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Proceedings of the IRE

Issue 12 • Date Dec. 1956

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Displaying Results 1 - 25 of 46
  • Contents

    Publication Year: 1956, Page(s):1661 - 1662
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  • Poles and Zeros

    Publication Year: 1956, Page(s): 1663
    Cited by:  Papers (2)
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  • Tribute to Lee de Forest

    Publication Year: 1956, Page(s): 1664
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    Freely Available from IEEE
  • Single-Sideband Techniques as Related to Spectrum Administration

    Publication Year: 1956, Page(s): 1665
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  • Introduction to Single-Sideband Issue

    Publication Year: 1956, Page(s): 1666
    Cited by:  Papers (2)
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  • An Introduction to Single-Sideband Communications

    Publication Year: 1956, Page(s):1667 - 1675
    Cited by:  Papers (1)  |  Patents (2)
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    The elements of the SSB communication system and its advantages over the AM system are discussed. These advantages include benefits to the individual user, generally in the form of reduced size and weight of equipment or more effective communication when conditions limit the size of the installation, and benefits to the radio environment which include spectrum conservation and reduction in the tot... View full abstract»

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  • Early History of Single-Sideband Transmission

    Publication Year: 1956, Page(s):1676 - 1679
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1822 KB)

    This paper briefly reviews wire and radio art at the time of the invention of the single-sideband method of transmission. Recognition of sidebands, realization that either sideband contains the entire information and that the carrier wave conveys none, and the experimental discovery of homodyne reception, all preceded the invention. The method was first employed commercially in carrier telephone s... View full abstract»

    Freely Available from IEEE
  • Synthesizer Stabilized Single-Sideband Systems

    Publication Year: 1956, Page(s):1680 - 1685
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1318 KB)

    Single-sideband high frequency communications systemhs have several advantages over AM, PM, and FM for long-range communications. These advantages include low harmonic and intermodulation distortion due to the behavior of the transmission medium, more efficient use of spectrum, and better power efficiency. Proposed precise frequency control would make it possible to employ single-sideband systems ... View full abstract»

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  • A Suggestion for Spectrum Conservation

    Publication Year: 1956, Page(s):1685 - 1688
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    Frequency stability and reduced bandwidth of single sideband suppressed carrier transmissions are important factors which assist in easing the present crowding of the high frequency bands. Present channel assignments are ordinarily predicated upon a frequency stability of 0.01 per cent and double sideband amplitude modulation. By making the transition to accurate frequency control and minimum band... View full abstract»

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  • Power and Economics of Single Sideband

    Publication Year: 1956, Page(s):1689 - 1691
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    Prime cost of equipment and continuing cost of operation are both important in the selection of communications apparatus. Listings are given for both transmitters and receivers on a comparable basis. Size, weight, floor area, and prime equipment costs are included to permit easy comparisons between single sideband and conventional equipment. Comparison of the equipments on all factors indicate the... View full abstract»

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  • Application of Single-Sideband Technique to Frequency Shift Telegraph

    Publication Year: 1956, Page(s):1692 - 1697
    Cited by:  Papers (1)
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    Congestion of the 2 to 30 mc spectrum makes mandatory the reduction of bandwidths, on all types of transmissions, to the minimum technically required. This paper describes a method of economically utilizing the narrow-band plus high-stability techniques, normally associated with single-sideband systems, for frequency shift telegraph operation of one or more channels per transmitter. The frequency ... View full abstract»

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  • Frequency Control Techniques for Single Sideband

    Publication Year: 1956, Page(s):1697 - 1702
    Cited by:  Papers (3)
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    The virtual elimination of the carrier in single-side-band emission makes mandatory the accurate control of the frequencies used at the terminals of a single-sideband communications circuit. Independent, absolute frequency control of the receiver and transmitter provide immunity to propagation vagaries and interference which plague systems using partly-suppressed carrier and afc. Oscillators using... View full abstract»

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  • A Third Method of Generation and Detection of Single-Sideband Signals

    Publication Year: 1956, Page(s):1703 - 1705
    Cited by:  Papers (117)  |  Patents (80)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    This paper presents a third method of generation and detection of a single-sideband signal. The method is basically different from either the conventional filter or phasing method in that no sharp cutoff filters or wide-band 90° phase-difference networks are needed. This system is especially suited to keeping the signal energy confined to the desired bandwidth. Any unwanted sideband occupies the ... View full abstract»

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  • Comparison of Linear Single-Sideband Transmitters with Envelope Elimination and Restoration Single-Sideband Transmitters

