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Dissertations / Theses on the topic 'Asymmetric digital subscriber lines'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Zeng, Zhaohui. "Asymmetrical digital subscriber line (ADSL) over ultra-long telephone lines." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ55941.pdf.

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2

Franklin, Daniel Robert. "Enhancements to channel models, DMT modulation and coding for channels subject to impulsive noise." School of Electrical, Computer & Telecommunications Engineering - Faculty of Informatics, 2007. http://ro.uow.edu.au/theses/18.

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DMT modulation is an OFDM-based modulation scheme used in ADSL and proposed for various other high-speed broadband access systems. Existing mathematical models for transmission lines make a number of simplistic assumptions about the distribution of noise, in particular, the assumption that impulsive noise originates at either end of the transmission line. It is therefore desirable to improve the accuracy of the transmission-line model to allow better prediction of broadband modem performance, and to further improve the bit-allocation algorithms and equaliser designs used in DMT-based modems. T

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3

Umansky, Alec. "HIGH BANDWIDTH PORTABLE TRANSMISSION SYSTEMS USE OF xDSL TECHNOLOGY IN MILITARY, INDUSTRIAL AND TELEMETRIC APPLICATIONS." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/606418.

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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>This paper introduces new telemetry (communications) equipment based on Digital Subscriber Loop DSL technology (high speed transmission over copper cables) for defense and industrial applications. A brief xDSL technology overview is followed with introduction of the new ‘P3’ product and its application, reviewing advantages of using copper as a communications medium whenever rapidly deployed data and voice links are essential. An Australian Army report, detai

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Umansky, Alec. "HIGH BANDWIDTH PORTABLE TRANSMISSION SYSTEMS USE OF xDSL TECHNOLOGY IN MILITARY AND INDUSTRIAL TELEMETRIC APPLICATIONS." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/606792.

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International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California<br>This paper introduces new telemetry equipment based on Digital Subscriber Loop DSL technology (high speed transmission over copper cables) for military and industrial applications. A brief xDSL technology overview is followed with introduction of the new ‘P3’ product. A number of new applications for remote data transmission are presented and further highlighted in the Australian Army report detailing their recent equipment operational deployments.

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5

Horsfield, C. A. "ATM over an asymmetric digital subscriber line." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/9589.

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Includes bibliographical references.<br>This thesis investigates Asymmetric Digital Subscriber Line (ADSL) access networks and considers Asynchronous Transfer Mode (ATM) transport in the ADSL network. To analyse the ADSL access network, a simulation was developed using C++ and MATLAB. The thesis outlines the background and implementation of ADSL in the opening sections and then moves on to details about developing a simulation of the network. The development of the simulation model outlining the development of noise sources in the network is described and modules for the network implementation

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6

Leung, Christopher. "Distributed resource allocation algorithms for digital subscriber lines." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103633.

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The Digital Subscriber Line (DSL) environment is characterized by highly frequency-selective attenuation and by potentially large crosstalk between users. DSL resource allocation algorithms allow for an efficient use of the DSL network by managing the crosstalk-induced interference while also taking the frequency-selectivity into account. Previous resource allocation algorithms were based on worst-case situations. The more recent Dynamic Spectrum Management (DSM) resource allocation algorithms are able to constantly adapt to the channel characteristics. At one end of the DSM algorithms, there

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7

McKinley, Alastair. "Novel bit-loading algorithms for spectrum balancing in digital subscriber lines." Thesis, Queen's University Belfast, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527921.

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8

Tzschoppe, Roman [Verfasser], and Johannes [Akademischer Betreuer] Huber. "Crosstalk Cancellation for Digital Subscriber Lines (DSL) / Roman Tzschoppe. Betreuer: Johannes Huber." Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2011. http://d-nb.info/1035541459/34.

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9

Van, Wyk Jacques Herman. "Determination of ADSL capacity in a generic exchange environment." Pretoria : [s.n.], 1999. http://upetd.up.ac.za/thesis/available/etd-12202006-151200/.

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10

Duplessis-Beaulieu, François. "Multicarrier transceivers using DFT filter banks with perfect reconstruction property." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115865.

