Scheduled System Maintenance
On Friday, October 20, IEEE Xplore will be unavailable from 9:00 PM-midnight ET. We apologize for the inconvenience.
Notice: There is currently an issue with the citation download feature. Learn more.

IEEE Transactions on Communications

Issue 1 • January 1979

Filter Results

Displaying Results 1 - 25 of 41
  • [Front cover and table of contents]

    Publication Year: 1979, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (203 KB)
    Freely Available from IEEE
  • A Hybrid of Erlang B and C Formulas and Its Applications

    Publication Year: 1979, Page(s):59 - 68
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (946 KB)

    This paper attempts to broaden the usefulness of existing Erlang grade of service formulas, especially when faced with the evolving extensive changes in telephone networks. The old Markov traffic arrival and Markov call duration (or service) models are combined with what may be called more realistic user behavior and network scenarios. For the specified service system models, a generalized merger ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Differential PCM Systems

    Publication Year: 1979, Page(s):82 - 93
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (926 KB)

    Matched differential PCM systems are analyzed for stationary first order Gauss Markov process inputs. The computational procedure yields convergent solutions for the variance and the probability density function of the point-wise error for all sampling intervals. Time average error between the input signalX(t)and a time continuous estimateXhat{approx}(t)is computed and it is ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modulation Transfer from TDMA On-Off Bursting to FM Carriers in Memoryless Nonlinear Devices: Part I - Power Spectra

    Publication Year: 1979, Page(s):94 - 100
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (538 KB)

    The modulation transfer noise caused by the "on-off" bursts of TDMA signals is modeled and analyzed in detail. Expressions of the power spectra of the RF and the baseband modulation transfer noise have been obtained for the most general case ofLTDMA andNFM carriers in a zero-memory nonlinear amplifier such as a helix-type TWTA. From these general expressions, the RF power spe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Approximate Analysis of General Queuing Networks by Decomposition

    Publication Year: 1979, Page(s):113 - 126
    Cited by:  Papers (218)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1150 KB)

    In this paper an approximate method for the analysis of general queuing networks is proposed. The queuing network is of the open network type, havingNsingle server queuing stations with arbitrary interconnections. Customers may enter the network at any queuing station. The interarrival times of the exogenous arrival processes and the service times at the queuing stations are generally d... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Congestion Control of Store-and-Forward Networks by Input Buffer Limits - An Analysis

    Publication Year: 1979, Page(s):127 - 134
    Cited by:  Papers (72)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (806 KB)

    The use of input buffer limits for congestion control of store-and-forward networks is investigated. An analytic model is formulated. Based upon the analytic results, strategies are proposed for the design of input buffer limits to achieve the maximum network throughput as well as to provide a safety margin for uncertainties in traffic assumptions. A useful capacity law is discovered. Major conclu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance Analysis of Optical Receivers by the Saddlepoint Approximation

    Publication Year: 1979, Page(s):186 - 191
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (545 KB)

    Determining the minimum error probability of a binary communication receiver embodying a photoelectric detector requires calculating both the probability pkthatkoutput electrons are counted and the cumulative probability that the numberkexceeds a certain decision level. A saddlepoint method is described for both setting the decision level and approximating the erro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Filter Parameter Optimization for Linear and Nonlinear BPSK Transmission

    Publication Year: 1979, Page(s):191 - 197
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    The parameter optimization of practical filters for baseband equivalents of linear and nonlinear BPSK transmission systems is investigated. An estimate of system error rate is defined and this is minimized. Here the received signal is detected in the presence of intersymbol interference and white Gaussian noise. A closed form expression for receiverBTproduct minimizing mean-square disto... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Signal-to-Noise Ratio Evaluations for Nonlinear Amplifiers

    Publication Year: 1979, Page(s):197 - 201
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    This paper presents a solution for the output signal-to-noise ratio of a bandpass nonlinearity which is attractive for numerical evaluations of certain nonlinearities of interest. The solution is obtained by solving a differential equation which results in an expression for thenth order Chebyshev transform of an odd-order nonlinearity in terms of the(n - 1)st-order Chebyshev ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Characteristics of Manchester-Coded FSK

    Publication Year: 1979, Page(s):209 - 216
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (582 KB)

    In this paper, the Manchester-coded frequency-shift-keyed (MCFSK) signal is shown to be representable in terms of an in-phase(I)and a quadrature(Q)carrier term. TheI-term carries the bit timing and theQ-term carries the message information. Based on this representation, a simple derivation of the power spectral density for MCFSK is presented. The effect ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • K-Band Satellite Regenerative Relay Systems Using Multihorn Antenna with Variable Power Combiners/Dividers

