By Topic

IRE Transactions on Communications Systems

Issue 1 • Date March 1960

Filter Results

Displaying Results 1 - 15 of 15
  • [Front cover and table of contents]

    Publication Year: 1960, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (109 KB)
    Freely Available from IEEE
  • Profit or Loss

    Publication Year: 1960, Page(s):1 - 2
    Request permission for commercial reuse | PDF file iconPDF (192 KB)
    Freely Available from IEEE
  • Inverse Ionosphere

    Publication Year: 1960, Page(s):3 - 9
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (679 KB)

    The distortion introduced into a long-range communication system by unpredictable multipath conditions of the ionosphere is described in this paper. A device to eliminate this particular form of distortion is then described, using a sensing technique, a logical matrix, and a signal restoration network. Since both the multipath model of the ionosphere and the restoration network are linear, the pri... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Path-Loss Measuring Techniques and Equipment

    Publication Year: 1960, Page(s):9 - 13
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (643 KB)

    The planning of tropospheric scatter communication systems requires precise and reliable knowledge of the path loss. This paper describes the techniques and equipment used to evaluate proposed installations. The equipment operates in the frequency range of 875 to 940 or 1650 to 1950 mc with output powers of 10 or 100 watts. A logarithic recording system is used which makes possible a dynamic signa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimum Antenna Height for Ionospheric Scatter Communication

    Publication Year: 1960, Page(s):14 - 19
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    Radiation patterns of elevated antennas over spherical earth for scatter propagation in the lower ionosphere incorporating refraction, parallax, spherical divergence, tropospheric defocusing, and near-horizon diffraction have been used to compute the height gain function resulting from raising and lowering symmetric transmitting and receiving antennas for a fixed path length. This height gain func... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Results from a Three-Hop Tropospheric Scatter Link in Norway with Parallel Operations on 900 mc and 2200 mc

    Publication Year: 1960, Page(s):20 - 26
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (631 KB)

    A three-hop troposcatter system in Norway with simultaneous operation at 900 mc and 2200 mc is described briefly. From measurements on a 360-km hop in the period October 1957 to June 1958, it is concluded that 1) the monthly amplitude distributions are approximately Gaussian, and the 1-minute amplitude distributions are approximately of the Rayleigh type, 2) the signals are generally considerably ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance of a 640-Mile, 24-Channel UHF-SSB Experimental Communication System

    Publication Year: 1960, Page(s):26 - 33
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1575 KB)

    A mock-up communication system has been installed between Westford, Mass., and Winston-Salem, N. C., providing a 640-mile path as a test circuit to measure performance of a 24channel UHF-SSB system. The equipment is described, the theoretical performance of the system is given, and the performance of the system as to voice quality and signal-to-noise ratio in a telephone channel and simulated tele... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of the Performance of the Edmonton-Yellowknife Janet Circuit

    Publication Year: 1960, Page(s):33 - 40
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1096 KB)

    Trials of the Canadian Janet B system were carried out on an auroral zone circuit during July, 1958, and from early in December, 1958, until the middle of April, 1959. The July, 1958, trials, which were performed at frequencies in the vicinity of 40 mc, revealed the vulnerability of the system to polar blackout at these frequencies and to excessive error rates with rapidly fluctuating auroral sign... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Data Transmission Tests on Tropospheric Beyond-the-Horizon Radio System

    Publication Year: 1960, Page(s):40 - 43
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (397 KB)

    This paper presents the results of data transmission tests made on both single-link and multi-link tropospheric beyondthe-horizon radio systems. Tests were made at 750 or 1300 bits per second employing both double sideband AM and FM methods of data modulation. In the single-link tests the data performance was determined for various transmission parameters such as median channel noise, peak channel... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Frequency Stepping Scheme for Overcoming the Disastrous Effects of Multipath Distortion on High-Frequency FSK Communication Circuits

    Publication Year: 1960, Page(s):44 - 47
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    By changing frequency a small amount after transmission of each signaling element in FSK transmission, it is possible to avoid the mutual interference of the main and multipath propagated signal in a high-frequency communications system. Thus, it is practical to employ four-channel time division multiplex systems under multipath conditions that would otherwise render them useless. This paper descr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transmitter Power Control in Two-Way Communications System

    Publication Year: 1960, Page(s):48 - 56
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1069 KB)

    A typical scatter communications loop consists of two sites, each having transmitters and receivers operating simultaneously over a two-way microwave loop. In tropospheric scatter systems, disturbances in the microwave paths produce dynamic fading of RF signal levels at the receivers. To achieve high system reliability, the current practice is to continuously transmit high power, adequate to maint... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Sum of Log-Normal Probability Distributions in Scatter Transmission Systems

    Publication Year: 1960, Page(s):57 - 67
    Cited by:  Papers (268)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (938 KB)

    The long-term fluctuation of transmission loss in scatter propagation systems has been found to have a logarithmicnormal distribution. In other words, the scatter loss in decibels has Gaussian statistical distribution. Therefore, in many important communication systems (e.g., FM), the noise power of a radio jump, or hop, has log-normal statistical distribution. In a multihop system, the noise powe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Intermodulation Distortion and Efficiency Analysis of Multicarrier Repeaters

    Publication Year: 1960, Page(s):68 - 71
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (426 KB)

    Under suitable conditions a common RF repeater may be used to amplify a number of modulated carriers. The basic limitations are efficiency and intermodulation distortion introduced within the frequency band of any modulated carrier wave by the other modulated carrier waves. Any repeater contains a high-power tube for which the output-input characteristic has nonlinearities that introduce a certain... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Constant-Ratio Code and Automatic-RQ on Transoceanic HF Radio Services

    Publication Year: 1960, Page(s):72 - 75
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (506 KB)

    Historical development, of present-day commercial teleprinter services, is briefly tabulated according to dates of significant advances. The 7-unit form of basic constant-ratio code is given, and its advantages explained; indicative values of improvement are tabulated. A general description of the Automatic-RQ method and system-rather than specific designs-is given. Commercial application and grow... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • [Back matter]

    Publication Year: 1960, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (636 KB)
    Freely Available from IEEE

Aims & Scope

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

Full Aims & Scope