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IRE Transactions on Communications Systems

Issue 1 • Date March 1962

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Displaying Results 1 - 21 of 21
  • [Front cover and table of contents]

    Publication Year: 1962, Page(s): 0
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  • Toward A Communication System Discipline

    Publication Year: 1962, Page(s): 1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    First Page of the Article
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  • Predicting the Performance of Tropospheric Communication Links, Singly and in Tandem

    Publication Year: 1962, Page(s):2 - 22
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2665 KB)

    Performance of long-distance tropospheric communication circuits, either singly or in tandem, is predicted in terms of the probability of obtaining a specified grade of service or better for various percentages of time. The grade of service is determined by the minimum acceptable ratio of hourly median predetection rms-signal to rms-noise for the type of intelligence to be transmitted. The standar... View full abstract»

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  • On Optimal Diversity Reception, II

    Publication Year: 1962, Page(s):22 - 31
    Cited by:  Papers (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    In a previous paper the structure of the optimal multi-diversity receiver for a fading, noisy diversity channel was determined under the assumption that the memory of the receiver does not extend beyond the time interval of the signal currently being received. The probability of error for such a receiver is determined herein under the following assumptions: the channel is binary and symmetric; the... View full abstract»

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  • Predetection Diversity Combining with Selectively Fading Channels

    Publication Year: 1962, Page(s):32 - 42
    Cited by:  Papers (83)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (859 KB)

    The effective use of predetection (or IF) linear combining of diversity channels requires that all frequency components be added in = phase. In view of the time-variant phase characteristics of fading channels, some form of instantaneous phase correction must be provided prior to the diversity combining so that proper in-phase addition will result. If the instantaneous fading is not uniform over t... View full abstract»

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  • Effect of Propagation Fading and Antenna Fluctuations on Communication Systems in a Jamming Environment

    Publication Year: 1962, Page(s):43 - 60
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2199 KB)

    The effect of different degrees of both slow propagation fading and antenna fluctuations on the performance of communication systems in the presence of interference was analyzed. The performance of the system was evaluated from the aspect of the probability of error which in turn is related to the required system margin. The results are plotted for a large variety of fading conditions for both the... View full abstract»

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  • Multiple Echo Distortion in Frequency-Modulation, Frequency-Division-Multiplex Trunk Radio Systems

    Publication Year: 1962, Page(s):61 - 71
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    This paper is concerned with intermodulation distortion in FM, FDM trunk radio systems due to a number of echoes of differing amplitudes and delay times. General formulas are developed, and applied to the case of a 960-channel system subjected to distortion due to echoes from flanges in waveguide runs. Examples considered are 100- and 200-ft runs of RG-50/U waveguide, in 10-ft sections, for use in... View full abstract»

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  • Performance of Error-Correcting Codes

    Publication Year: 1962, Page(s):72 - 85
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1132 KB)

    Binary decoding of relatively short codes corrupted by Gaussian noise or pulse interference has been considered in applications for which the minimum useful information block length is unity, equal to the information bit capacity of a code, or equal to an integral multiple of the information capacity of a code. The following results pertain to applications which are further characterized by the pe... View full abstract»

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  • Error Rates in Coherent Communication Systems

    Publication Year: 1962, Page(s):86 - 89
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1141 KB)

    In coherent PCM communication systems where the noise is additive and Gaussian (such as in space communication systems) two classes of nonredundant coding are of special interest. One is Regular Simplex Coding which yields the lowest possible error rate for fixed SNR. The other is Bi-orthogonal Coding because of its many desirable features from the practical point of view. In this paper the error ... View full abstract»

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  • A Coherent Digital Amplitude and Phase Modulation Scheme

    Publication Year: 1962, Page(s):90 - 95
    Cited by:  Papers (46)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (503 KB)

    In this paper, we present a technique for a combination of amplitude and phase modulation for digital communication. This technique assumes phase coherence between transmitter and receiver. For purposes of analysis, we also assume baud synchronization. The technique involves the simultaneous and independent amplitude modulation of two carriers of the same frequency which are in quadrature with eac... View full abstract»