    Publication Year: 1956, Page(s):1706 - 1712
    Cited by:  Papers (21)  |  Patents (7)
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    The Elimination and Restoration System was originally described in 1952 [1]. The purpose of the following is to evaluate certain basic characteristics of the Envelope Elimination and Restoration System and to compare it with the Linear Amplifier System [2,3]. View full abstract»

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  • Synchronous Communications

    Publication Year: 1956, Page(s):1713 - 1718
    Cited by:  Papers (76)  |  Patents (8)
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    It can be shown that present usage of amplitude modulation does not permit the inherent capabilities of the modulation process to be realized. In order to achieve the ultimate performance of which AM is capable synchronous or coherent detection techniques must be used at the receiver and carrier suppression must be employed at the transmitter. When a performance comparison is made between a synchr... View full abstract»

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  • The Phase-Shift Method of Single-Sideband Signal Generation

    Publication Year: 1956, Page(s):1718 - 1735
    Cited by:  Papers (6)  |  Patents (5)
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    A general expression is developed for sideband suppression obtained with the phase-shift method of single-sideband signal generation. The sideband suppression ratio is expressed in terms of four systems parameters, three of which are governed by the characteristics of wide-band phase-shift networks employed in such signal generators. Several typical phase-shift network configurations are analyzed ... View full abstract»

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  • The Phase-Shift Method of Single-Sideband Signal Reception

    Publication Year: 1956, Page(s):1735 - 1743
    Cited by:  Papers (25)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1750 KB)

    The phase-shift method of single-sideband signal reception exhibits characteristics determined by four principal design pararneters. The expression developed for the ratio of sideband rejection to sideband acceptance is similar to that which expresses the sideband suppression ratio obtainable with the phase-shift method single-sideband signal generation. Zero frequency output signals derived by de... View full abstract»

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  • Electromechanical Filters for Single-Sideband Applications

    Publication Year: 1956, Page(s):1744 - 1749
    Cited by:  Papers (2)
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    In discussing some of the basic properties of electromechanical filters, both longitudinal and torsional modes of vibration are considered. The torsional mode has advantages which make it superior to the longitudinal mode in most applications. The limits of the frequency range, at the present state of the art, are from approximately 50 to 600 kc. From a production standpoint, however, the preferre... View full abstract»

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  • Factors Influencing Single Sideband Receiver Design

    Publication Year: 1956, Page(s):1750 - 1753
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    This paper presents a brief discussion of some of the problems which confront the designer of single sideband receiving equipment. Among the items considered are frequency stability, cross modulation, gain distribution and diversity combining. Some of the presently used techniques for single sideband receivers are also presented. View full abstract»

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  • Correction

    Publication Year: 1956, Page(s): 1753
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  • Linear Power Amplifier Design

    Publication Year: 1956, Page(s):1754 - 1759
    Cited by:  Papers (3)
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    The principal requirements of linear power amplifiers for single-sideband and frequency multiplexing service are low distortion and reliability. The nature of distortion generation is discussed and a theoretical tube characteristic for zero distortion in class AB operation is presented. Simple expressions for quickly estimating tube operating conditions and a more detailed presentation of the Chaf... View full abstract»

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  • Distortion Reducing Means for Single-Sideband Transmitters

    Publication Year: 1956, Page(s):1760 - 1765
    Cited by:  Papers (8)  |  Patents (1)
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    The need for reduced levels of intermodulation distortion products from linear rf power amplifiers is increasing as the state of the art advances. Two basic means of reducing distortion to levels better than is obtainable from available tubes are shown. One is direct rf feedback and the other is envelope distortion cancelling modulation. Some of the problems and limitations as well as advantages a... View full abstract»

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  • Correction

    Publication Year: 1956, Page(s): 1765
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  • Automatic Tuning Techniques for Single-Sideband Equipment

    Publication Year: 1956, Page(s):1766 - 1774
    Cited by:  Papers (1)
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    Methods of automatically positioning tuned circuits for rapid frequency changes are discussed. Equipment ranging from low level single-sideband exciter-receivers to high power linear rf amplifiers are considered with attention given to the correlation of positioning accuracy, tuning change time, and ultimate cost of equipment. The merits and limitations of mechanical positioning, follow-up potenti... View full abstract»

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  • Linearity Testing Techniques for Sideband Equipment

    Publication Year: 1956, Page(s):1775 - 1782
    Cited by:  Papers (2)
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    The linear rf amplifier is a vital segment of all sideband equipments and measurement of its degree of nonlinearity is therefore of paramount importance. The basis for using the two-tone method of measurement is described by showing the types of nonlinear distortion products generated by the different orders of transfer characteristic curvature. Measurements by noise loading are described and it i... View full abstract»

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Aims & Scope

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

Full Aims & Scope