning many different addresses per person. The performance of such a multiple address RADA system is derived as a function of two parameters: the channel utilization and the siz... View full abstract»

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  • Further Analysis of an Integrated Switching and Multiplexing (ISAM) System

    Publication Year: 1966, Page(s):373 - 381
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (927 KB)

    This paper is an extension of earlier analysis work relating to a new method of achieving frequency division multiplexing, capable of being effectively integrated with time division switching. The band shifting inherent in frequency division multiplexing and demultiplexing is achieved by placing a sampling gate between a baseband and a sideband filter. When this technique is combined with time div... View full abstract»

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  • A Statistical Analysis of Telephone Circuit Error Data

    Publication Year: 1966, Page(s):382 - 389
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Berger and Mandelbrot in 1963 proposed a particular renewal process as a model for the occurrence of errors in data transmitted over telephone circuits. Besides the assumed independence between the successive intervals between errors, they assume that the intervals have a Pareto distribution. Their graphical analyses of large amounts of data indicated departures from the model which Mandelbrot pro... View full abstract»

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  • Communication nets in random behavior

    Publication Year: 1966, Page(s):389 - 399
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (935 KB)

    Concepts of random neural nets, as treated in mathematical biophysics, are used to describe the random behavior of communication nets. Application of the steady-state as well as message spread threshold concepts to communication nets are considered. The steady state here implies a systematic and regular spread of the message while the spread threshold, referred to as the "ignition" threshold in ne... View full abstract»

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  • Binary Error Probabilities Over Selectively Fading Channels Containing Specular Components

    Publication Year: 1966, Page(s):400 - 406
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (591 KB)

    This paper derives a general expression for error probabilities in binary transmission of signals over selectively fading diversity channels, containing specular and scatter type components. Post detection diversity combining is employed at the receiver, and a general form of detector that includes the usual coherent and incoherent detectors is assumed as a special case. Recent results of other au... View full abstract»

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  • Response of an AGC Amplifier to Two Narrow-Band Input Signals

    Publication Year: 1966, Page(s):407 - 417
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (702 KB)

    The response of an automatic gain control (AGC) amplifier to two narrow-band input signals is analyzed with respect to weak signal suppression and cross-product generation. A linear control characteristic is assumed. Results are obtained for a wide range of relative input-signal levels and frequency spacings. It is shown that the weak signal suppression and cross-product generation decrease, with ... View full abstract»

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  • Optimal Design of One-Way and Two-Way Coherent Communication Links

    Publication Year: 1966, Page(s):418 - 431
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1212 KB)

    This paper is concerned with the optimal design of one-way and two-way communication systems which are of greatest interest in space applications. A two-way communication system is defined to be one composed of two radio links or channels, viz., an up-link channel and a down-link channel. The down-link RF carrier is derived from the carrier tracking loop located in the uplink receiver. Transmissio... View full abstract»

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  • Design and Analysis of a Linear Phase-Locked Loop of Wide Dynamic Range

    Publication Year: 1966, Page(s):432 - 440
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (871 KB)

    Consideration is given to a phase-locked loop configuration which provides a linear control characteristic over a range of 2π radians. Loop configurations employing pulse-amplitude-modulation (PAM) and pulse-duration-modulation (PDM) sawtooth phase comparators are outlined. The performance of the loop in a noise-free environment is determined for the case where the loop filter is of the perfe... View full abstract»

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  • Distortion of FM Signals Caused by Channel Phase Nonlinearity and Amplitude Fluctuation

    Publication Year: 1966, Page(s):440 - 448
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    The distortion of FM (frequency-modulated) signals after being processed through time-invariant channels with nonlinear phase characteristic and/or fluctuating amplitude function is considered, starting from a Fourier spectral analysis of the signal. Expressions for calculating the distortion power or harmonic amplitudes, applicable to both single-tone and multitone message signals, are derived in... View full abstract»

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  • FM 120/5000 Radio Link System

    Publication Year: 1966, Page(s):449 - 455
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    A radio communication system, primarily suited for military application, is described, general design objectives are outlined, and some features, such as rapid standby switching arrangement, are discussed in detail. View full abstract»

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  • Microwave Receiver Interference Characteristic Measurements

    Publication Year: 1966, Page(s):455 - 469
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1460 KB)

    Interference measurements on a 6-Gc/s microwave receiver at RF frequencies for 600- and 960-channel loading are described. The receiver used a 70-Mc/s IF amplifier with a 25Mc/s bandwidth. The mechanism for creating interference at RF frequencies is presented and is verified by many figures that relate the interfering signal level at several baseband frequencies to the magnitude and relative frequ... View full abstract»

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  • Transient Response of Narrow-Band Networks to Narrow-Band Signals with Applications to Frequency Shift Keying

    Publication Year: 1966, Page(s):470 - 477
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (685 KB)

    A method is presented for simplifying the calculation of transient response of narrow-band networks to narrow-band signals. Laplace transforms are used, but employ only positive frequencies, simplified by approximations justified by the narrowband properties of the networks and signals. The method is applied in calculating the transient response of 1- and 2-pole band-pass filters to a step change ... View full abstract»

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  • Negative Resistance Devices Using A Multiple Number of Tunnel Diodes or Varactors

