IEEE Transactions on Communications

Issue 10 • October 1983

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Displaying Results 1 - 14 of 14
  • [Front cover and table of contents]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • A Spread-Spectrum Concept Combining Chirp Modulation and Pseudonoise Coding

    Publication Year: 1983, Page(s):1133 - 1142
    Cited by:  Papers (26)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1209 KB)

    This paper investigates the combination of chirp modulation and pseudonoise phase shift keying for spread-spectrum transmission of digital data. Data encoding is accomplished by assignment of positive and negative dispersive slope chirps for binary ones and zeros. Each chirp is then modulated by one period of a PN signature sequence. The performance in additive white Gaussian noise is analyzed, me... View full abstract»

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  • An Algorithm for Optimal Route Selection in SNA Networks

    Publication Year: 1983, Page(s):1154 - 1161
    Cited by:  Papers (82)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (947 KB)

    The problem of selecting a single route for each class of service and each pair of communicating nodes in an SNA network is considered. The nodes, links, sets of candidate routes, and traffic characteristics are given. The goal is to select a set of routes which minimizes the expected network end-to-end queueing and transmission delay. Queueing is modeled as a network ofM/M/1queues whic... View full abstract»

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  • Combined Random/Reservation Access for Packet Switched Transmission Over a Satellite with On-Board Processing: Part I - Global Beam Satellite

    Publication Year: 1983, Page(s):1161 - 1171
    Cited by:  Papers (28)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (950 KB)

    A combined random/reservation multiple access (CRRMA) scheme for packet-switched communication over a global beam satellite with on-board processing is proposed and analyzed. Channel time is divided into contiguous slots; each slot containsNminislots for transmission of request packets andN'minislots for data. WithNsubstantially smaller than the number of earth sta... View full abstract»

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  • Performance of Frame Sync Acquisition Algorithms on the AWGN Channel

    Publication Year: 1983, Page(s):1196 - 1201
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (519 KB)

    Performance of the threshold coherent frame sync acquisition (TCFSA) algorithm on the AWGN channel is analyzed and compared with the performance of the algorithm for the BSC. Cases both with and without binary phase ambiguity are considered. Analytical and simulation results are presented and the agreement between the two is shown to he very close. It is shown that the threshold frame sync acquisi... View full abstract»

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  • [Back cover]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • Equivalent Model of a Clock Recovery Circuit

    Publication Year: 1983, Page(s):1187 - 1195
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (848 KB)

    In previous work a jitter model has been used to predict the growth of the timing errors along a chain of PCM regenerators. According to this model each regenerator behaves as a combination of a low-pass filter and a source of noise. The former accounts for the smoothing effect of the time constants of the regenerator, and the latter represents timing errors associated with the clock recovery proc... View full abstract»

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  • Adaptive A/D Converter to Suppress CW Interference in DSPN Spread-Spectrum Communications

    Publication Year: 1983, Page(s):1117 - 1123
    Cited by:  Papers (44)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (712 KB)

    The non-Gaussian nature of CW interference is exploited to suppress the CW via the A/D converter following chip demodulation in a direct sequence pseudonoise (DSPN) communication link. The modulation is coherent BPSK. The A/D converter quantizes to 2 bits, sign and magnitude. A scheme of threshold adaptation and postquantization weighting gains great advantage from making very reliable decisions o... View full abstract»

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  • An Estimate for the Time Congestion for Overflow Processes

    Publication Year: 1983, Page(s):1202 - 1203
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (136 KB)

    The paper presents an estimate of time congestion for overflow process. The approximation is derived from the Markovian formulation under classical assumptions (Poissonian traffic offered to the first choice route and exponential service time). Numerical experiments show the accuracy and the limitations of the proposed estimate. View full abstract»

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  • Performance of ARQ with Sequential Decoding Over One-Hop and Two-Hop Radio Links

    Publication Year: 1983, Page(s):1172 - 1180
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (584 KB)

    The stop-and-wait ARQ protocol with convolutional code and sequential decoding is considered. The channel throughput and optimum time-out before retransmission are obtained and the effects of the link parameters discussed. The results are extended to a twohop radio link, where a repeater receives the source's data and forwards them on the same radio channel to the destination. The ARQ protocols fo... View full abstract»

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  • Performance Bounds for Convolutional Codes with Digital Viterbi Decoders in Gaussian Noise

    Publication Year: 1983, Page(s):1124 - 1132
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (752 KB)

    With digital implementations of the Viterbi decoding algorithm for convolutional codes, soft quantization is preferred over hard quantization because it generally yields superior performance. Since the decoder needs to know the signal energy and channel noise variance with soft quantization, inaccurate information can result in a mismatch between the channel and decoder. Bounds which are tight for... View full abstract»

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  • A Multibeam Packet Satellite Using Random Access Techniques

    Publication Year: 1983, Page(s):1143 - 1154
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1104 KB)

    The performance of a multibeam packet satellite using ALOHA type random access techniques is studied. The satellite provides either no buffer or an infinite buffer for successful packets on the uplink channels. A TDMA frame is organized in accordance with the traffic demand from each area. System throughput and packet delay have been successfully obtained. Aiming at improving the performance of th... View full abstract»

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  • Self-Noise Spectral Measurements in Clock Synchronizers

    Publication Year: 1983, Page(s):1204 - 1207
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (384 KB)

    Data derived synchronization is plagued by self-noise arising from the randomness of the data stream. Experimental spectrum plots of the in-phase and quadrature self-noise components are given for various channel bandwidth and prefiltering conditions and different types of nonlinear devices. Results bring up features not covered by available theoretical analysis. View full abstract»

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  • Distribution and Equalization of Signal on Coaxial Cables Used in 10 Mbit/s Baseband Local Area Networks

    Publication Year: 1983, Page(s):1181 - 1186
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (904 KB)

    A time-domain skin-effect model is used to analyze the tapped coaxial cable. The paper first presents the step response of a coaxial cable with a single tap in the middle. Very good agreement has been obtained between the calculated and the measured results. The model is then applied to the study of a 500 m coaxial cable used in the 10 Mbit/s baseband local area networks. In order to compensate fo... 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