Various methods and apparatuses for impulse noise detection
Assignee2Wire, Inc.
InventorsAndy Norrell, Scott Lery, Philip Desjardins, Mike Behrin
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Abstract
Methods and apparatuses for reducing effects of impulse noise in a DSL transmitter receiver device are described. According to certain embodiment, the method includes comparing a hard decision output of a decoder with a soft decision output for a convolution coded modulation symbol received at a digital subscriber line (DSL) receiver. The presence of impulse noise is detected based on a lack of agreement between the hard decision output and the soft decision output.
Claims18
A method for impulse noise detection, comprising:
- comparing a hard decision output of a decoder with a soft decision output for a convolution coded modulation symbol received at a digital subscriber line (DSL) receiver;
- and
- detecting a presence of impulse noise based on a lack of agreement between the hard decision output and the soft decision output.
A digital subscriber line (DSL) modem, having a receiver comprising:
- a comparator to compare soft decision data and hard decision data of a decoder at the receiver for a convolution coded modulation symbol received at the receiver;
- and
- an impulse noise predictor to predict when data frames are affected by impulse noise based upon an output of the comparator.
A DSL system comprising:
- a first transmitter-receiver device having a receiver, the receiver having an impulse noise predictor to determine if data frames are affected by impulse noise based on a comparison of soft decision data and hard decision data of a decoder at the receiver;
- and
- a second transmitter-receiver device having a transmitter.
Dependencies are inferred from the claim text.