    Publication Year: 1966, Page(s):478 - 483
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (589 KB)

    The critical need for simple high-gain, low-noise microwave amplifiers and frequency converters, required for space communication and improved ground communication systems, appears to be met by the solid-state tunnel diode and varactor devices. The incorporation of these low-noise negative resistance devices results in significant improvement in the performance of communication systems where sensi... View full abstract»

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  • Measurement of Polarization Statistics of Signals Received Over a Short Range HF Path

    Publication Year: 1966, Page(s):484 - 494
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1463 KB)

    A study was performed to measure variations in the polarization characteristics of an HF signal received over a short range ionospheric path. This paper describes a limited number of experiments using signals from Station WWV to determine the statistical nature of the polarization ellipse at the receiving site, Hathaway Hill, near Rochester, N. Y. The approach employed was to regard the elliptical... View full abstract»

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  • Laboratory Simulation of Multipath Propagation Effects on FM Systems

    Publication Year: 1966, Page(s):495 - 498
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (473 KB)

    A laboratory multipath simulator was developed to provide a controlled environment for the study of the nature of long delay multipath propagation interference effects on low-channel capacity FM systems, and for the evaluation of design changes on an existing system to improve its tolerance to a multipath environment. The associated laboratory program provided a valuable collection of information ... View full abstract»

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  • A Rake System for Tropospheric Scatter

    Publication Year: 1966, Page(s):499 - 506
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (749 KB)

    Experimental equipment has been developed which adapts the Rake concept to tropospheric scatter. This equipment enables experimental tests of multipath diversity effectiveness for communications. Its delay-resolution capabilities and circuit stability also allow effective use of the equipment for novel propagation research. The underlying concepts and equipment design are described, along with ini... View full abstract»

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  • The Early Bird Project

    Publication Year: 1966, Page(s):507 - 511
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (623 KB)

    The Early Bird communications satellite is a commercial venture owned by a consortium of 52 countries. The system uses one spin stabilized synchronous satellite and five earth stations to provide a full-time microwave link between North America and Europe for 240 telephone circuits or for television. The 85-pound spacecraft was launched from Cape Kennedy on April 6, 1965, by NASA, using Thrust Aug... View full abstract»

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  • CATV Amplifiers: Figure of Merit and the Coefficient System

    Publication Year: 1966, Page(s):512 - 520
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    A coefficient system has been devised which makes use of transmission objectives and amplifier performance to provide a new method of optimizing CATV system design. Maximum system length, in number of tandem amplifiers, is given for a reference amplifier. This number is called the system coefficient. Each other amplifier, either line or distribution, is assigned an amplifier coefficient which show... View full abstract»

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  • The 1963 Survey of Impulse Noise on Bell System Carrier Facilities

    Publication Year: 1966, Page(s):520 - 525
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (585 KB)

    An outstanding characteristic of impulse noise on telecommunication channels is its high variability. A scientifically designed sampling plan was incorporated to conduct a survey of this type of noise on major Bell System carrier facilities. The results show mean impulse noise levels to range from 51 to 66 dBrn, and standard deviation of the nearly normal cumulative distribution functions of the l... View full abstract»

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  • Corrections [to "Error probabilities due to atmospheric noise and flat fading in HF ionospheric communications"]

    Publication Year: 1966, Page(s): 525
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (98 KB)

    The author of the paper "Error Probabilities Due to Atmospheric Noise and Flat Fading in HF Ionospheric Communications," which appeared on pp. 266-279 of the September, 1965, issue of these Transactions, reports corrections to Equation (123). View full abstract»

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  • Corrections [to "On signal-to-noise ratios in communication systems"]

    Publication Year: 1966, Page(s): 525
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (98 KB)

    The author of the correspondence item "On Signal-to-Noise Ratios in Communication Systems," which appeared on pp, 71-72 of the February, 1966, issue of these Transactions, reports corrections to equations (3) and (4). View full abstract»

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  • Some Properties of the Two-State First-Order Markov Chain

    Publication Year: 1966, Page(s):526 - 529
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB)

    This paper gives analytical derivations and graphical illustrations of the association factor, the stationary proportion of ONE'S, the symbol entropy, and the autocomparison function, as functions of the transition probabilities, for the 2-state first-order Markov chain. These properties of the chain have been found useful in the solution of certain practical problems in the field of information t... View full abstract»

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  • Plurality-Count Diversity Combining for Fading M-ary Transmissions

    Publication Year: 1966, Page(s):529 - 532
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (411 KB)

    The performance of a plurality-count diversity combiner for fading M -ary transmissions is analyzed, and calculated error probabilities are presented graphically for alphabet sizes of 2, 8, and 32. The performance is shown to be within 3 dB of that of an optimum square-law combiner for moderate alphabet sizes when there is no restriction on the allowable number... View full abstract»

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  • An Experimental Comparison of Coding Vs. Frequency Diversity for HF Telegraphy Transmission

    Publication Year: 1966, Page(s):532 - 533
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (227 KB)

    This note reports a telegraphy test in which a Rate 1/2 error-correcting coding system was operated on two channels of an HF modem while an in-band diversity system transmitted the same information on two other channels. Error rates of coding and diversity operation are given, showing that coding was greatly superior to diversity when each used the same bandwidth. 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