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IRE Transactions on Communications Systems

Issue 1 • Date March 1956

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

    Publication Year: 1956, Page(s): 0
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    Freely Available from IEEE
  • Keynote address - Symposium on Communications by Scatter Techniques

    Publication Year: 1956, Page(s):3 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    The newly developed scatter technique appears to make possible extremely reliable communication circuits over distances of 100 to 1000 mi. These distances had previously been considered too short for good ionospheric propagation and too long for VHF or UHF transmissions. Thus, the facts brought forth in the investigation of scatter propagation have led to a modification of the theories and concept... View full abstract»

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  • Some practical aspects of auroral propagation

    Publication Year: 1956, Page(s): 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    Assoclated with visible auroral activity there is some kind of reflection or scattering mechanism that can result in radio communication in the VHF band over distances up to 1000 km with low power transmitters and probably up to 2000 km with high power transmitters. The transmission-loss experienced over such a circuit is somewhat less than is involved in regular VHF scatter-communication but is m... View full abstract»

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  • Progress of tropospheric propagation research related to communications beyond the horizon

    Publication Year: 1956, Page(s):6 - 16
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    It is proposed to give a simple elementary review of tropospheric mechanisms believed to be capable of propagating short radio waves well beyond the earth's horizon together with some selected experimental data indicatine the potential communication capacity of these tropospheric propagation mechanisms. In view of the wide general interest in the useful applications of the propagation of short rad... View full abstract»

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  • VHF propagation by ionospheric scattering - a survey of experimental results

    Publication Year: 1956, Page(s):17 - 27
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (978 KB)

    A brief survey is given of results from an experimental program extending over the last five years to investigate the nature and characteristics of high-loss regular VHF propagation by means of scattering and other mechanisms in the lower ionosphere. Short-term characteristics as well as diurnal, seasonal and geographical variation of the observed signals are described. The results of pulse-determ... View full abstract»

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  • Practical consideration for forward scatter applications

    Publication Year: 1956, Page(s):28 - 31
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (542 KB)

    It is now possible to provide communications with high reliability factors in geographical areas which are resistant to the more conventional high-frequency radio. For the past two years, the US Air Force has been operating an ionospheric scatter system (FPIS) between Loring AFB, Maine, USA, and Thule AFB, Greenland. Relay stations in this system are located at Goose Bay, Labrador, Canada and Sond... View full abstract»

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  • Some Meteorological Effects on Scattered Radio Waves

    Publication Year: 1956, Page(s):32 - 38
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (605 KB)

    The long term variations of received scattered fields due to atmospheric effects are estimated for frequencies of 100 to 50,000 Mc and over propagation paths of 100 to 1000 miles. The long term variations are presented in two parts: (1) empirically derived variations excluding absorption and (2) theoretically derived variations due to gaseous atmospheric absorption. The absorption effects are obta... View full abstract»

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  • Point-to-Point Radio Relaying via the Scatter Mode of Tropospheric Propogation

    Publication Year: 1956, Page(s):39 - 49
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    Formulas are given for determining the transmitter power required to provide a specified grade of service in point-to-point radio relaying of the following types of signals: television, frequency modulation high fidelity music, frequency modulation voice, frequency shift telegraph, and a just measurable signal. Allowance is made for the antenna gains, the carrier frequency, the systems bandwidth, ... View full abstract»

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  • A simplified diversity communication system for beyond-the-horizon links

    Publication Year: 1956, Page(s):50 - 55
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (335 KB)

    For nearly a year the US Federal TelecomMunication Laboratories have had in operation a 900 mc beyond-the-horizon two-way link between the Nutley, New Jersey laboratories and Southampton, Long Island. Early results using PTM have already been reported. Briefly, an annual median path-loss some 20db greater than that predicted by Bullington was found, but the bandwidth was adequate for pulse modulat... View full abstract»

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  • High-Gain Antennas for VHF Scatter Propagation

    Publication Year: 1956, Page(s):56 - 63
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (793 KB)

    Rhombic antennas were the first type employed in the study of propagation via ionospheric scatter. By the use of electrically long leg-lengths gains of the order of 20 decibels were obtained. Experimental measurements using model techniques indicated that assumptions usual in the design of rhombic antennas remained valid even for leg-lengths of 25 to 40 wavelengths. In order to obtain a more compa... View full abstract»

