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Proceedings of the IRE

Issue 1 • Date Jan. 1960

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  • Information about the Society

    Publication Year: 1960 , Page(s): 1
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  • Table of contents

    Publication Year: 1960 , Page(s): 2
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  • Proceedings of the IRE Contents of Volume 48 - 1960

    Publication Year: 1960 , Page(s): 3 - 9
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  • Index to authors

    Publication Year: 1960 , Page(s): 9 - 11
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  • Index to subjects

    Publication Year: 1960 , Page(s): 11 - 16
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  • Nontechnical index

    Publication Year: 1960 , Page(s): 17 - 20
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  • Index to book reviews

    Publication Year: 1960 , Page(s): 21 - 22
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  • Poles and Zeros

    Publication Year: 1960 , Page(s): 1
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  • Ronald L. McFarlan, President, 1960

    Publication Year: 1960 , Page(s): 2
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  • Scanning the issue

    Publication Year: 1960 , Page(s): 3
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  • Radio Transmission by Ionospheric and Tropospheric Scatter

    Publication Year: 1960 , Page(s): 4 - 44
    Cited by:  Papers (12)
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  • The Ninth Plenary Assembly of the CCIR

    Publication Year: 1960 , Page(s): 45 - 53
    Cited by:  Papers (1)
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    The International Radio Consultative Committee held its Ninth Plenary Assembly in Los Angeles, California, April 2 through 29, 1959. The CCIR studies the technical factors affecting international radio telecommunications and makes recommendations to administrations which are of importance in the international allocation and usage of the radio spectrum. These studies are made by fourteen Study Groups, each dealing with certain aspects of international telecommunication. At the Los Angeles meeting, the technical aspects of relatively new techniques for conservation of spectrum space were considered. Transmission and receiving standards, propagation characteristics, monitoring methods, modulation techniques including single sideband and stereo sound broadcasting, and the new international aspects of telecommunication with and between space vehicles were among the many topics considered by the Assembly. View full abstract»

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  • Crosstalk Due to Finite Limiting of Frequency-Multiplexed Signals

    Publication Year: 1960 , Page(s): 53 - 59
    Cited by:  Papers (23)
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    It is a well-known fact that amplitude nonlinearity produces crosstalk between frequency-multiplexed channels, an important example being clipping in a saturating amplifier. Since the amplitude distribution of the composite signal for a large number of channels is essentially Gaussian, the crosstalk can be calculated with reasonable accuracy by assuming that the input signal is random noise, except for a narrow gap in which a sine wave is inserted to represent the signal in a selected channel. This assumption allows use of standard analytical techniques to determine the output signal-to-crosstalk ratio in the selected channel as a function of the clipping level. The resulting value for infinite clipping is about 9 db. The crosstalk decreases rapidly as the clipping level is raised, and a value of 40 db is obtained for clipping one per cent of time. An optimum clipping level, which provides the highest signal-to-total-interference ratio, may be determined when noise is present in the receiver, and allows definition of "peak factor allowance." An allowance of several db is found to be adequate for frequency-multiplexed binary data channels. View full abstract»

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  • IRE Standards on Methods of Measuring Noise in Linear Twoports, 1959

    Publication Year: 1960 , Page(s): 60 - 68
    Cited by:  Papers (60)  |  Patents (38)
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  • Representation of Noise in Linear Twoports

    Publication Year: 1960 , Page(s): 69 - 74
    Cited by:  Papers (115)  |  Patents (1)
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    This is a tutorial paper, written by the Subcommittee on Noise, IRE 7.9, to provide the theoretical background for some of the IRE Standards on Methods of Measuring Noise in Electron Tubes. The general-circuit-parameter representation of a linear two-port with internal sources and the Fourier representations of stationary noise sources are reviewed. The relationship between spectral densities and mean-square fluctuations is given and the noise factor of the linear twoport is expressed in terms of the mean-square fluctuations of the source current and the internal noise sources. The noise current is then split into two components, one perfectly correlated and one uncorrelated with the noise voltage. Expressed in terms of the noise voltage and these components of the noise current, the noise factor is then shown to be a function of four parameters which are independent of the circuit external to the twoport. View full abstract»

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  • Multipole Representation for an Equivalent Cardiac Generator

    Publication Year: 1960 , Page(s): 75 - 79
    Cited by:  Papers (60)
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    One facet of electrocardiography has traditionally dealt with the relationship between body surface potentials and an equivalent generator that could have produced them. A key problem facing investigators today is whether a single fixed-location dipole is a suitable equivalent generator. The equivalent cardiac generator developed here provides a means for resolving this question. It consists of a collection of multipoles which, if placed at a point in a homogeneous isotropic conductor shaped like the human body, will give rise to the same potential distribution on the surface as that observed on the body itself. The multipole components can be evaluated by performing appropriate integrations of the potential over the body surface. View full abstract»

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  • The Effect of a Cathode Impedance on the Frequency Stability of Linear Oscillators

    Publication Year: 1960 , Page(s): 80 - 88
    Cited by:  Papers (1)
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    High stability oscillators usually employ tubes having rather high values of transconductance. Excellent frequency stability as to valve capacitance and supply voltage changes results, but a change of the cathode impedance produces large frequency changes. Cathode impedance changes in a valve may reach 100 ohms during its lifetime because of the growth of an interface layer between the oxide coating and the cathode sleeve. In order to reduce the effect of the cathode impedance, the gm value must be reduced considerably, the optimum being near 1/Xg, where Xg is the grid-cathode reactance. The ratio of the anode/grid RF voltages should be made equal to the ratio of grid/anode capacitances, or equal to unity. Full advantage cannot always be taken of the recommended gm value, as this makes the oscillator more susceptible to random capacitance variations and to changes of supply voltage, but a considerable reduction below customary values is possible. In this way, the longterm stability can be improved at least ten times. View full abstract»

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  • Multiple Diversity with Nonindependent Fading

    Publication Year: 1960 , Page(s): 89 - 104
    Cited by:  Papers (159)  |  Patents (1)
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    Previous analyses of diversity techniques are extended to include the performance of an optimum (maximal-ratio) combiner in the case of nonindependent signal fading fluctuations, for an arbitrary number of diversity branches. The analysis includes the general possibility of correlations among the quadrature components of the various signals. Some computational simplifications for certain cases of physical interest are given, as well as a specific application to two problems in digital communications. View full abstract»

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  • Correspondence

    Publication Year: 1960 , Page(s): 105 - 124
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  • Contributors

    Publication Year: 1960 , Page(s): 125
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  • Books

    Publication Year: 1960 , Page(s): 126
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  • Scanning the Transactions

    Publication Year: 1960 , Page(s): 126 - 127
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  • Abstracts of IRE Transactions

    Publication Year: 1960 , Page(s): 127 - 130
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    The issues of IRE Transactions listed herein have recently been published, and are now available from the Institute of Radio Engineers, Inc. The contents of each issue and, where available, abstracts of technical papers are given. View full abstract»

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  • Abstracts and references

    Publication Year: 1960
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Aims & Scope

This Periodical ceased production in 1962. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope