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IRE Transactions on Communications Systems

Issue 3 • Date September 1960

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Displaying Results 1 - 14 of 14
  • [Front cover and table of contents]

    Publication Year: 1960, Page(s): 0
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  • The swinging pendulum

    Publication Year: 1960, Page(s):139 - 140
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  • The Comparison of Digital Communication Systems

    Publication Year: 1960, Page(s):141 - 150
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1022 KB)

    Two methods are proposed for comparing the performances of digital communication systems differing in the number of available signals, in bandwidth, in rate of transmission, and in complexity. The systems are ranked on the basis of the probability of correct reception of transmitted messages. The signal durations are adjusted so that the systems have either equal bandwidths or equal rates of trans... View full abstract»

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  • Combined Digital Phase and Amplitude Modulation Communication Systems

    Publication Year: 1960, Page(s):150 - 155
    Cited by:  Papers (56)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (599 KB)

    The performance of phase modulation communication systems is investigated for the asymptotic case of a high signal-to-noise ratio. A simple and excellent approximation to the probability of error is derived for both coherent and phase-comparison demodulation. In addition, a simple expression is derived for the asymptotic degradation of phase-comparison demodulation. When the number of bits per sam... View full abstract»

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  • A New Transmission Method for Pulse-Code Modulation Communication Systems

    Publication Year: 1960, Page(s):155 - 160
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (670 KB)

    This paper presents the results of a study of the basic factors underlying the selection of a preferable method of transmission for pulse-code modulation communication systems. A new method of transmission, called biternary, is described and is compared with quaternary transmission, as a means of doubling the channel capacity of PCM systems without requiring increased bandwidth or transmission fac... View full abstract»

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  • Cozi Oblique Incidence Ionospheric Soundings Using Normal Communication Transmissions

    Publication Year: 1960, Page(s):160 - 164
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    Oblique incidence backscatter soundings have long been used in probing the ionosphere. These have normally employed pulse transmissions and thus have required either special equipment, or special modifications to existing communications equipment for transmission and reception of such signals. A new technique has been developed which allows normal communication or broadcast transmissions to be use... View full abstract»

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  • Use of Optical Frequencies for Space Communication

    Publication Year: 1960, Page(s):164 - 168
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (687 KB)

    The spectrum from the infrared through the visible to gamma rays has been surveyed for signalling from Earth or an Earth satellite to a spaceship at planetary distances. The best region for signalling from a satellite vehicle appears to be from 2000 to 400 angstroms. One information bit per second could be sent for a distance many times the diameter of the solar system. If the source is to be on t... View full abstract»

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  • Radio Relaying by Reflection from the Sun

    Publication Year: 1960, Page(s):169 - 172
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB)

    The possibility of using radio reflection from the sun to provide a communication link supplementing that using moon reflections is investigated analytically. Reflection and absorption of an incident signal in the solar atmosphere, and thermal noise radiated by the sun, are considered together with transmitter capabilities to find the operating frequency giving optimum signal-to-noise ratio. The d... View full abstract»

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  • Fading Loss in Diversity Systems

    Publication Year: 1960, Page(s):173 - 176
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (415 KB)

    In a communication system using optimum diversity combining, the mean signal-to-noise ratio of the combined signal is the sum of the mean signal-to-noise ratios of the separate signals. However, the effective signal-to-noise ratio of the combined signal is less than this. The ratio of the mean to effective signal-to-noise ratios of the combined signal is called the fading loss. The effective signa... View full abstract»

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  • The Design of Wide-Band Scatter Systems

    Publication Year: 1960, Page(s):177 - 182
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (533 KB)

    The modulation bandwidth that a scatter system can handle is mainly determined by the transmitting and receiving antenna beamwidths. A higher carrier frequency, therefore, permits the use of a smaller antenna. The transmitter power may then be chosen to give an adequate carrier-to-noise ratio. A method of reducing the differential delay in diversity receivers which extends the modulation band a gi... View full abstract»

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  • FM and SSB Radiotelephone Tests on a VHF Ionospheric Scatter Link During Multipath Conditions

    Publication Year: 1960, Page(s):183 - 187
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Experiments have been carried out on an ionosphericscatter link to observe the effects of long-delayed multipath signals, caused by F2propagated back scatter, on the intelligibility of voice communication. Frequency modulation and single-sideband modulation equipments were used for the tests. During periods when the back-scatter signal levels approached the level of the normal ionospher... View full abstract»

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  • Criteria for the Ultimate Capability of the Optimized Tropospheric Scatter System

    Publication Year: 1960, Page(s):187 - 192
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (542 KB)

    Behavior of the tropospheric scatter mechanism is now sufficiently well understood to permit a determination of optimum transmission criteria. The requirements for optimization are established from the channel signal-to-noise ratio equation. It is shown that the optimum is related not only to the basic RF transmission loss, but also to the effective noise figure, antenna gain and medium aperture l... View full abstract»

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  • Simple Methods for Designing Troposcatter Circuits

    Publication Year: 1960, Page(s):193 - 198
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (515 KB)

    As troposcatter circuits come more and more widely into use, there is a need for simple and reasonably accurate design methods for routine use, since the speed of obtaining a suitable design is sometimes of the utmost importance. This paper attempts to present such a method, derived primarily from experimental data, but with occasional reliance upon theoretical calculations. Certain essential desi... View full abstract»

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  • [Back matter]

    Publication Year: 1960, Page(s): 0
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Aims & Scope

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

Full Aims & Scope