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In recent years, multicarrier modulation techniques have stirred great interest among engineers and researchers working in the field of telecommunications. Multicarrier systems are characterized by the fact that constellation symbols are modulated in parallel onto several distinct subcarriers. One specific form of multicarrier modulation, referred to as OFDM (orthogonal frequency division multiplexing), has been deployed in many applications, such as in wireless LAN (local area network) routers, in high-definition television tuners, and in DSL (digital subscriber line) modems. Multicarrier and

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11

Ferrari, Rafael 1977. "Equalização preditiva e otimização de sistemas DSL por gerenciamento espectral e processamento MIMO." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260850.

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Orientadores: João Marcos Travassos Romano, Renato da Rocha Lopes<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-18T11:11:47Z (GMT). No. of bitstreams: 1 Ferrari_Rafael_D.pdf: 1296185 bytes, checksum: 371d066f2d7901daa13e425b71cd9ce8 (MD5) Previous issue date: 2011<br>Resumo: O trabalho é dividido em duas partes e trata de três problemas importantes existentes nos sistemas de comunicação: o gerenciamento espectral, o cancelamento de interferências e a equalização de canais. Na primeira parte do

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12

Li, Cheng-Hsien, and 李政憲. "A Low Complexity Adaptive Echo Cancellation Technique for Asymmetric Digital Subscriber Lines." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/00737717505460798796.

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碩士<br>國立清華大學<br>電機工程學系<br>87<br>Discrete Multitone (DMT) modulation has been chosen to provide the high-speed link for Asymmetric Digital Subscriber Lines (ADSL) service. Hybrid circuits are commonly used to provide full-duplex transmission over subscriber loops. However, the imperfect characteristics in the hybrid circuits cause signal leakage and result in a serious echo problem. Therefore, a high performance echo canceller is necessary for a full-duplex ADSL transceiver. Cyclic echo synthesizer (CES)-based echo cancellation (EC) is an effective technique for DMT EC. This techn

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13

Yang, Shun-Pin, and 楊順斌. "A Low-Complexity Time-Domain Equalization Technique for Asymmetric Digital Subscriber Lines." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/56273336821235194015.

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碩士<br>國立清華大學<br>電機工程學系<br>87<br>As the internet gets more and more popular, the demands for high speed transmission network become more and more urgent. Asymmetric digital subscriber lines (ADSL) technology is a new transmission technique designed to provide several megabits per second downstream and hundreds of kilobits per second upstream through telephone lines (copper wires). As the highly dispersive property of telephone lines, one form of multicarrier modulation techniques, called discrete multitone (DMT) modulation, has been selected by the American National Standards Institute (ANSI) a

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14

Ramasolo, Gabriel Maile. "Factors that affect low uptake of ADSL service in Soweto." 2014. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001325.

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M. Tech. Business Administration<br>Internet penetration in South Africa stood at 13.9% in 2011 as compared to average of 30% for the rest of the world. Given the racial demographics in South Africa where Black Africans constitute 79.5% of the population it stand to reason that given all things equal, Black Africans should constitute a greater part of the 13.9% however preliminary studies based on the number of subscribers of Asynchronous Digital Subscriber Line (ADSL) subscription in residential areas indicated the opposite. The 20.5 % remainder of the population made up of the Coloureds, Whi

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15

Περιβολάρης, Παναγιώτης. "Σχεδίαση δικτύου πρόσβασης ευρείας εκπομπής με τεχνοοικονομικό μοντέλο". Thesis, 2010. http://nemertes.lis.upatras.gr/jspui/handle/10889/3787.

