IEEE Transactions on Communications

Issue 7 • July 1983

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

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • Signaling Performance Over a Piecewise Linear Limited Channel in the Presence of Interference and Gaussian Noise

    Publication Year: 1983, Page(s):861 - 870
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (829 KB)

    Presented here are a model and the analysis for evaluating bit error probability of a BPSK signal transmitted through a band-limited piecewise linear (PWL) limited satellite channel subject to continuous wave (CW) interference as well as additive Gaussian noise. The CW interference is assumed to have a random phase over (0, 2pi) and a fixed frequency fjwhich may be either in ... View full abstract»

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  • DPCM Quantization of Color Television Signals

    Publication Year: 1983, Page(s):927 - 932
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (735 KB)

    The application of DPCM to the coding of color television signals calls for the design of the quantization characteristics for the luminance and the two color difference components. In this paper we describe quantizer designs based on visibility thresholds of quantization noise measured as a function of prediction error for a number of test slides. We assume a quantizer for the luminance component... View full abstract»

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  • [Back cover]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • A Reliable Broadcast Protocol

    Publication Year: 1983, Page(s):896 - 901
    Cited by:  Papers (31)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    Broadcast in a communication network is the delivery of copies of messages to all nodes. A broadcast protocol is reliable if all messages reach all nodes in finite time, in the correct order and with no duplicates. The present paper presents an efficient reliable broadcast protocol. View full abstract»

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  • Spectral Dispersion of Modulated Signals Due to Oscillator Phase Instability: White and Random Walk Phase Model

    Publication Year: 1983, Page(s):886 - 895
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    This paper considers the modeling of oscillator phase instability and the resulting spectral dispersion. A phase covariance matrix method is developed for determining the autocorrelation function and the power spectral density of the oscillator sinusoidal RF signal when corrupted by a superposition of a white phase random process and a random walk phase random process. By limiting the discussion t... View full abstract»

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  • Pulse Shape Design for Teletext Data Transmission

    Publication Year: 1983, Page(s):871 - 878
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    This paper studies the problem of designing a suitable pulse shape for teletext data transmission. The following four criteria are used: 1) Nyquist I criterion, 2) Nyquist II criterion, 3) degree of overshoots in the channel signal, and 4) robustness to sampling phase jitter. For system bandwidths less than the inverse-baud rate, it is not possible to satisfy all these criteria simultaneously; tra... View full abstract»

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  • Implementation of a Two-Channel LPC Vocoder

    Publication Year: 1983, Page(s):907 - 916
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    In this paper we describe hardware implementation of a 2400 bit/s two-channel linear predictive vocoder. The vocoder hardware uses the latest 2900 series "bit slice" microprocessor chips, and 2K RAM's and 1K ROM's of data memory. The system design is a two bus structure with a 208 ns cycle time. A significant feature of the vocoder is that it is capable of processing two voice channels simultaneou... View full abstract»

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  • Upper Bounds on the Partial Correlation of PN Sequences

    Publication Year: 1983, Page(s):917 - 922
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Upper bounds on the worst case autocorrelation and the worst case cross correlation of linear PN sequences of the same period are obtained. The value of the worst case correlation curve at some specific points is found and using interpolation methods a smooth curve fitting to the correlation curve is formulated. View full abstract»

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  • Optimization of Binary Transversal Filters

    Publication Year: 1983, Page(s):936 - 938
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    This paper presents a method for optimization with respect to bandwidth efficiency for a binary transversal filter when the input pulse format is NRZ. The objective is to concentrate as much as possible of the energy in the emitted signal within certain frequency bands. The filter coefficients are given by a symmetric eigenvector for a Toeplitz matrix, and the corresponding eigenvalue equals the o... View full abstract»

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  • Filtering Allocation in Teletext Data Transmission Under Power and Peak Constraints

    Publication Year: 1983, Page(s):933 - 935
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Various pulse shapes have been proposed for teletext data transmission. The effect of apportioning the different pulse shapes between the transmitter and the receiver is studied for the cases of a constraint on the power and a constraint on the peak value of the channel signal. View full abstract»

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  • A Fast Noniterative Method for Adaptive Channel Equalization

    Publication Year: 1983, Page(s):922 - 927
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    The noniterative method of adaptive channel equalization proposed by Butler and Cantoni [1] is investigated. Its start-up time is improved remarkably by choosing the period of the training sequence judiciously and performing the estimation of channel parameters exactly over one period. The resulting version of the algorithm is as fast as the fastest known iterative algorithms, such as Godard's Kai... View full abstract»

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  • Enhanced Receivers for Nonoptimally Allocated Filtering

    Publication Year: 1983, Page(s):879 - 885
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    For a raised cosine pulse spectrum with pulse shaping fully at the transmitter, several enhanced receivers for pulse amplitude modulation are presented which recover some of the 1.76 dB SNR lost due to nonmatched filtering reception. Three receivers using concepts such as double-the-symbol-rate sampling, the partial response-type property of the pulse, and soft decisions are analyzed; they recover... View full abstract»

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  • Spectral Analysis of Functions of Markov Chains with Applications

    Publication Year: 1983, Page(s):853 - 861
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    This paper deals with the spectral analysis of digital processes obtained through memoryless functions of stationary Markov chains. Under the assumption that the Markov chain is ergodic, not necessarily acyclic, closed form formulas are derived for both the discrete part (spectral lines) and the continuous part of the spectral density. The results are applied at the output of a finite state sequen... View full abstract»

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  • Improvements of Television Picture Quality by Eliminating the Disturbances Caused by Interlaced Scanning

    Publication Year: 1983, Page(s):902 - 906
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    Interlaced scanning is an effective technique to transmit pictures, but it causes an inherent disturbance in interlaced scanning (interlace disturbance) and deteriorates the picture quality. Recent developments of television signals and picture monitors have increased the interlace disturbance. A dual-beam display method which does not produce the interlace disturbance was constructed. By this app... 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