By Topic

IEEE Transactions on Communications

Issue 2 • Date February 1985

Filter Results

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

    Publication Year: 1985, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (184 KB)
    Freely Available from IEEE
  • Double Loop Network Architectures - A Performance Study

    Publication Year: 1985, Page(s):185 - 187
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (315 KB)

    Single loop networks tend to become unreliable and suffer from poor performance when the number of nodes in the network becomes large. One approach to increasing reliability and improving performance is to use a double loop. In this paper, the performance (using analytical and simulation models) of a class of highly reliable double loop network architectures is presented. The richer topology of do... View full abstract»

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

    Publication Year: 1985, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (309 KB)
    Freely Available from IEEE
  • Computations of DSI (TASI) Overload as a Function of the Traffic Offered

    Publication Year: 1985, Page(s):188 - 190
    Cited by:  Papers (3)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    This paper presents an analysis of the performance of a digital speech interpolation (DSI) system as a function of the traffic offered to the system. We assume that the DSI overload degradation occurs as clipping or freezeout. This is identical to TASI freezeout. Unlike conventional analysis, which assumes all of the trunks entering the DSI system are busy all the time, we calculate the freezeout ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Simple Algorithm for the Control of Rearrangeable Switching Networks

    Publication Year: 1985, Page(s):169 - 171
    Cited by:  Papers (14)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    A simple algorithm for the control of rearrangeable switching networks \nu(n, n, r) is given. This algorithm makes it possible to compute the switch settings that implement a given Permutation. The algorithm takes serial time O(nr^{2}) and consists of one phase, i.e., it does not require iterations. The version of the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Role of AM-to-PM Conversion in Memoryless Nonlinear Systems

    Publication Year: 1985, Page(s):139 - 144
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A generalized proof is presented that AM-to-PM conversion can only degrade, never improve, the intermodulation-noise performance of memoryless nonlinear systems with random input signals having even probability density functions, and a measure of degradation is defined. It is also shown for such signals that AM-to-PM conversion causes a deterministic constant phase shift to be added to the argumen... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimum Linear Equalization in Digital Fiber-Optic Systems

    Publication Year: 1985, Page(s):158 - 168
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    We exhibit an optimum linear equalizer that maximizes the signal-to-noise ratio while mitigating the effects of intersymbol interference, in the case of dispersion limited operation of a digital fiber-optic transmission system. The simultaneous presence of signal-dependent noise, thermal noise, and blue noise reduces the problem to seeking a solution of an inhomogeneous linear second-order differe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Nonparametric Receiver for FH-MFSK Mobile Radio

    Publication Year: 1985, Page(s):178 - 184
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Various parametric receivers such as the maximum likelihood and the hard-limiter have been analyzed for their performance in decoding the frequency hopped multilevel FSK (FH-MFSK) messages in mobile environment. Here, some nonparametric receivers such as the maximum rank sum receiver (MRSR) and the reduced rank sum receiver (RRR) are considered. RRR and MRSR are nearly identical in performance but... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Class of Efficient Contention Resolution Algorithms for Multiple Access Channels

    Publication Year: 1985, Page(s):145 - 151
    Cited by:  Papers (66)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    A discrete time multiaccess channel is considered where the outcome of a transmission is either "idle," "success," or "collision," depending on the number of users transmitting simultaneously. Messages involved in a "collision" must be retransmitted. An efficient access allocation policy is developed for the case where infinitely many sources generate traffic in a Poisson manner and can all observ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Blocking Probability of Noninteger Groups with Trunk Reservation

    Publication Year: 1985, Page(s):113 - 120
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    A model for computing the blocking probability in circuitswitched networks operating with trunk reservation is extended to the case of noninteger trunk numbers. This generalization is required if the model is to be used in network optimization algorithms, which are generally evaluated over the reals. A simple extension is first presented, and shown to be numerically unstable over some values of th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Approximate Statistical Analysis of the Widrow LMS Algorithm with Application to Narrow-Band Interference Rejection

    Publication Year: 1985, Page(s):121 - 130
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The Widrow LMS algorithm is considered for the implementation of an adaptive prewhitening filter in a direct-sequence (DS) spread-spectrum receiver. Exact expressions for the steady-state tapweight covariance matrix and resulting average excess mean square error are developed for the real LMS algorithm when the input contains a random binary sequence (used to model a pseudonoise spreading sequence... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New Short Constraint Length, Rate 1/N Convolutional Codes Which Minimize the Required SNR for Given Desired Bit Error Rates

    Publication Year: 1985, Page(s):171 - 177
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    New, good ( K, 1/N ) convolutional codes are tabulated for 3 \leq K \leq 7 and 2 \leq N \leq 8 , which were selected based on the criterion of minimizing the required signal-to-noise ratio (SNR) for given desired bit error rates (BER). A transfer function upper bound was used to ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Properties of Frequency Difference Detectors

    Publication Year: 1985, Page(s):131 - 138
    Cited by:  Papers (59)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    Among other applications, frequency-tracking loops are employed in digital-data receivers, either as a frequency-acquisition aid for phase-locked coherent reception, or as the sole carrier-frequency control for noncoherent reception. This article provides details of design and performance of the frequency-difference detector that lies at the heart of the loop. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Condition for Stable Minimum-Bandwidth Line Codes

    Publication Year: 1985, Page(s):152 - 157
    Cited by:  Papers (18)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    By generalizing a concept on a power spectral zero at the Nyquist frequency, a condition for the line codes' capability to signal with the minimum bandwidth is established. From the condition, lower bounds of eyewidth are obtained for various values of a new system parameter called intersymbol interference sum variation (ISV). As an application of the condition, the nonminimum-bandwidth bipolar co... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Note on "Modulation Methods Related to Sine Wave Crossings"

    Publication Year: 1985, Page(s):177 - 178
    Cited by:  Papers (3)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    In this correspondence we show that the above paper is a rediscovery of what was known since 1973 [1]. The contents of the paper have been published in various forms in the literature. The more general case of a periodic wave crossing has already been considered, which covers the special case of a sine wave crossing. 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