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IEEE Transactions on Communications

Issue 6 • Date June 1976

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

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1976, Page(s): 577
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Algorithms for Delayed Encoding in Delta Modulation with Speech-Like Signals

    Publication Year: 1976, Page(s):652 - 658
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    This concise paper is concerned with the problem of improved delta-coding by using delayed decision instead of bit-bit-by-bit decision. It is found that delayed encoding allows a fairly general predictor to be used without causing instability problems. Simulations indicate that considerable improvement can be achieved by matching the feedback filter to the input process. Delayed encoding requires ... View full abstract»

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  • Structurally Constrained Receivers for Signal Detection and Estimation

    Publication Year: 1976, Page(s):578 - 592
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1256 KB)

    A general approach to the problem of designing structurally constrained receivers for signal detection and estimation is proposed. The approach is based on the constrained Bayesian methodology wherein risk-minimizing inference (or decision) rules are modified (constrained) by replacement of true posterior probabilities with estimated posterior probabilities. The estimators are structurally constra... View full abstract»

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  • Influence on Packet Node Behavior of the Internode Protocol

    Publication Year: 1976, Page(s):606 - 614
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    Basic node-to-node protocol of a packet-switched network based on the multiplexing of the link into N logical channels is first described. The node structure is then described based on a set of queues, an input routine, a main-task routine, and an output routine. Three protocols which are based on different implementations of the transmission of the acknowledgm... View full abstract»

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  • A Methodology for the Design and Implementation of Communication Protocols

    Publication Year: 1976, Page(s):614 - 621
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    This paper presents a coherent method which permits the specification, check out, and implementation of communication protocols. Although this work is mainly directed towards telephone signaling in a programmable environment, the philosophy and most of the tools can be effectively used to handle the most general situations in which two entities interact by any kind of protocol. Since the proposed ... View full abstract»

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  • A Statistical Analysis of Transmit Power Control to Compensate Up- and Down-Link Fading in an FDMA Satellite Communications System

    Publication Year: 1976, Page(s):622 - 636
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    The application of 14/12 GHz and higher allocated frequency bands in commercial satellite communications systems has been retarded by the problem of slow deep fading due principally to rain attenuation on the earth-station-to-satellite and satellite-satellite-to-earthstation radio links. The large carrier-to-noise ratio (C/N) margins required to ensure good ... View full abstract»

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  • Symbol Error Probabilities for M-ary CPFSK: Coherent and Noncoherent Detection

    Publication Year: 1976, Page(s):644 - 652
    Cited by:  Papers (36)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Continuous-phase frequency shift keying (CPFSK) is discussed and theoretical predictions for symbol error probabilities are derived, where the memory inherent in the phase continuity is used to improve performance. Previously known results concluded that binary CPFSK can outperform coherently detected PSK at high SNR. New results presented here show that M -ary... View full abstract»

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  • Convolutional Code Performance in the Rician Fading Channel

    Publication Year: 1976, Page(s):592 - 606
    Cited by:  Papers (56)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1248 KB)

    The performance of short constraint length convolutional codes in conjunction with binary phase-shift keyed (BPSK) modulation and Viterbi maximum likelihood decoding on the classical Rician fading channel is examined in detail. Primary interest is in the bit error probability performance as a function of E_{b}/N_{0} parameterized by the fading channel parame... View full abstract»

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  • Transmission Planning in International Telephony

    Publication Year: 1976, Page(s):658 - 660
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A framework for controlling transmission quality of international connections is the joint responsibility of CCITT Study Groups XII, XV, XVI and Special D. These study groups recommend rating methods, overall performance objectives, network plans, and equipment characteristics. Still closer cooperation may help to avoid unnecessary regional differences in equipment standards, as in today's PCM mul... View full abstract»

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  • Improving the Throughput of an ARQ Stop and Wait Scheme for Burst Noise Channels

    Publication Year: 1976, Page(s):661 - 663
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The repeat request codeword in an ARQ data transmission can be the detected error syndrome. In that case, there exists an optimal single-burst detecting scheme which improves the throughput of a Stop and Wait scheme, especially under high error rate conditions. View full abstract»

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  • Phase-Locked Loops with Signal Injection for Increased Pull-In Range and Reduced Output Phase Jitter

    Publication Year: 1976, Page(s):636 - 644
    Cited by:  Papers (28)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    Second-order phase-locked loops with signal injection (PLLI's) have orders of magnitude larger pull-in ranges than conventional second-order PLL's with identical natural frequencies and damping factors. The PLLI utilizes a little-known characteristic of the Van der Pol oscillator, and for practically no additional hardware the pullin range is increased sufficiently to eliminate in many cases the n... View full abstract»

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  • Performance Prediction for Short-Range Troposcatter Links

    Publication Year: 1976, Page(s):670 - 672
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    This correspondence presents a modification to the Bello single-integral troposcatter channel model. The objective of the modification is to improve the model's ability to accurately predict the delay power spectrum of troposcatter paths of less than 150 mi. The model was modified by treating the scatter-angle exponent as a function of path length rather than a constant. The data from six shortran... View full abstract»

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  • Further Studies of Soft Decision Error Detectors for the Gaussian Channel

    Publication Year: 1976, Page(s):664 - 670
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    This correspondence is an extension of the work in [1] and [2]. We present two new classes of error detectors which utilize symbol reliability information (i.e., soft decision error detectors). First, a simple class of selectively single error correcting error detectors is discussed where the syndrome information is used and where just one single reliability number is compared to a threshold value... 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