Vectored DSL to the rescue Fiber Speeds on Copper Lines ? It ’ s True !
نویسنده
چکیده
the various flavors of Asymmetric DSL (ADSL), which are limited to 1.104 or 2.208 MHz, and are designed for operation over relatively long loops. VDSL is particularly vulnerable to crosstalk for both the downstream and the upstream transmission directions; its data rate performance is typically limited by Far-End-Crosstalk (FEXT). This means that in practical deployments, where multiple pairs are sharing the same cable and are thus causing
منابع مشابه
Dynamic Spectrum Management for Next-Generation DSL Systems
The performance of DSL systems is severely constrained by crosstalk due to the electromagnetic coupling among the multiple twisted pairs making up a phone cable. In order to reduce performance loss arising from crosstalk, DSL systems are currently designed under the assumption of worst-case crosstalk scenarios leading to overly conservative DSL deployments. This article presents a new paradigm ...
متن کاملAchieving Quality IPTV over DSL
1 Executive Summary DSL has provided for the delivery of broadband services since the mid-1990s. By the fourth quarter of 2010, the world had over 350 million DSL lines in service, accounting for over 65% of the total broadband access market. In such a competitive access environment, differentiation is fundamental to business and driving revenue. To that end, IPTV has been considered a technolo...
متن کاملEstimation of Line Properties in the Copper Access Network
The copper access-network operators face the challenge of developing and maintaining cost-effective digital subscriber line (DSL) services that are competitive to other broadband access technologies. The way forward is dictated by the demand of ever increasing data rates on the twisted-pair copper lines. This forces a deployment of the DSL transceivers in cabinets closer to the customers with a...
متن کاملPerformance of splitterless DSL at higher speeds (99-558)
This document reports on performance of a splitterless "V/ADSL" system that uses DMT with 4.3125 kHz wide tones over the band from DC to 5 MHz. Asymmetric 26/3.2 Mbps V/ADSL service reaches over 3000 feet, while symmetric service at 6.5 Mbps and 3.2 Mbps reaches are 3000 to 6000 feet for the conventional (or digitally duplexed) DMT. These ranges are maintained even in the presence of bridged-ta...
متن کاملInterference Alignment for DSL.dvi
Inter-line interference, known as crosstalk, is the most significant source of performance degradation for Digital Subscriber Line (DSL) systems. Vectored DSL is an effective technique for the elimination of crosstalk; however, there are many scenarios in which Vectored DSL is not implementable or practical. Interference alignment is presented as a technique to solve these issues. In particular...
متن کامل