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Communications, IEEE Transactions on

Issue 12 • Date December 1976

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

    Publication Year: 1976 , Page(s): 0
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    Freely Available from IEEE
  • Editorial: Time for a Change

    Publication Year: 1976 , Page(s): 1281
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1976 , Page(s): 1282
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1976 , Page(s): 0
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    Freely Available from IEEE
  • Optimum Detection of Quantized PAM Data Signals

    Publication Year: 1976 , Page(s): 1301 - 1309
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (752 KB)  

    The degree of complexity of a digital signal processor is closely related to the precision with which samples of an incoming analog waveform are represented. There is considerable interest in determining how coarse this representation can be without seriously degrading performance from that of an ideal processor of unquantized samples. This question is examined for a receiver of noisy, linearly di... View full abstract»

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  • An Equalizer Structure with Reduced Sampling Time Reference Sensitivity

    Publication Year: 1976 , Page(s): 1337 - 1343
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (616 KB)  

    In the last decade the work on linear tapped delay line equalizers has proved successful in reducing intersymbol interferenceone of the largest problems in data communication systems. An adjoining problem is the selection of a sampling time reference. An equalizer structure less sensitive to sampling time reference is studied for adaptive equalization. The equalization is simply done by means of t... View full abstract»

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  • Three-Level Subscriber's Loop Signaling for a Data Network

    Publication Year: 1976 , Page(s): 1331 - 1336
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB)  

    This concise paper reports the result of a study leading to the design for a subscriber's loop signaling system in a data switching network. The data switching network is intended to have improved quality and versatility, and be less expensive than the existing data communication systems. Therefore, various requirements are imposed on the subscriber's loop signaling system. The three-level subscri... View full abstract»

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  • Timing Recovery for Equalized Partial-Response Systems

    Publication Year: 1976 , Page(s): 1326 - 1331
    Cited by:  Papers (35)  |  Patents (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (536 KB)  

    It is shown that the sensitivity of the performance of least mean-square error (LMS) equalizers to the sampler phase is a function of equalizer length for partial-response systems. An LMS algorithm for the adjustment of sampler phase is derived for partial-response systems. This algorithm does not require the transmission of any pilot tones and is relatively easily implementable by digital circuit... View full abstract»

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  • A Simulation Study of Digital Modulation Methods for Wide-Band Satellite Communications

    Publication Year: 1976 , Page(s): 1351 - 1354
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (472 KB)  

    A computer simulation study has been performed to evaluate the performance of a variety of digital modulation techniques in transmitting high-rate digital data over a satellite channel. Results are presented showing comparative performance of various techniques in the form of error-rate curves and signal-to-noise ratio (SNR) degradation curves. View full abstract»

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  • Receiver Designs for Fiber Optic Communications Optimization in Terms of Excess Noise Factors That Depend on Avalanche Gains

    Publication Year: 1976 , Page(s): 1343 - 1346
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (384 KB)  

    The optimizations of signal-to-noise ratios (SNR's) and pulse error rates in fiber optic receivers are investigated in terms of an avalanche photo diode (APD) model in which excess noise factors depend on the avalanche gains. The optimization of SNR results in an analytical solution for the optimum avalanche gain. A numerical example compares the result with those of conventional SNR optimization ... View full abstract»

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  • A New Approach to Computing Distortion of an FM Single-Tone Modulated Signal Due to Ideal Filtering

    Publication Year: 1976 , Page(s): 1317 - 1321
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (416 KB)  

    By factorizing a finite sum of harmonics, an expression is obtained for an FM demodulator output when the modulating signal is a simple sinusoid and the RF filter is an ideal bandpass filter. Using this result, harmonic distortions and the signal-to-distortion ratio are defined and computed; several curves are drawn to show the variation of these quantities in terms of the modulation index and the... View full abstract»

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  • An Efficient Method of Simulation for Time-Sharing Systems

    Publication Year: 1976 , Page(s): 1316 - 1317
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (216 KB)  

    Simulation of requests for service from a large number of low duty cycle independent users is apt to cause a severe computational load. A method is presented for the software implementation of an efficient simulator. It can be applied to the investigation of many time-sharing systems, such as satellite demand assignment (DA), computer time sharing, and traffic routing. More generally, the method g... View full abstract»

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  • Optimal Linear Coding for Vector Channels

    Publication Year: 1976 , Page(s): 1283 - 1290
    Cited by:  Papers (70)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (680 KB)  

    This paper is concerned with the problem of obtaining the optimal linear vector coding (transformation) method that matches an r -dimensional vector signal and a k -dimensional channel under a given channel power constraint and mean-squared-error criterion. The encoder converts the r c... View full abstract»

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  • PCM-FDM System for Existing Microwave Radio Baseband

    Publication Year: 1976 , Page(s): 1346 - 1350
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (472 KB)  

    Digital transmission over the empty lower baseband of an existing microwave radio system has the advantages of economical and easy construction. A 1.544 Mbit/s PCM-FDM converter (PF-B1) has been developed. Field test results show that the error-rate per bit is less than 10-8over 840 km with 3 basebands. View full abstract»

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  • On Optimal Analog Repeater Systems

    Publication Year: 1976 , Page(s): 1310 - 1315
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (512 KB)  

    In this paper, the optimal analog repeater system which transmits maximum mutual information (MI-system) is discussed. The solution is obtained by conventional variational method and the functional structure of the resulting optimal system is investigated. The system consists of a whitening filter, an "equivalent cable," and a "system equalizer," the concepts of which are newly introduced and defi... View full abstract»

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  • Mutual Synchronization Properties of a System of Two Oscillators with Sinusoidal Phase Detectors

    Publication Year: 1976 , Page(s): 1321 - 1326
    Cited by:  Papers (9)  |  Patents (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (536 KB)  

    Mutual synchronization between two geographically separated phase-locked oscillators is investigated for two different interconnection methods. This includes the so-called single-ended (uncompensated delay) and the double-ended (compensated delay) methods. Explicit formulas for determining the steady-state frequency and phase errors are developed for both methods. Necessary conditions for the exis... View full abstract»

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  • A Digital Receiver for Tone Detection Applications

    Publication Year: 1976 , Page(s): 1291 - 1300
    Cited by:  Papers (9)  |  Patents (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (832 KB)  

    A digital circuit suitable for detection of tones in signaling applications is described. The amount of hardware required for the realization of the circuit is shown to be quite small. The circuit may be used for both analog and digital input signals. For analog signals, the necessary A/D conversion becomes very simple. Results of simulations on a digital computer are given that indicate the good ... 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
Robert Schober
University of British Columbia