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Method and system for reducing interferences due to handshake tones

A tone and algorithm technology, applied in transmission systems, crosstalk reduction, multi-frequency code systems, etc., can solve the problems of reduced signal-to-noise ratio and unreduced handshake interference.

Inactive Publication Date: 2005-10-19
肯奈克斯特公司
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Problems solved by technology

[0011] Interference of handshake tones FEXT and NEXT into adjacent ADSL services sharing the same cable bundle can significantly degrade the signal-to-noise ratio, resulting in errors that an error correction system cannot handle
These handshake disturbances are not mitigated in existing ADSL Customer Premises Equipment (CPE) and Central Office (CO) modems

Method used

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  • Method and system for reducing interferences due to handshake tones
  • Method and system for reducing interferences due to handshake tones
  • Method and system for reducing interferences due to handshake tones

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Embodiment Construction

[0025] The following description will provide a thorough understanding of the invention by providing some specific examples and details including interference reduction applications. It is to be understood, however, that the invention is not limited to these specific examples and details, which are illustrative only. It also needs to be understood that those of ordinary skill in the art can apply the present invention to their desired objectives and advantages in any number of alternative embodiments based on known systems and methods, based on specific designs and other needs middle.

[0026]One embodiment of the present invention aims to substantially reduce NEXT and / or FEXT interference caused by handshake tones. For example, NEXT and / or FEXT interference due to G.994.1 handshake tones, labeled bins 7 and 9 for upstream channels and bins 12, 14 and 64 for downstream channels, can be reduced. In the CO, since tones 12 and 13 cover the ADSL upstream channel bandwidth rangin...

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Abstract

A method and system of the present inventions reduces both NEXT and FEXT interferences due to handshake tones into upstream and downstream neighboring services, both at the CPE and at the CO, when handshake is experienced. An embodiment of the present inventions is directed to significantly reduce the NEXT and / or FEXT interferences due to handshake tones. For example, NEXT and / or FEXT interferences due to G.994.1 handshake tones, identified as, bins 7 and 9 for the Upstream channel and bins 12, 14 and 64 for the Downstream channel may be reduced. An embodiment of the present inventions provides an algorithm that may be used for both NEXT and FEXT Handshake Interferences reduction at the CO and at the CPE. In addition, the algorithm may operate in the time domain and in the frequency domain. Frequency domain algorithm offers two options, both versions taking advantage of the high correlation time of the Handshake tone signals.

Description

[0001] Cross References to Related Applications [0002] This patent application claims priority to US Provisional Patent Application No. 60 / 413,779, filed September 27, 2002, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention generally relates to reducing interference caused by handshaking tones, and more specifically, to a method for reducing near-end crosstalk (NEXT) and far-end crosstalk (FEXT) caused by handshaking tones in the time domain and / or frequency domain. methods and systems. Background technique [0004] With the further proliferation of the Internet and other content-heavy electronic communication systems, there is now a considerable need for reliable and affordable high bandwidth media to facilitate data transfer between service providers and their customers. As far as the need for these media to be affordable to users, an efficient way to deliver services to users involves utilizing the infrastructure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/32H04L5/02H04L5/16
CPCH04L5/023H04L5/16H04B3/32
Inventor 艾伍德·兰格博尔格帕特里克·杜瓦特比德·克里文劳伦特·皮尔卢古斯
Owner 肯奈克斯特公司
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