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Adaptive Precoding for Downstream Crosstalk Precancelation in DSL Systems Using Sign-Error Feedback
Abstract
The performance of many very high bit rate digitalsubscriber line (VDSL) systems is limited by the effects of crosstalkamong the wires in a bundle. For the downstream, a precoder cancompensate for this, provided that some crosstalk channel informationis available at the transmitter. In this paper, we investigatethe issue of precoder design based on a particular type of feedback:it is assumed that each receiver sends back the (c ....etc

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4G Wireless Systems

Abstract :

The ever-increasing growth of user demand, the limitations of the third generation of wireless mobile communication systems and the emergence of new mobile broadband technologies on the market have brought researchers and industries to a thorough reflection on the fourth generation. Many prophetic visions have appeared in the literature presenting 4G as the ultimate boundary of wireless mobile communication without any limit to its potential, but in practical terms not giving any design rules and thus any ....etc

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Definition

The accelerated growth of content-rich applications that demand high bandwidth has changed the nature of information networks. High-speed communication is now an ordinary requirement throughout business, government, academic, and work-at-home environments. High-speed Internet access, telecommuting, and remote LAN access are three services that network access providers clearly must offer. These rapidly growing applications are placing a new level of demand on the telephone infrastructure, in particular, the local loop portion of ....etc

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VoDSL

The VoDSL (Voice over DSL) decodes signaling messages that are exchanged over VoDSL network and protocols used over LES ATM-AAL2 links. The main purpose of the signaling messages are to allocate AAL2 channels, activate user IAD ports, manage the customer premises IAD through the EOC management channel and to set and release POTS and ISDN calls. The whole concept of VoDSL is to support multiple voice calls, either inbound or outbound, over a single DSL circuit, while simultaneously supporting high speed Internet access. VoDSL is based o ....etc

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Definition

The accelerated growth of content-rich applications that demand high bandwidth has changed the nature of information networks. High-speed communication is now an ordinary requirement throughout business, government, academic, and work-at-home environments. High-speed Internet access, telecommuting, and remote LAN access are three services that network access providers clearly must offer. These rapidly growing applications are placing a new level of demand on the telephone infrastructure, in particular, the local loop portion of ....etc

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Wireless DSL

The Wireless Last Mile
In October 2002, at Owensboro, a small Kentucky city on the Ohio River, after a five-month pilot program, the local electricity and water provider, Owensboro Municipal Utilities (OMU), rolled out a high-speed broadband service to the city's 58 000 residents at US $25 a month, just $2 more than what many were paying for low-speed dial-up access. In a short six months since launching service, OMU Online has connected more than 700 customers with broadband access. Currently, it has a backlog of several hund ....etc

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