SYNCHRONIZATION, BANDWIDTH OCCUPANCY AND EFFECTS OF TRANSMISSION ERRORS IN DIGITAL COMMUNICATION SYSTEMS.
Item
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Title
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SYNCHRONIZATION, BANDWIDTH OCCUPANCY AND EFFECTS OF TRANSMISSION ERRORS IN DIGITAL COMMUNICATION SYSTEMS.
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Identifier
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AAI8203270
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identifier
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8203270
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Creator
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BRAFF, MARTIN.
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Contributor
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Dr. Donald L. Schilling
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Date
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1981
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Electronics and Electrical
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Abstract
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This research is concerned with the following three areas: (a) Synchronization of digital networks, (b) Correlation and spectral density of a Convolutional Encoder, and (c) Channel errors in Delta Modulation.;(a) The increased use of digital transmission in telephone networks motivates attempts to perform the switching function in digital form also. Such a digital network, however, requires carefully synchronized clocks to perform correctly. In this dissertation we present a new technique for synchronizing such clocks called "Peak Synchronization". This technique will be studied and compared to others that have been previously investigated.;(b) When a digital signal is encoded for channel error protection, the resulting encoded signal may have statistics differing greatly from the original signal. The correlation of the encoded signal is especially important as it allows for the determination of the signal's power spectrum. The correlation also provides information about the density of transitions, which is important in bit synchronizer design. We will study the correlation of signals encoded by a convolutional encoder, with both purely random and first order Markov inputs.;(c) Delta Modulators have been extensively studied to determine their quantizing and slope overload distortion. However, the distortion introduced by channel errors has received little attention. Here we will determine the effect of channel errors on the performance of a Delta Modulator. Both independent random errors and errors occurring in bursts will be considered.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Engineering