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  • Transmitting Tubes for Scatter Communications

    Publication Year: 1956, Page(s):64 - 68
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    Continuous wave klystron amplifiers have undergone considerable development in recent years, and a marked advance in the state of the art has resulted. The characteristics of these amplifiers that make them especially attractive for scatter communication will be reviewed. The design philosophy of some modern amplifiers will be reviewed, including the following tubes: 1) 10 kw output at 2000 mc, 50... View full abstract»

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  • Power amplifier klystron for U.H.F. transmission

    Publication Year: 1956, Page(s):69 - 76
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    A review of design considerations and expected performance of external cavity klystrons is given. Information on availability of these power amplifier klystron tubes is presented along with comments on systems engineering considerations in klystron applications. View full abstract»

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  • VHF Transhorizon Communication System Design

    Publication Year: 1956, Page(s):77 - 86
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1417 KB)

    The basic properties of a signal received over a typical VHF transhorizon circuit are presented. The necessary parameters and features of a system designed to utilize efficiently this signal are then considered. These include modulation, diversity reception, teletype transmission, frequency control, equipment reliability, and duplex operation. In conclusion curves are presented showing system voic... View full abstract»

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  • System Parameters Using Tropospheric Scatter Propagation

    Publication Year: 1956, Page(s):87 - 96
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (986 KB)

    Accumulated data from published sources and from unpublished research on tropospheric forward scatter propagation are reviewed and condensed for practical applicatian to FM communication systems. Antennas suitable for use on scatter paths are reviewed and the limitations on usable gains are discussed. General design methods for FM systems are presented and reduced to a design chart that includes t... View full abstract»

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  • A simple picture of tropospheric radio scattering

    Publication Year: 1956, Page(s):97 - 101
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    The purpose of this paper is to describe the scatteriing of radio waves by a turbulent troposphere in a simple way. The description provides a useful picture for the radio engineer who mustst apply the scatter mechanism to a system. It does not replace a more rigorous treatment or oversimplify to the extent that any important ideas are omitted. It is hoped that this prosentation will facilitate th... View full abstract»

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  • Long distance VHF-UHF tropospheric field strengths and certain of their implications for radio communications (abstract)

    Publication Year: 1956, Page(s):102 - 103
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (135 KB)

    Sufficient knowledge of normal VHF-UHF tropospheric field strengths has been obtained for distances far beyond the radio horizon to enable sensible planning of communication circuits having ranges of some 200-250 statute miles. It is desirable, of course, to exploit this propagation mode to the greatest possible distance and this requires a detailed knowledge of the path loss to distances beyond 2... View full abstract»

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  • Results of propagation test at 505 Mc and 4090 Mc on beyond horizon paths

    Publication Year: 1956, Page(s):104 - 111
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    This paper summarizes the results of some radio propagation tests that were conducted for a full year in Newfoundland starting in late 1953. A more detailed paper on these results was declassified in time to be included in the October 1955 issue of the Proceedings of the IRE. The Newfoundland tests were sponsored by the US Air Force to obtain information for engineering beyond horizon radio relay ... View full abstract»

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  • Some ionosphere scatter techniques

    Publication Year: 1956, Page(s):112 - 117
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    This paper discusses three possible applications of ionospheric scatter which are useful to the high frequency communicator. The first of these involves the use of backscatter to determine the zone of communication for a certain frequency when utilizing normal innosphere modes of propagation. Normal modes are those in which the layer is sufficiently ionized to allow a direct ray to be propagated f... View full abstract»

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  • Signal Fluctuations in Long-Range Overwater Propagation

    Publication Year: 1956, Page(s):118 - 122
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (463 KB)

    Measurements of overwater propagation in the Pacific on 3 and 9 cm between airborne transmitters and fixed receivers are reported. Within the horizon, the direct and surface-reflected rays formed the usual interference patterns. Beyond the horizon, the 3-cm signal always behaved in general accord with normal-mode theory, the attenuation rate averaging 0.5 plus or minus 0.2 db per (nautical) mile. ... View full abstract»

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  • [Back cover]

    Publication Year: 1956, Page(s): 0
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    Freely Available from IEEE

Aims & Scope

This Transactions ceased publication in 1962. The current retitled publication is  IEEE Transactions on Communications.

Full Aims & Scope