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  • A Comparison of Several Types of Modulation

    Publication Year: 1962, Page(s):96 - 101
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    This report presents a brief mathematical analysis of various modulation-demodulation combinations which may be used in data-link systems. Both digital and analog transmission systems are discussed. For some of the more important digital (binary) systems, the probability of making an error in detecting a binary symbol (using the solutions of Cahn, and Berry and Garbedian) is used to compare the va... View full abstract»

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  • Asymmetrical Sideband Transmission of Position Modulated Pulses

    Publication Year: 1962, Page(s):102 - 108
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The present analysis is a theoretical examination of the asymmetrical sideband transmission in PPM systems. It is shown that the synchronously detected component of the envelope of an asymmetrically transmitted impulse can possess a steeper slope than the envelope itself and that over-all transient time of this component may be reduced. The effect of various degrees of transmission asymmetry is ca... View full abstract»

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  • A Synchronized Pulse Communication System with Pseudorandom Interpulse Period

    Publication Year: 1962, Page(s):109 - 113
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    The security of a pulse type communication system can be improved by the incorporation of an element of randomness in the time of transmission. A system is simulated in which a remote receiver is caused to be gated on at apparently random intervals which are in synchronism with the arrival of the signal from the controlling local transmitter. The time of transmission is not random, but is determin... View full abstract»

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  • A New Pulse Modulated Speech Communication System Having a Minimum Duty Cycle

    Publication Year: 1962, Page(s):114 - 118
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

    The development at the Navy Electronics Laboratory of a low duty cycle, multichannel pulse modulation communication system is described. The system provides adequate naturalness of speech while maintaining a quantized sampling rate which is proportional to the information bandwidth. First, a general description of the speech processing and reprocessing techniques is given. This includes techniques... View full abstract»

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  • Digital Computer Simulation of Communications Networks

    Publication Year: 1962, Page(s):118 - 125
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (809 KB)

    In planning large scale communications networks, the systems engineer must define the best mix of system trunking assignments, switching logic, and system operating policies. Field tests are not usually a practical method of evaluating network performance as the above design parameters are changed-particularly if the networks are complex and if many operating personnel are involved. An alternative... View full abstract»

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  • Overlapping Tessellated Communications Networks

    Publication Year: 1962, Page(s):125 - 129
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    In this paper we present a theory of interconnecting communication networks which have the appearance of overlapping tessellations. We have derived the bandwidth requirements for two types of networks-the linear spanning and the inclusive spanning. The efficacy of one network as compared to the other is measured by the additional switching requirements for various spanning doctrines. View full abstract»

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  • Grade of Service of Direct Traffic Mixed With Store-and-Forward Traffic

    Publication Year: 1962, Page(s):130 - 138
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    The dual use of trunks for both direct and store-andforward (S/F) traffic makes high trunk efficiency possible. The resultant trunk savings are important in communication systems in which long-haul trunks contribute heavily to the cost of the system. This paper reports work on the computation of trunking tables that could be used to engineer trunk requirements for prescribed loads and distribution... View full abstract»

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  • Space Communications System Design Nomographs

    Publication Year: 1962, Page(s):138 - 141
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  • Optimum Orientation of Receiving Antennas

    Publication Year: 1962, Page(s):141 - 142
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  • Beam-Controlled Linear Klystron Amplifiers for Improved SSB Efficiency

    Publication Year: 1962, Page(s):142 - 145
    Cited by:  Papers (1)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (470 KB)

    The purpose of this communication is to illustrate a new mode of operation for klystron power amplifiers for SSB or AM signals and to state the experimental results obtained. The major objectives of the development were to obtain maximum efficiency, minimum size and weight, and an acceptable intermodulation distortion in a 24-channel FDM system operating in the 2200-2400 Mc range. Using dynamic co... View full abstract»

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  • [Back cover]

    Publication Year: 1962, 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