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High-bit-rate digital subscriber line

About: High-bit-rate digital subscriber line is a research topic. Over the lifetime, 516 publications have been published within this topic receiving 8537 citations. The topic is also known as: HDSL & high-bit-rate DSL.


Papers
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01 Feb 2004
TL;DR: This document defines a Management Information Base (MIB) module for use with network management protocols in the Internet community and describes objects used for managing Very High Speed Digital Subscriber Line (VDSL) interfaces.
Abstract: This document defines a Management Information Base (MIB) module for use with network management protocols in the Internet community. In particular, it describes objects used for managing Very High Speed Digital Subscriber Line (VDSL) interfaces.

4 citations

Journal ArticleDOI
TL;DR: The adoption of asymmetrical digital subscriber lines (ADSL) technology in conjunction with the broadcast digital subscriber Lines (BDSL) proposed in this paper could provide a cost effective solution for the introduction of digital video services in the near term.
Abstract: The adoption of asymmetrical digital subscriber lines (ADSL) technology in conjunction with the broadcast digital subscriber lines (BDSL) proposed in this paper could provide a cost effective solution for the introduction of digital video services in the near term. BDSL provides the same digital broadcast video programs to all subscribers through existing twisted pair telephone loops. In this paper, the basics of telephone loop-based digital subscriber lines are first discussed. Then the potential of BDSL is explored in the twisted pair loop plant near end crosstalk (NEXT), far end crosstalk (FEXT), and white noise environment. The capability of BDSL is examined with different serving areas and transmit power levels. The possibility of using orthogonal quadrature amplitude modulation (QAM) to implement a zero guard-band BDSL system is studied. Computer BDSL performance simulations are then presented. The combination of high-bit-rate digital subscriber lines (HDSL), ADSL, and BDSL can provide telephone subscribers many digital broadband services

4 citations

Patent
Lechner Robert Dipl Ing1
18 Jul 1991
TL;DR: In this paper, a programmable filter (Z, B) which connects the four-wire transmit branch to the fourwire receive branch in a chip (SICOFI) connected together with the interface circuit (SLIC1) and also ensures that the two-wire impedance is provided with a complex value is provided.
Abstract: The subscriber line is coupled capacitively (C, K). In the subscriber line interface circuit (SLIC) of the line circuit, a positive feedback path leading from the four-wire transmit output to the four-wire receive input and containing filter elements (F) is formed, by means of which a basic setting of the two-wire impedance is effected which is higher than the impedance of the feed bridge, this basic setting is complemented to form the required exact value with the aid of a programmable filter (Z, B) which connects the four-wire transmit branch to the four-wire receive branch in a chip (SICOFI) connected together with the interface circuit (SLIC1) and also ensures that the two-wire impedance is provided with a complex value.

4 citations

Proceedings ArticleDOI
D. Mueller1, A. Kaelin1
28 Apr 1995
TL;DR: A new high bit-rate digital subscriber line (HDSL) echo canceler scheme using an optimized orthogonal recursive prefilter reducing the computational cost if compared to a conventional FIR filter, a new analog precancellation technique which reduces the dynamic range of the A/D converter, and simple digital correction techniques that reduce the linearity requirements on the data converters.
Abstract: In this paper, we present a new high bit-rate digital subscriber line (HDSL) echo canceler scheme. It uses an optimized orthogonal recursive prefilter reducing the computational cost if compared to a conventional FIR filter, a new analog precancellation technique which reduces the dynamic range of the A/D converter, and simple digital correction techniques that reduce the linearity requirements on the data converters. With these features, we expect the hybrid echo canceler to be suitable for a possible one-pair HDSL system.

4 citations

Proceedings ArticleDOI
07 Jun 2007
TL;DR: In this paper, the impulsive noises c1 and c2 (defined in G.996.1) are injected into the circuit at the CO (Central Office) end and CPE (Customer Premises Equipment) end of the loop simulator.
Abstract: Broadband services require data rates that can only be achieved by using relatively high spectrum frequencies. At such high frequencies, the DSL (Digital Subscriber Line) signal is more susceptible to external noise sources, such as radio frequency interference and impulsive noise. This paper aims to characterize how the impulsive noise impacts on services and applications for a broadband system using an ADSL2+ loop. The first approach was to use the impulsive noise defined in the standards G.996.1 (Test Procedures for DSL Transceivers) from ITU-T and TR-048 (ADSL Interoperability Test Plan) from DSL Forum. In this approach we have also used a HDSL (High Bit Rate DSL) and white noise disturbers on the line. The impulsive noises c1 and c2 (defined in G.996.1) are injected into the circuit at the CO (Central Office) end and CPE (Customer Premises Equipment) end of the loop simulator. Additionally, it was analyzed the spikes of noise's impact on the ADSL2+ line. In this case, pre-defined models of NEXT (Near-end crosstalk) and white noise are injected on CO and CPE side, simultaneously. Metrics like packet rate, lost packet count, bandwidth, short-term average transfer delay, and errored seconds are used to characterize the DSL loop under the noise impairments. (Less)

4 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20181
20171
20162
20154
20144
20132