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Με την εργασία αυτή γίνεται μια οικονομική αξιολόγηση ενός ευρυζωνικού δικτύου πρόσβασης μέσα από την ανάπτυξη ενός προγράμματος (σε κώδικα C) που σαν εισόδους έχει την διείσδυση της κάθε υπηρεσίας στην αγορά, δηλαδή τον αριθμό των πιθανών συνδρομητών, τα στοιχεία της περιοχής, τον εξοπλισμό του δικτύου που πρόκειται να εγκατασταθεί, καθώς και οικονομικά στοιχεία όπως η χρέωση για την υπηρεσία από τον πάροχο. Χρησιμοποιώντας τα στοιχεία αυτά η εφαρμογή υπολογίζει την Καθαρή Παρούσα Αξία (NPV) τον Εσωτερικό Ρυθμό Επιστροφής (IRR) καθώς και την Παρούσα Αξία Ετήσιων Δαπανών (PVAC) για έν

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16

Wang, Si Jun, and 王嗣鈞. "A software asymmetric digital subscriber line transciver." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/06789399186958677281.

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17

Van, Wyk J. H. (Jacques Herman). "Determination of ADSL capacity in a generic exchange environment." Diss., 1999. http://hdl.handle.net/2263/30451.

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Please read the abstract in the front matter this document<br>Dissertation (M Eng (Electronic Engineering))--University of Pretoria, 2006.<br>Electrical, Electronic and Computer Engineering<br>unrestricted

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18

Chan, Vincent Man Kin. "Multiuser detection and spectrum balancing for digital subscriber lines." 2005. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=370215&T=F.

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19

Jian-long, Lai, and 賴建隆. "Research on the DMT-based asymmetric digital subscriber line modem." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/00709206940751017582.

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碩士<br>國立雲林科技大學<br>電子與資訊工程技術研究所<br>86<br>The asymmetric digital subscriber loop (ADSL) is an interim communication technique that enables high-speed data transmissions over conventional teleph-one lines. The discrete multitone (DMT) modulation format has been selected as the ANSI standard for ADSL metallic interface due to its superior performance. For DMT-based ADSL, the physical channel is divided into multiple subcha-nnels,each of which is allocated with an appropriate number of bits and trans-mit power accordingto its signal-to-noise ratio(SNR).To avoid the interchannel interference(ICI),th

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20

Chang, Rong-Chuen, and 張榮春. "Maintenance Management Analysis of Asymmetric Digital Subscriber Line Broadband Access Network." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/80688370929243166445.

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碩士<br>國立雲林科技大學<br>電機工程系碩士班<br>92<br>Nowadays , the broadband access network has become the mainstream around the world . ADSL (Asymmetric Digital Subscriber Line) is the main product of CHT broadband network services . It plays a very important role in the broadband access network . In this thesis we focus on the discussion of the maintenance viewpoint and support system . And this paper also describes a testing method for ADSL physical layer and the performance in wide bandwidth applications. We propose a efficient operating support system , BroAdband Network Service Processing and Managemen

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21

Li, Kuo-Liang, and 李國良. "Evaluation of the IEEE 802.11b Wireless LAN over Asymmetric Digital Subscriber Line." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/09506144285503012431.

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碩士<br>逢甲大學<br>電子工程所<br>91<br>To comply with the requirement of customers, various technologies of xDSLs are developed. The technologies make use of the existed twisted-pair copper cable network to provide inexpensive services with a high capacity of transmission bandwidth. With the emergence of wireless networks and increasing demand of wireless networks service on the Internet, wireless networks services are foreseen to become widely deployed in the next decade. The greatest advantage of the wireless LAN can be located in any private location without wired network. Wireless communication

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22

王泗堆. "The Analysis and Applications of Asymmetric Digital Subscriber Line on Broadband Networks." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/62485662929542669104.

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碩士<br>大葉大學<br>電機工程研究所<br>90<br>In recent years, accompanied by prevalence of electronic commerce and popularization of the internet, the gigantic multimedia information has almost taken up the networks. It is difficult to use traditional modem to transmit the data. The DSL technology is proposed to achieve broadband access by transmitting data on existing telephone network instead of using fiber all the way to the residence, which is more costly. The three main kinds of broadband access network technologies are cable modem and digital subscriber line and DirecPc. In this thesis, fir

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23

Wang, Kelvin, and 王科方. "Study of echo cancellation technique for asymmetric digital subscriber loop with discrete multitone modullation." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/60491742227548779172.

