Asymmetric digital subscriber line (ADSL) loop environment.
Item
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Title
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Asymmetric digital subscriber line (ADSL) loop environment.
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Identifier
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AAI9720133
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identifier
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9720133
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Creator
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Reddy, Ajit Kumar.
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Contributor
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Adviser: Syed V. Ahamed
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Date
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1997
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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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Computer Science | Engineering, Electronics and Electrical
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Abstract
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Simulation study of the matching circuits and functions for the transhybrid loss in the ADSL subscriber loop environment. The sixteen loops in the Digital Subscriber Loop Environment called as the Bellcore/ANSI Standard Loops have been considered for the study of the feasibility of increasing the transhybrid loss in the active hybrid circuits using optimization methods. This optimization attempts to reduce the near-end reflection which occurs as a result of the overlap of the forward and the reverse channel in the digital subscriber lines (ANSI) for the ADSL environment for DS2, DSC1 and DS1 rates in the forward channel and fractional DS1 or T1 rates (384 kb/s) in the reverse channel using Coefficient Relaxation and Component Relaxation techniques. The performance of these matching functions obtained by the two methods are compared and evaluated in terms of the maximum transhybrid loss obtained in either case. Time Domain Hybrid Attenuation using digital adaptation and analog cancellation has been discussed and their performance for fixed and adaptive models are also evaluated and implementation using Analog and Digital techniques are presented.
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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.
