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IEEE Transactions on Communications

Issue 10 • October 1984

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

    Publication Year: 1984, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (198 KB)
    Freely Available from IEEE
  • Combined Random/Reservation Access for Packet-Switched Transmission Over a Satellite with On-Board Processing - Part II: Multibeam Satellite

    Publication Year: 1984, Page(s):1093 - 1104
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1060 KB)

    The idea of combining the desirable features of random access (at low utilization) and reservation access (at high utilization) motivated the proposal of a combined random/reservation multiple access (CRRMA) scheme for a global beam satellite described in [13] and a multispot beam satellite described and analyzed in this paper. A key element in the proposed CRRMA protocol is the assumption of an o... View full abstract»

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  • Performance Analysis of Networks with Unreliable Components

    Publication Year: 1984, Page(s):1105 - 1110
    Cited by:  Papers (107)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (566 KB)

    In evaluating the performance of a communication network with unreliable components, researchers have traditionally approached the problem by enumerating all possible states of the system. Since the number of states of a communication network withnfailure-prone components is 2nthese methods are restricted to small systems. We present a new solution technique that is not doome... View full abstract»

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  • Performance of OOK and Low-Order PPM Modulations in Optical Communications When Using APD-Based Receivers

    Publication Year: 1984, Page(s):1140 - 1143
    Cited by:  Papers (56)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (363 KB)

    This correspondence compares OOK and low-order PPM signaling formats in terms of bit error probabilities versus required signal counts per bit. The results show that QPPM requires 3 dB less signal than OOK, while BPPM requires the same or slightly more than OOK for the same performance. Optimum APD gain values are from 200 to 400. When using QPPM,k_{eff} = 0.006, and optimum gain, 60 si... View full abstract»

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  • Comments on "Diversity ALOHA"

    Publication Year: 1984, Page(s):1143 - 1145
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (279 KB)

    In a recent paper, a generalization of the slotted ALOHA random access scheme is considered in which a user transmits multiple copies of the same packet. In frequency diversity ALOHA, multiple copies of the same packet are simultaneously transmitted on different channels. We found the analysis for one of the proposed schemes, namely, channel selection without replacement, to be incorrect. These co... View full abstract»

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  • Author's reply

    Publication Year: 1984, Page(s): 1145
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (121 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1984, Page(s): 0
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    Freely Available from IEEE
  • Improved Pel-Recursive Motion Compensation

    Publication Year: 1984, Page(s):1128 - 1134
    Cited by:  Papers (73)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A pel-recursive motion estimation technique for television coding was introduced by Netravali and Robbins [1]. This method basically involves computing a motion displacement and then separating the pels into predictable and unpredictable segments. The addresses required to identify these segments and thus enable the motion estimation algorithm are transmitted along with pel error data. The origina... View full abstract»

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  • A Differential Technique for Detections of Circularly Polarized Satellite Signal Parameters

    Publication Year: 1984, Page(s):1135 - 1139
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    This paper presents fundamental concepts, operational principles, and typical experimental results of a differential technique for detections of circularly polarized satellite signal parameters at low axial ratios. The approach is to equip a rotating π-polarizer with an orthomode transducer in the antenna front end. A two-channel phase-locked receiver is used to detect the differential phase ... View full abstract»

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  • Algorithm for Construction of Variable Length Code with Limited Maximum Word Length

    Publication Year: 1984, Page(s):1157 - 1159
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    As a high efficiency coding method for TV signals, variable length coding, such as Huffman coding, is extremely effective. However, when this variable length coding is applied to an actual TV codec which requires high-speed real-time processing, maximum word length will be limited for the hardware configuration. This correspondence describes an algorithm for the construction of a modified Huffman ... View full abstract»

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  • An Aggregate Model for Network Modernization with Constraints

    Publication Year: 1984, Page(s):1073 - 1079
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A linear programming model has been formulated and implemented for modernization problems with constraints. The complexity of the model is studied analytically and empirically as a function of problem size. A heuristic has been specified and implemented for solving the same problem. The solutions obtained by the linear program and the heuristic are compared for a modernization problem of current i... View full abstract»

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  • A Class of Reduced-Complexity Viterbi Detectors for Partial Response Continuous Phase Modulation

    Publication Year: 1984, Page(s):1079 - 1087
    Cited by:  Papers (65)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    Partial response continuous phase modulation (CPM) gives constant envelope digital modulation schemes with excellent power spectra. Both narrow main lobe and low spectral tails can be achieved. When these signals are detected in an optimum coherent maximum likelihood sequence detector (Viterbi detector), power efficient schemes can also be designed, sometimes at the expense of receiver complexity.... View full abstract»

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  • A Second Modeling Approach to Year-to-Year Rainfall Variability in the USA for Microwave/Millimeter Wave Applications

    Publication Year: 1984, Page(s):1145 - 1148
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    Two methods for predicting year-to-year variability of rain rate are discussed. Results using one of the methods were presented in this TRANSACTIONS in May 1979. Contour maps illustrating the year-to-year standard deviation for the U.S.A., using the second method, are presented. A comparison of both methods with some observational data is included. View full abstract»

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  • ARQ with Sequential Decoding of Packetized Data: Queueing Analysis

    Publication Year: 1984, Page(s):1118 - 1127
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    The operation of a sequential decoder in a packet-switching environment is considered. Packets arrive randomly at the decoder, and a packet is stored in a buffer if the decoder is busy upon its arrival. The decoder devotes no more than a time-out period of predetermined length to the decoding of any single packet. If packet decoding is completed within that period, the packet leaves the system. Ot... View full abstract»

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  • On the Application of Importance Sampling to the Simulation of Digital Satellite and Multihop Links

    Publication Year: 1984, Page(s):1088 - 1092
    Cited by:  Papers (19)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    Importance sampling is one of the more useful techniques for reducing the number of samples required in Monte Carlo simulation. In the communication context, it has been applied and discussed in conjunction with single-hop digital systems. The purpose of this paper is to extend the method of application of importance sampling to multihop digital communication systems, with particular reference to ... View full abstract»

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  • Analytic Modeling of an Adapter to Local Area Networks

    Publication Year: 1984, Page(s):1111 - 1117
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A model of an adapter to a local area network is used to study the timing problem associated with the reception of back-to-back frames from a multiaccess transmission medium. The conditions under which frames are received successfully are presented. Analytic results are also obtained for the probabilities that frames are lost and a given number of back-to-back frames is successfully received. Nume... View full abstract»

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  • Absolute Moment Block Truncation Coding and Its Application to Color Images

    Publication Year: 1984, Page(s):1148 - 1157
    Cited by:  Papers (155)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1864 KB)

    A new quantization method that uses the criterion of preserving sample absolute moments is presented. This is based on the same basic idea for block truncation coding of Delp and Mitchell but it is simpler in any practical implementation. Moreover, output equations are those for a two-level nonparametric minimum mean square error quantizer when the threshold is fixed to the sample mean. The applic... 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