    Publication Year: 1979, Page(s):233 - 240
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    The effects on CNR improvements are described for aK-band PCM-TDMA regenerative satellite relay system, using a multihorn antenna, whose horn powers are combined/divided with variable power combiners (VPCs)/dividers (VPDs). In conclusion, when the VPCs combination/VPDs division ratios are controlled according to the criterion maximizing the sum of uplink/downlink rain margins, both effi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Further Comments on "VHF and UHF Links Using Mountains as Reflectors"

    Publication Year: 1979, Page(s):255 - 256
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comments on "VHF and UHF Links Using Mountains as Reflectors"

    Publication Year: 1979, Page(s): 255
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (111 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Authors' reply

    Publication Year: 1979, Page(s): 256
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • [Back cover]

    Publication Year: 1979, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (401 KB)
    Freely Available from IEEE
  • Increasing the Capacity of the No. 4A Crossbar

    Publication Year: 1979, Page(s):30 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    The capacity of switching networks in carried load is limited by the percentage of calls which fail to find a path (matching loss). Clean, reliable data on carried load and first and second trial matching loss have recently been made available. These data, from a heavily loaded No. 4A Crossbar System, have been analyzed to find the effect of load balance and have been compared with theoretical pre... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Concerning the Recovery of a Bandlimited Signal or Its Spectrum from a Finite Segment

    Publication Year: 1979, Page(s):251 - 252
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The relationship between the iterative techniques of Sandberg and Papoulis is clarified. The conditions of Sandberg's theorem are not satisfied in general when the problem is that of extrapolating a bandlimited signal outside of a known segment (a problem that is "illposed"). For an interesting special case, the iteration may be applied and the signal recovered exactly. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of Multipath Outage with Applications to 90-Mbit/s PSK Systems at 6 and 11 GHz

    Publication Year: 1979, Page(s):68 - 75
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    An analytical study to predict multipath fading outages in terrestrial digital radio systems is described. The method, which is quite general, makes specific use of previously reported statistics on multipath fading. It is applied, in this study, to 6- and 11-GHz systems carrying 90 Mbits/s per RF channel. For purposes of comparing alternate approaches, three different modulations are considered, ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Decomposition of Traffic in Loss Systems with Renewal Input

    Publication Year: 1979, Page(s):44 - 58
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1440 KB)

    A method is proposed for the analysis of a teletraffic network with alternative routing. The approach used is to model a "general link" as a separate entity, being a first step towards analyzing the network in a link-by-link fashion. To this end the general link is considered to be a group of fully available trunks offered a number of separate streams of traffic. By considering the multivariate po... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the Reduction of Hardware in Digital Modulators

    Publication Year: 1979, Page(s):221 - 228
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    A Possible simplification of digital modulation (carrier multiplication with sine or cosine signal) is discussed. Using the fact that samples of a sine (or cosine) function are periodic under certain circumstances, a novel implementation is proposed. Depending on the ratio of sampling and carrier frequencies this implementation can lead to a reduction of cost in comparison with usual methods of im... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis and Simulation of No. 4 ESS Network Performance

    Publication Year: 1979, Page(s):1 - 9
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (984 KB)

    No. 4 ESS is a newly developed, high capacity toll switching machine with a maximum of 107,000 4-wire terminations. Call switching is accomplished via a large digital time-division switching network. The network was evaluated both by a full scale simulation study and by analytical methods to determine its performance characteristics, that is, its blocking and switching capacity. In both simulation... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Effect of Call Routing Rules in Non-Blocking Three-Stage Switching Networks

    Publication Year: 1979, Page(s):150 - 152
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Sequential hunting and call packing rules are discussed as they are used to route calls in a non-blocking symmetric 3-stage netWork. It is shown that the Clos bound is met with both procedures, for most network parameter values. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High Order Algorithms for Adaptive Filters

    Publication Year: 1979, Page(s):216 - 221
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Faster convergence of adaptive filters has been of particular interest in the areas of adaptive equalizers and adaptive antennas. The algorithm most frequently suggested is some variation of the firstorder gradient-descent LMS algorithm. This paper investigates a general procedure for the design of higher-order algorithms. Convergence of the mean weight vector and the variance is compared for thre... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal Quantization of the Rayleigh Probability Distribution

    Publication Year: 1979, Page(s):101 - 112
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    We have derived an efficient and general algorithm for optimal quantization and applied it to the important, but neglected Rayleigh random variable. The optimal quantization range and output levels for the distortion criterion of minimum mean squared error have been calculated and tabulated for numbers of output levels from 1 to 64. We also compute and report the corresponding distortions and outp... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal Distributed Routing for Virtual Line-Switched Data Networks

    Publication Year: 1979, Page(s):201 - 209
    Cited by:  Papers (31)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    An algorithm that provides minimum delay routing in a data communication network using virtual line-switching is presented. The algorithm uses distributed computation in the sense that the nodes of the network update their information in an orderly fashion based on messages received from their neighbors. Receipt of these messages also triggers the various steps of the update and rerouting, so that... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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