Ikanos Communications, Inc.

Yue-Peng Zheng

Patrick Duvaut

Julien D Pons

Massimo Sorbara

Massimo Sobara

Impulse noise from nearby or intense electrical sources can disrupt communications over digital subscriber lines. There are many methods to deal with errors produced by impulse noise sources. Forward error correction (FEC) codes such as Reed Solomon coding along with scrambling and interleaving are used to correct small errors. However, for larger errors, retransmission is favored. Retransmission can be applied at the Discrete Multi-tone symbol level thus eliminating the need to insert sequence identification into data transmission units, furthermore retransmission can also be employed to exploit the error correcting capabilities of the FEC codes. Finally, an impulse noise protection system can exploit impulse noise statistics to configure the redundancy in the FEC codes and to enable the use of blanking. Exemplary embodiments of systems described can cooperatively use impulse noise statistics to utilize retransmission, FEC and blanking to mitigate the effects of impulse noise.

Configurable impulse noise protection system and method based on impulse noise statistics

Various embodiments for mitigating impulse noise are disclosed that cooperatively use impulse noise statistics to utilize retransmission, forward error correction (FEC), and blanking to mitigate the effects of a wide variety of impulse noise sources.

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Marlboro, NJ, United States of America

Yue-Peng Zheng