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ITU-T G.998.4

Improved impulse noise protection for DSL transceivers Corrigendum 2

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Organization: ITU-T
Publication Date: 1 April 2011
Status: inactive
Page Count: 8
scope:

This Recommendation specifies techniques beyond those defined in the existing ITU-T digital subscriber line (DSL) Recommendations G.992.3 [1], G.992.5 [2], and G.993.2 [3] to provide enhanced protection against impulse noise or to increase the efficiency of providing impulse noise protection (INP).

Impulse noise is a noise event of limited duration that can degrade one or more transmitted symbols. Unlike the various types of continuous noise found on DSLs, impulse noise has a short duration and may repeat, either randomly or periodically. Impulse noise that does not appear to repeat periodically but occur as unpredictable events is termed SHINE (Single high impulse noise event). Impulse noise caused by noise from electrical mains and thus repeats at a constant period related to the local AC power frequency is termed REIN (Repetitive electrical impulse noise).

Impulse Noise Protection techniques are, in general, techniques used by a DSL transceiver to protect against the effects of impulse noise on the transmitted signal. Existing ITU-T DSL Recommendations specify techniques to ameliorate impulse noise effects. Among these methods are the use of Forward Error Correction (FEC) coding and interleaving.

This Recommendation specifies a physical layer retransmission method for enhancing INP, with Annexes specifically providing the details required for implementation of these techniques for transceivers supporting Recommendation G.992.3, G.992.5, and G.993.2. Methods for enhancing INP by techniques other than physical layer retransmission are for further study.

Document History

August 1, 2019
(Pre-Published) Improved impulse noise protection for digital subscriber line (DSL) transceivers Corrigendum 1
A description is not available for this item.
November 1, 2018
Improved impulse noise protection for digital subscriber line (DSL) transceivers
This Recommendation specifies techniques beyond those defined in the existing ITU-T digital subscriber line (DSL) [ITU-T G.992.3], [ITU-T G.992.5] and [ITU-T G.993.2] to provide enhanced protection...
August 1, 2017
Improved impulse noise protection for digital subscriber line (DSL) transceivers Corrigendum 1
A description is not available for this item.
January 1, 2015
Improved impulse noise protection for digital subscriber line (DSL) transceivers
This Recommendation specifies techniques beyond those defined in the existing ITU-T digital subscriber line (DSL) [ITU-T G.992.3], [ITU-T G.992.5] and [ITU-T G.993.2] to provide enhanced protection...
January 1, 2014
Improved impulse noise protection for DSL transceivers Amendment 3: Extended memory for enhanced bit rates with retransmission
A description is not available for this item.
March 1, 2013
Improved impulse noise protection for DSL transceivers Corrigendum 5
A description is not available for this item.
June 1, 2012
Improved impulse noise protection for DSL transceivers Corrigendum 4
A description is not available for this item.
April 1, 2012
Improved impulse noise protection for DSL transceivers Amendment 2
A description is not available for this item.
June 1, 2011
Improved impulse noise protection for DSL transceivers Amendment 1
This Recommendation specifies techniques beyond those defined in the existing ITU-T digital subscriber line (DSL) Recommendations G.992.3 [1], G.992.5 [2], and G.993.2 [3] to provide enhanced...
ITU-T G.998.4
April 1, 2011
Improved impulse noise protection for DSL transceivers Corrigendum 2
This Recommendation specifies techniques beyond those defined in the existing ITU-T digital subscriber line (DSL) Recommendations G.992.3 [1], G.992.5 [2], and G.993.2 [3] to provide enhanced...
June 1, 2010
Improved impulse noise protection for DSL transceivers
This Recommendation specifies techniques beyond those defined in the existing ITU-T digital subscriber line (DSL) Recommendations G.992.3 [1], G.992.5 [2], and G.993.2 [3] to provide enhanced...

References

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