التعديل DMT هو الخيار الأفضل لخطوط النقل الرقمية عالية السرعة VDSL

Authors

  • شحادة الموسى
  • معين يونس
  • وائل حسن صقر

Abstract

يبين هذا البحث أسباب اختيار التعديل DMT ( Discrete Multitone) مقابل التعديل
CAP (Carrier less Amplitude &Phase Modulation) كخيار أفضل لخطوط النقل الرقمية عالية السرعة VDSL (Very High speed digital subscriber line).

ويعرض هذا البحث أيضاً دور تعديل DMT في زيادة معدلات نقل المعطيات عن طريق زيادة عرض حزمة النقل لجعل شبكة الإنترنيت منبعاً هائلاً للمعلومات، وتأمين خدمات نقل المعطيات الجديدة باعتبارها منبعاً هائلاً للدخل القومي.

ويدرس هذا البحث جوهر كلا التعديلين ونقاط القوة والضعف لكليهما, وكذلك الأمر يتضمن تحليلاً لأنواع خطوط النقل وبعض الأمور العملية الأخرى والتي تبين لماذا يعتبر الـ DMT خيار أفضل لبناء أنظمة VDSL.

ويتضمن البحث أخيراً تمثيلاً برمجياً simulation للإشارة المرسلة DMT عبر خطوط النقل مع مرشح  وبدون مرشح، وآلية تحقيق النظام FMT (Filtered Multitone Modulation) ( تعديل DMT مع المرشح) لمرسل ومستقبل FMT.

This paper explains reasons for choosing DMT modulation versus CAP modulation as a better option for a very high speed digital subscriber line VDSL. It also illustrates the role of DMT modulation in increasing data bit-rate by increasing data bandwidth in order to make the internet a universally accessible "information superhighway" and support the more demanding web-based applications, being potential sources of revenue.

This paper also studies the essence of both modulations and the strengths, weaknesses of each; it includes an analysis of line conditions and other practical matters which   explain why DMT is a better option for VDSL system setting.

Finally, this paper also includes a simulation of transmitted DMT signal over digital subscriber line with and without filter, and an implementation of FMT (Filtered MultiTone modulation) system for FMT transmitter and receiver.

Downloads

Published

2019-01-23

How to Cite

1.
الموسى ش, يونس م, صقر وح. التعديل DMT هو الخيار الأفضل لخطوط النقل الرقمية عالية السرعة VDSL. Tuj-eng [Internet]. 2019Jan.23 [cited 2024Nov.27];28(2). Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/6963

Issue

Vol. 28 No. 2 (2006): العلوم الهندسية

Section

Articles

License

Copyright (c) 2019 ttps://creativecommons.org/licenses/by-nc-sa/4.0/

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series

 Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series   .  The Readers have the right to send, print and subscribe to the initial version of the article, and the title of  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series     Publisher

journal uses a CC BY-NC-SA license which mean

You are free to:

  • Adapt — remix, transform, and build upon the material
  •  
  • The licensor cannot revoke these freedoms as long as you follow the license terms.

 

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Most read articles by the same author(s)

1 2 3 > >>