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碩士<br>國立交通大學<br>電子研究所<br>82<br>Echo is a very serious problem for the full-duplex transmission over subscriber loop. Hybrid circuit can not solve this problem because of its imperfect. Thus the echo canceller is usuallly necessary in the transceiver. Because of the high transmitting rate of ADSL(asymmetric digital subscriber loop), echo canceller becomes too complex. A lowcomplexity data- driven echo canceller is described and simulated. It combines frequency-domain LMS filter

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24

Ananya, S. N. "On The Best-m Feedback Scheme In OFDM Systems With Correlated Subchannels." Thesis, 2015. http://etd.iisc.ernet.in/handle/2005/2637.

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Orthogonal frequency division multiplexing (OFDM) in next generation wireless systems provides high downlink data rates by employing frequency-domain scheduling and rate adaptation at the base station (BS). However, in order to control the significant feedback overhead required by these techniques, feedback reduction schemes are essential. Best-m feedback is one such scheme that is implemented in OFDM standards such as Long Term Evolution. In it, the sub channel (SC) power gains of only the m strongest SCs and their corresponding indices are fed back to the BS. However, two assumptions pervad

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王敏書. "Design and Implementation of a DMT Baseband Processor for Very High Speed Digital Subscriber Lines." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/52829078565045802250.

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碩士<br>國立臺灣大學<br>電機工程學研究所<br>89<br>In this thesis, a transceiver design for VDSL standard using the DMT(Discrete Multi-Tone) modulation is proposed. The design is based on ETSI VDSL standard, which is for very high speed digital subscriber loop. Recently, the need for high-speed data transmission increases rapidly, especially in the application of net-meeting, video on demand, video phone, etc. The DSL technology is proposed to achieve broadband access by transmitting data on existing telephone network instead of using fiber all the way to the residence, which is more costly. Basic principles o

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26

"Cost effective DSL solutions for the developing countries." Thesis, 2004. http://hdl.handle.net/10413/4279.

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Developing countries in Africa present a graphic picture of the digital divide. High costs associated with serving rural customers are the major cause of uneven distribution of services. Rural areas are characterised by a high rate of unemployment and a poor level of education. This results in a scenario where most of the residents are unable to utilize IT resources. Some people in these areas are not informed about the availability and importance of these technologies in the market. Those who are academically fit for accessing these technologies often cannot afford them. Some of the areas sti

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27

Wang, Amanda. "Effects of bridged taps on the channel capacity of very high-bit-rate digital subscriber lines." Thesis, 1999. http://hdl.handle.net/2429/9283.

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The Digital Subscriber Line (DSL) technologies have been developed to meet the growing demand for high speed data transmissions to home. These technologies offer data rates that are of several order of magnitudes compared to today's analog modems operating over the same existing copper twisted pairs. Very-high-bit-rate DSL (VDSL) is the latest member of the DSL family. To date, most of the analysis on channel performance for VDSL systems are based on the model of transmission lines without considering the adverse effects caused by the presence of bridged taps. In practical situations; ho

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28

Παπανδρέου, Νικόλαος Ι. "Αλγόριθμοι κατανομών ισχύος και ρυθμού μετάδοσης δεδομένων για πολυκαναλικά συστήματα". 2004. http://nemertes.lis.upatras.gr/jspui/handle/10889/304.

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Το αντικείµενο αυτής της διδακτορικής διατριβής είναι η σχεδίαση και η ανάλυση νέων αλγορίθµων υπολογισµού των κατανοµών ισχύος και πληροφορίας σε πολυκαναλικά συστήµατα τεχνολογίας ψηφιακών συνδροµητικών γραµµών DSL. Η αρχή λειτουργίας των πολυκαναλικών συστηµάτων βασίζεται στη διαίρεση του συνολικού φάσµατος σε επιµέρους υποκανάλια χαµηλού ρυθµού µετάδοσης, τα οποία µεταφέρουν τη συνολική πληροφορία µέσω ειδικών τεχνικών διαµόρφωσης. Ο υπολογισµός των κατανοµών της ισχύος εκποµπής και της πληροφορίας στα υποκανάλια του συστήµατος βασίζεται σε αλγορίθµους που είναι γνωστοί µε τον όρο αλγόριθµ

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