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IEEE Transactions on Communications

Issue 10 • October 1978

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Displaying Results 1 - 17 of 17
  • [Front cover and table of contents]

    Publication Year: 1978, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (170 KB)
    Freely Available from IEEE
  • Co-Channel Interference of Spread Spectrum Systems in a Multiple User Environment

    Publication Year: 1978, Page(s):1405 - 1413
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (797 KB)

    This paper considers the mutual interference problem of several users employing the same spread spectrum technique in selected multiple user environments. The spread spectrum techniques consist of pseudo noise (PN), time division multiple access/PN, synchronous and asynchronous frequency hopping (FH). The environment consists of a desired transmitter-receiver pair located in an area where there ar... View full abstract»

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  • 32 Mbit/s Transmission of NTSC Color TV Signals by Composite DPCM Coding

    Publication Year: 1978, Page(s):1432 - 1439
    Cited by:  Papers (10)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (823 KB)

    A composite DPCM coding System was developed, which is capable of coding and transmitting an NTSC color TV signal without component separation at a 32.064 Mbit/s rate. The DPCM prediction method used is based on the algorithm that a luminance component prediction valuehat{y}and a carrier chrominance component prediction valuehat{c}are calculated individually, and then the com... View full abstract»

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  • Broad-Band Coaxial Boosted Media Employing Negative-Impedance Junctions and Amplifiers

    Publication Year: 1978, Page(s):1470 - 1472
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (218 KB)

    As an approach to the broad-band, multi-port, multilateral media with idealized transmitting ability for various communications, a "Flat Loss Boosted Coaxial Line" (FLB Line) with many ports, such a centipede, has been proposed. It has been built from Negativeresistance BridgedTtypesqrt{f}shape Boosters (FBA) with about 10 dB gain at 300 MHz and Negative-resistance Boosting J... View full abstract»

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  • Comments on "On Binary DPSK Detection"

    Publication Year: 1978, Page(s):1477 - 1478
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (217 KB)

    This brief correspondence notes the equivalence between the optimumM-ary DPSK receiver given recently by Park and another form of this receiver suggested earlier in the literature but not referenced in Park's paper. View full abstract»

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  • [Back cover]

    Publication Year: 1978, Page(s): 0
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    Freely Available from IEEE
  • Rehoming Strategies from an Existing Electromechanical to a Relief Electronic Switching System

    Publication Year: 1978, Page(s):1401 - 1404
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    When a relief toll switching system is used to alleviate the exhaust problem of an existing toll switching system of the same generic, type, a rehoming program (specifying amounts and timings of trunk rearrangements) is dictated primarily by the ratio of the monetary discount rate to the traffic growth rate. If this ratio is greater than unity, the rehoming strategy calls for a conservative progra... View full abstract»

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  • On Optimum Receivers for Analog Communication in Impulsive Noise

    Publication Year: 1978, Page(s):1446 - 1454
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    In this paper the problem of impulsive noise suppression in analog communication systems is considered. The problem of demodulation of amplitude and phase modulated signals in the presence of impulsive noise is formulated by introducing a binary random process to indicate the presence of impulsive noise. It is shown that sub-optimal receiver structures can be derived using this model and these are... View full abstract»

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  • Analog Viterbi Decoding for High Speed Digital Satellite Channels

    Publication Year: 1978, Page(s):1463 - 1470
    Cited by:  Papers (21)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    Analog means for implementing the Viterbi decoding algorithm at high data rates are presented. One approach employs sample-and-hold circuits and voltage adders to store and update the path metrics based upon maximum-likelihood decisions. Experimental results obtained from a breadboard realization of such a decoder are reported. An alternate approach employing tapped delay lines to store the analog... View full abstract»

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  • Experimental and Theoretical Assessment of Multipath Effects on QPSK

    Publication Year: 1978, Page(s):1475 - 1477
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Qualitative and quantitative agreement between experimental and theoretical results for binary error probability for a coherent QPSK system degraded by intersymbol interference is given. The source of intersymbol interference is a delayed and attenuated replica of the transmitted signal which may represent several forms of observed multipath. Although the experimental results pertain to a particul... View full abstract»

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  • Surge Propagation Characteristics on Submarine Repeatered Line

    Publication Year: 1978, Page(s):1421 - 1425
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Lightning and cable fault induces surge current on a coaxial cable repeatered line. The surge current front becomes more and more steep when passing through the repeaters. Larger surge current penetrates the amplifier in the repeater located further from the surge struck point compared with the amplifier in the repeater near upon the surge struck point. View full abstract»

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  • A 105 Mbit/s Error Correcting Codec

    Publication Year: 1978, Page(s):1426 - 1432
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    A 105 Mbit/s experimental error correcting encoder/ decoder is described. The device exhibits a coding gain of 1.9 dB at a 10-5bit error rate and has a 25 percent parity bit overhead. The decoder was constructed without syndrome reset. This allowed the operating speed to be more than doubled, while only sustaining a negligible loss in performance. View full abstract»

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  • Statistics of the First-Order Phase-Locked Loop with Fluctuating Signal Amplitude

    Publication Year: 1978, Page(s):1472 - 1474
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The phase error probability density of the first-order phase-locked loop is determined when the signal amplitude has a wideband noise component. The problem is solved using the Fokker-Planck equation. Use is made of the "correction term" for conversion from ordinary calculus to the Ito calculus model. Serious errors in previously published works are pointed out. View full abstract»

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  • Digital Standards Converter by Adaptive Intra-Frame Line Interpolation

    Publication Year: 1978, Page(s):1413 - 1420
    Cited by:  Papers (3)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    This paper introduces a new technique for TV standards conversion called "adaptive intra-frame line interpolation". The configuration and the performance of a digital converter developed by using the technique are also described. In the present converter, an input picture is divided into still and moving areas by measuring frame difference signals, and suitable interpolation parameters are adaptiv... View full abstract»

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  • Application of Fast Kalman Estimation to Adaptive Equalization

    Publication Year: 1978, Page(s):1439 - 1446
    Cited by:  Papers (218)  |  Patents (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    Very rapid initial convergence of the equalizer tap coefficients is a requirement of many data communication systems which employ adaptive equalizers to minimize intersymbol interference. As shown in recent papers by Godard, and by Gitlin and Magee, a recursive least squares estimation algorithm, which is a special case of the Kalman estimation algorithm, is applicable to the estimation of the opt... View full abstract»

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  • A Note on Measures of Voice Transmission Performance Used by the CCIR

    Publication Year: 1978, Page(s):1478 - 1480
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The articulation index (AI) described in CCIR Report 526 as a measure of voice intelligibility cannot adequately represent the effects of interfering signals on voice intelligibility. The minimum interference threshold (MINIT) described in the same report as a measure of voice transmission performance is not a performance measure. View full abstract»

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  • Orthogonal Transform Coding System for NTSC Color Television Signals

    Publication Year: 1978, Page(s):1454 - 1463
    Cited by:  Papers (12)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    A two-dimensional, 32nd-order orthogonal transform coding system which performs three types of transformations in realtime for NTSC color television signals has been developed. This paper reports on a hardware realization of this system, the optimum bitassignments for 32 and 22 Mbit/s transmission rates and the effects of bit errors during transmission. Through the evaluation of picture quality, t... View full abstract»

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Aims & Scope

IEEE Transactions on Communications focuses on all telecommunications including telephone, telegraphy, facsimile, and point-to-point television by electromagnetic propagation.

 

 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Naofal Al-Dhahir
University of Texas at Dallas