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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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Journal ArticleDOI
M.S. Kappes1
16 May 1999
TL;DR: In this paper, a fully differential CMOS line driver for use in high bit-rate digital subscriber line (HDSL) services is presented, which is fabricated in a single-poly quad metal 0.35-/spl mu/m process and achieves <-70dB total harmonic distortion while driving up to /spl plusmn/2.
Abstract: A fully differential CMOS line driver for use in high bit-rate digital subscriber line (HDSL) services Is presented. The circuit is fabricated in a single-poly quad metal 0.35-/spl mu/m process and achieves <-70-dB total harmonic distortion while driving up to /spl plusmn/2.4-V, 200-kHz signals into 30 /spl Omega/ with a 3-V supply. The circuit features a closed loop gain of 6.0 with minimal input capacitance (<200 fF). The circuit requires less than 20 mA of quiescent current and is capable of delivering dynamic currents as large as 180 mA. The circuit is a multistage amplifier utilizing nested-Miller compensation and an enhanced class AB output stage.

21 citations

Patent
Hansen Jan1, Hans Knutsson1
16 Mar 2007
TL;DR: In this paper, power is supplied to telecom equipment in DSLAM outdoor/remote cabinets with relatively short distances between the subscriber and the cabinet by providing power via the telephone line connecting the DSLAM and the subscriber CPE.
Abstract: Power is supplied to telecom equipment in DSLAM outdoor/remote cabinets with relatively short distances between the subscriber and the cabinet. All of the subscriber Customer Premises Equipment connected to the DSLAM each provide a portion of the required power to the remote cabinet via the telephone line connecting the DSLAM and the subscriber CPE. The CPE at the subscriber premises is already connected to power mains in the subscriber premises so, providing power, via the telephone line to the outdoor cabinet is relatively simple. The remote cabinet includes a circuit for receiving the power input from each subscriber and then distributing the power, required by the DSLAM load, equally among the subscribers.

21 citations

Journal ArticleDOI
TL;DR: It is shown that a simple uncoded ADSL would have an order of magnitude more errored seconds than DSL and HDSL.
Abstract: This paper describes the error performance of the ISDN basic access digital subscriber line (DSL), the high bit rate digital subscriber line (HDSL), and the asymmetric digital subscriber line (ADSL) in the presence of impulse noise. Results are found by using data from the 1986 NYNEX impulse noise survey in simulations. It is shown that a simple uncoded ADSL would have an order of magnitude more errored seconds than DSL and HDSL. >

21 citations

Journal ArticleDOI
TL;DR: A timing recovery scheme for transmission systems with baud-rate sampling allowing the use of an all digital phase-locked loop and the impact of the numerically controlled oscillator on the attainable signal-to-noise ratio and jitter under conditions of theETSI HDSL standard is discussed.
Abstract: This letter proposes a timing recovery scheme for transmission systems with baud-rate sampling allowing the use of an all digital phase-locked loop. The impact of the numerically controlled oscillator on the attainable signal-to-noise ratio and jitter under conditions of the European Telecommunications Standardization Institute (ETSI) HDSL standard is discussed.

21 citations

Patent
06 Mar 1998
TL;DR: In this article, the authors proposed a digital carrier telephony system for delivering voice and data telephony services to subscribers in rural locations having low population densities, where multiple remote drop units are typically connected to the digital carrier line.
Abstract: A digital carrier telephony system for delivering voice and data telephony services to subscribers in rural locations having low population densities. A Central Office processes telephony signals having subscriber channels. A Terminal (COT), which is connected to the CO and to one end of a digital carrier line, can transmit outgoing digital carrier line signals on the digital carrier line in response to multiplexing the subscriber channels of telephony signals received on a wired link from the CO. The COT also can transmit telephony signals to the CO in response to demultiplexing subscriber channels of incoming digital carrier line signals received on the digital carrier line. At subscriber locations, multiple remote drop units are typically connected to the digital carrier line. The remote drop unit can insert one of the subscriber channels into the multiplexed subscriber channels of one of the incoming digital carrier line signals. In addition, the remote drop unit can retrieve one of the subscriber channels from the multiplexed subscriber channels of one of the outgoing digital carrier line signals. The remote drop unit also can pass those incoming and outgoing carrier line signals carried on the digital carrier line not intended for communication to the subscribers associated with that unit. Each remote drop unit can be powered in the field by coupling span power generated by the COT and carried on the digital carrier line.

21 citations

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