By Topic

IEEE Transactions on Communications

Issue 1 • Date January 1985

Filter Results

Displaying Results 1 - 18 of 18
  • [Front cover and table of contents]

    Publication Year: 1985, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (190 KB)
    Freely Available from IEEE
  • Closed-Form Analytical Results for the Rejection of Narrow-Band Interference in PN Spread-Spectrum Systems - Part II: Linear Interpolation Filters

    Publication Year: 1985, Page(s):10 - 19
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (817 KB)

    The performance of PN spread-spectrum communication systems in the presence of narrow-band interference is studied when linear interpolation filters are employed for the estimation and subsequent suppression of the interference. Closed-form analytical expressions for the system's performance are established for a broad class of interference processes. The advantages of linear interpolation filters... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Block Distortion in Orthogonal Transform Coding - Analysis, Minimization, and Distortion Measure

    Publication Year: 1985, Page(s):90 - 96
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1058 KB)

    Psychophysical considerations show that the block-shaped distortion peculiar to orthogonal transform coding (OTC) is ten times more objectionable than random noise distortion. Minimizing the blockshaped distortion is considered here by analyzing the process of generation of coding errors, and the required characteristics of the orthogonal transform function (OTF) are clarified. Computer simulation... 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
    Cited by:  Papers (1)
    Request permission for commercial reuse | PDF file iconPDF (380 KB)
    Freely Available from IEEE
  • A Note on Contention with Reference to Communication Networks

    Publication Year: 1985, Page(s):103 - 104
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    In this paper we give a solution to a contention problem with reference to communication networks. A and B simultaneously try to access a communication channel. They attempt access again at some later time chosen at random. From what probability density function should the time be chosen to minimize conflict? They are not a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Matrix Representation of CSMA/CD Networks

    Publication Year: 1985, Page(s):53 - 64
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1360 KB)

    A continuous time Markov chain model of asynchronous, nonpersistent CSMA/CD networks is developed which allows their complete characterization by a matrix whose dimensions are independent of the number of users in the network. The model provides an efficient reeursive algorithm for computing the performance of finite population networks. It also allows many analytical results to be obtained when a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Serial MSK-Type Detection of Partial Response Continuous Phase Modulation

    Publication Year: 1985, Page(s):44 - 52
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Partial response continuous phase modulation (CPM) schemes have a high spectrum utilization and also a high immunity to nonlinear distortion, since they have a constant envelope. Schemes with high power efficiency can also be designed when they are coherently detected with a Viterbi detector. These schemes are sometimes complex, however. In this paper two minimum-shift-keyed (MSK)type receivers ar... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Algorithm for the Design of Labeled-Transition Finite-State Vector Quantizers

    Publication Year: 1985, Page(s):83 - 89
    Cited by:  Papers (85)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    A finite-state vector quantizer (FSVQ) is a switched vector quantizer where the sequence of quantizers selected by the encoder can be tracked by the decoder. It can be viewed as an adaptive vector quantizer with backward estimation, a vector generalization of an AQB system. Recently a family of algorithms for the design of FSVQ's for waveform coding application has been introduced. These algorithm... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Echo Cancellation of Voiceband Data Signals Using Recursive Least Squares and Stochastic Gradient Algorithms

    Publication Year: 1985, Page(s):65 - 73
    Cited by:  Papers (29)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The convergence properties of adaptive least squares (LS) and stochastic gradient (SG) algorithms are studied in the context of echo cancellation of voiceband data signals. The algorithms considered are the SG transversal, SG lattice, LS transversal (fast Kalman), and LS lattice. It is shown that for the channel estimation problem considered here, LS algorithms converge in approximately View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On The Equivalence of Time-Division and Frequency-Division Multiplexing

