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IEEE Transactions on Communications

Issue 9 • September 1983

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

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • Frequency-Selective Fading Effects in Digital Mobile Radio with Diversity Combining

    Publication Year: 1983, Page(s):1085 - 1094
    Cited by:  Papers (128)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (997 KB)

    we analyze the effects of frequency-selective fading in a cellular mobile radio system that uses 1) phase-shift keying (PSK) with cosine rolloff pulses, and 2) space diversity with maximal-radio combining. The distorting phenomena with which we deal are multipath fading (which produces the frequency selectivity), shadow fading, and cochannel interference. The relevant quality measure is defined to... View full abstract»

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  • A Simple Method of Estimating Multipath Fade Model Parameters from Measurements on Existing Analog Links

    Publication Year: 1983, Page(s):1103 - 1109
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (458 KB)

    A theoretical analysis of the problem of estimating frequency selective fade model parameters from measurements on existing analog links is presented. These measurements essentially consist of obtaining records of AGC and continuity pilot level variations from which a first approximation ofa, alpha, omega_{0}, and τ (fade model parameters) can be obtained. Field results obtained on... View full abstract»

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  • Signal Sets with Optimal Correlation Properties

    Publication Year: 1983, Page(s):1109 - 1112
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Rowe has developed an upper bound on the number of vectors possible in ad-dimensional space, given that the vectors of the set are divided into orthogonal alphabets and subject to an appropriately defined root-mean-square correlation constraint Crms. Here, signal set design procedures are presented that are near optimal with respect to Rowe's upper bound. The specific paramet... View full abstract»

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  • Comments on "Optimal Retransmission Control of Slotted ALOHA Systems"

    Publication Year: 1983, Page(s): 1112
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (102 KB)

    A controlled Markov model of the slotted ALOHA system in which the control parameter is the retransmission probability and a set of controls is the interval [0, 1] is considered. Numerical results are presented which show that the policy which maximizes the system's expected packet flow per time slot is not optimal. It is shown that, although it is not optimal, this policy can be considerably bett... View full abstract»

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  • Correction to "Rejection of CW Interference in QPSK Systems Using Decision-Feedback Filters"

    Publication Year: 1983, Page(s): 1116
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (122 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • An Incremental Capacity-Allocation Algorithm for Voice/Data Networks

    Publication Year: 1983, Page(s):1113 - 1114
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    An algorithm is described by which TDM slots in many links of a network can be optimally allocated between voice and data. It is an adaptation of a convex-programming method due to Fox, by which a pool of resources is allocated to minimize a convex separable criterion function such as blocking probability for voice subject to a single convex separable constraint such as specified maximum mean dela... View full abstract»

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  • Interfade Interval Statistics of a Rayleigh-Distributed Wave

    Publication Year: 1983, Page(s):1114 - 1116
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This paper presents distributions of the intervals between fades measured on a hardware-simulated Rayleigh-fading mobile radio channel. For intervals between deep fades, these distributions take on a Poisson form. Measured results are in good agreement with a simple analytical model. Distributions for the intervals between shallower fades exhibit preferred durations caused by peaks in the Doppler ... View full abstract»

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  • A Systematic Methodology for Analyzing Security Threats to Interprocess Communication in a Distributed System

    Publication Year: 1983, Page(s):1055 - 1063
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    It is observed that a direct mapping exists between a distributed system's physical configuration and the security threats that can be mounted against interprocess communication in that system. A systematic methodology is presented which implements that mapping for a large class of distributed systems. The methodology includes a model of threats to interprocess communication as well as a model of ... View full abstract»

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  • Dynamic Scheduling Protocols for a Multiple-Access Channel

    Publication Year: 1983, Page(s):1046 - 1055
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    In this paper the multiple-access problem in a packet network is considered. A finite number of independent, packet transmitting users is assumed. Protocols are developed to allocate the channel resources among the users. Part of the channel capacity is assigned to control information. This information is used to make probabilistic inferences of the queue lengths and delay characteristics of the u... View full abstract»

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  • Decoding with Stretched Pulses in Laser PPM Communications

    Publication Year: 1983, Page(s):1037 - 1045
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The design and performance of optical PPM communication systems with ideal (rectangular) pulses have been well documented. However, many optical channels (fibers, atmosphere, clouds) are extremely dispersive to narrow pulses, producing receiver pulses that are spread (stretched) in time. This stretching produces interslot interference within a PPM frame, and if severe enough, can stretch over seve... View full abstract»

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  • A Class of Phase Detector Characteristics for Symbol Synchronizers Yielding Unbiased Estimates

    Publication Year: 1983, Page(s):1033 - 1036
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Most practical synchronizers operating on a PAM waveform corrupted by additive noise can be analyzed by means of the theory of the phase-locked loop (PLL). In this paper, we present a class of synchronizers for which the equivalent phase detector characteristic is such that the timing instants generated by the voltage controlled clock (VCC) are unbiased with respect to the ideal sampling instants ... View full abstract»

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  • Optimal Symbol-by-Symbol Detection for Duobinary Signaling

    Publication Year: 1983, Page(s):1077 - 1085
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    An optimal symbol-by-symbol detection scheme for duobinary signaling (Class I PRS) which exploits the inherent correlation properties of partial response signaling (PRS) is postulated. Analytical results indicate a maximum improvement of approximately 0.7 dB over conventional split shaping duobinary detection at a 10-4error rate. Although duobinary signaling is emphasized, sufficient ge... View full abstract»

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  • Design and Performance of WDM Transmission Systems at 6.3 Mbits/s

    Publication Year: 1983, Page(s):1095 - 1102
    Cited by:  Papers (12)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    One- and two-way 6.3 Mbit/s optical transmission systems employing wavelength-division-multiplexing (WDM) are designed for application to telephone networks. Multiplexing at two wavelengths, 1200 and 1300 nm, as well as that at 810 and 890 nm, is found to be effective after taking the application fields and present fabrication techniques for optical multiplexers into account. Requirements for opti... View full abstract»

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  • Synchronous and Channel-Sense Asynchronous Dynamic Group-Random-Access Schemes for Multiple-Access Communications

    Publication Year: 1983, Page(s):1063 - 1077
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1344 KB)

    Adaptive random-access schemes are introduced and analyzed to provide access-control supervision for a multiple-access communication channel. The dynamic group-random-access (DGRA) schemes introduced in this paper implement an adaptive GRA structure. An active terminal transmits its ready packet at random within the next specified time period. Colliding packets are retransmitted at a random slot w... View full abstract»

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  • A Simple Lower Bound on the Linearized Performance of Practical Symbol Synchronizers

    Publication Year: 1983, Page(s):1029 - 1032
    Cited by:  Papers (23)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    In this paper we present a lower bound on the linearized mean-square timing error resulting from a practical synchronizer estimating the delay of a baseband PAM waveform which is corrupted by stationary Gaussian noise. This lower bound is easily evaluated, and applies to a broad class of synchronizers. 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