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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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Book ChapterDOI
01 Jan 2005

27 citations

Patent
03 May 2000
TL;DR: In this paper, the authors propose a method and system for configurable and scalable line interface card protection or redundance useful for a range of low speed digital to high speed digital and optical signal types such as STS 1, STS 3, VT 1.5, DS 1/T1, DS 3/T3, ATM, ADSL, HDSL, OC 1, OC 2, OC 3, OC 4, OC 5, OC 6, OC 7, OC 8, OC 9, OC 10, OC 11, OC 12, OC 48, OC 192
Abstract: A method and system for configurable and scalable line interface card protection or redundance useful for a range of low speed digital to high speed digital and optical signal types such as STS-1, STS-3, VT1.5, DS-1/T1, DS-3/T3, ATM, ADSL, HDSL, OC-1, OC-3, OC-12, OC-48, OC-192, OC-768, STM-1, STM-4, STM-16, STM-64, E1, E3, J1, J2, and EtherNet and Token Ring LAN signals. A daisy-chain alternate signal path, signal selectors, and alternate front panel entry points are provided to a front-access telecommunications shelf system. Signal interface cards can be designated as primary cards to handle traffic under normal conditions, or as protection cards, without hardware constrained or slot-specific card requirements. Variations of 1:N protection, and multiple groups of 1:N configurations and partitions can be defined without changes to cabling or backplane design variations through setting of relays and signal selectors on each card. As such, any signal present on a cable connected to a primary card may be re-routed to any card designated as a protection card, by first routing the signal through a protection relay on the failed card to a cable to a neighboring card, through a data selector on the neighboring card onto the backplane, and to a selected protection card.

27 citations

Journal ArticleDOI
TL;DR: A 60-MHz 64-tap adaptive finite-impulse-response (FIR) filter chip was fabricated in 1.2- mu m CMOS to implement either an echo canceler or a decision feedback equalizer for 2B1Q high bit rate digital subscriber line (HDSL) transceivers.
Abstract: A 60-MHz 64-tap adaptive finite-impulse-response (FIR) filter chip was fabricated in 1.2- mu m CMOS. It can implement either an echo canceler or a decision feedback equalizer for 2B1Q high bit rate digital subscriber line (HDSL) transceivers. The 4.3*4.3 mm/sup 2/, 30000 transistor chip is a completely self-contained adaptive filter which incorporates the least mean square (LMS) algorithm for coefficient updating. The device can be cascaded to implement very long filter lengths, which are often required in high bit rate transceivers. At a 60-MHz clock rate, the echo canceler/decision feedback equalizer chip can accommodate symbol rates in excess of 800 kbaud. >

27 citations

Journal ArticleDOI
TL;DR: The recent growth in the use of digital radio is reviewed, and the technology used to implement low-power digital radio in the local exchange loop plant is discussed and the integration of digitalRadio subscriber loops with network intelligence is explored.
Abstract: The recent growth in the use of digital radio is reviewed. The technology used to implement low-power digital radio in the local exchange loop plant is discussed. The integration of digital radio subscriber loops withnetwork intelligence is explored. The relationship between low-power digital radio loops and broadband fiber loops is briefly examined, and standards and frequency allocation activities are summarized. >

26 citations

Patent
30 Jul 1999
TL;DR: In this paper, a method and system for determining the high speed data service capability of a subscriber line includes sending an embedded test signal to the subscriber line, and a reflected signal received in response to the test signal is analyzed for determining transmission characteristics.
Abstract: A method and system for determining the high speed data service capability of a subscriber line includes sending an embedded test signal to a subscriber line. A reflected signal received in response to the test signal is analyzed for determining transmission characteristics of the subscriber line. Based on the reflected signal, a determination about the high speed data service capabilities of the subscriber line is made and stored for future reference.

26 citations

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