    Publication Year: 1985, Page(s):97 - 99
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    On the basis of a general sampling formula it is shown that, for a system of n band-limited signals, FDM and band-limited TDM are equivalent in the sense that one can be derived from the other by a simple linear transformation. The transformation matrix is the same as for expanding an arbitrary polyphase system with n phases... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis and Optimization of Correlative Code-Tracking Loops in Spread-Spectrum Systems

    Publication Year: 1985, Page(s):30 - 43
    Cited by:  Papers (82)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    The purpose of this paper is to apply the renewal theory approach for analyzing aperiodic finite S -curve code-tracking loops developed by Meyr [9] to the case of a noncoherent, arbitrary offset, early-late, delay-locked loop ("noncoherent δ-DLL"). The exact (renewal) approach is compared to the approximate (periodic-extension) approach of using the period... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Individual Traffic Characteristics Queueing Systems with Multiple Poisson and Overflow Inputs

    Publication Year: 1985, Page(s):1 - 9
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    A theoretical method for analyzing overflow problems in queueing systems is presented. An interrupted Poisson process (IPP) approximation of overflow traffic is employed. An overflow stream is replaced by an IPP using the three-moment matching method. For a three-input model, to which one Poisson and two IPP streams are offered simultaneously, explicit and iterative formulas are derived to calcula... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Backward Adaptive Lattice and Transversal Predictors in ADPCM

    Publication Year: 1985, Page(s):74 - 82
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    Four different backward adaptive predictors and a fixed predictor are compared for use in an adaptive differential pulse code modulation (ADPCM) system for coding speech at 16 kilobits/second (kbits/s). For noise-free channels, the four adaptive predictors, a least squares lattice, a least mean square lattice, a Kalman transversal form, and a gradient transversal form, all exceed the fixed predict... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Simpler Approach to "Analysis of Integrated Voice/Data Multiplexing"

    Publication Year: 1985, Page(s):104 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    This paper gives a conceptually and algorithmically much simpler method for the model of a moving-boundary, fixed frame length, integrated multiplexor of the above paper. The method uses a Markov chain to obtain H_{[0,R]} and H_{R+t,s} , which can then be used to solve for the same joint distributions of queue length a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Convolutional Coding Combined with Continuous Phase Modulation

    Publication Year: 1985, Page(s):20 - 29
    Cited by:  Papers (80)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    Background theory and specific coding designs for combined coding/modulation schemes utilizing convolutional codes and continuous-phase modulation (CPM) are presented. In this paper the case of r = 1/2 coding onto a 4-ary CPM is emphasized, with short-constraint length codes presented for continuous-phase FSK, double-raised-cosine, and triple-raised-cosine m... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Bandwidth Efficient Quadrature Overlapped Squared Raised-Cosine Modulation

    Publication Year: 1985, Page(s):101 - 103
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    This correspondence describes staggered quadrature overlapped squared raised-cosine (QOSRC) modulation. The power spectrum of QOSRC attains good spectral characteristics over a bandpass hardlimited channel compared to quadrature overlapped raised-cosine (QORC) modulation because of less fluctuation of the signal envelope. It is found that QOSRC has better bit error probability performance than QOR... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Measured Frequency Diversity Improvement for Digital Radio

    Publication Year: 1985, Page(s):106 - 109
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    This paper presents the measured frequency diversity improvement factor for 6 GHz 16-QAM 90 Mbit/s digital radio on the 26.4 mi Atlanta-Palmetto path in Georgia. Two channels with a center frequency separation of 59.3 MHz were used in a one-by-one frequency diversity experiment. The 1980 data and the 1982 data indicate a frequency diversity improvement factor of 100 and 45, respectively, at the ou... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the Spectral Skewness of a Narrow-Band Gaussian Process

    Publication Year: 1985, Page(s):99 - 101
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    This correspondence discusses techniques for estimating the spectral skewness of the baseband spectrum of the complex envelope of a narrow-band Gaussian process from its undistorted and distorted (by memoryless nonlinear devices) in-phase and quadrature components. Some applications of the spectral skewness in communication theory are also mentioned. 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