Impulse noise gating in DSL systems
Embodiments of methods and apparatuses for gating impulse noise in a communication system are described. In one embodiment, a quality measure of a received signal on a communication channel is not adjusted when corruption by impulse noise in the received signal is detected. In another embodiment, tuning parameters of a DSL modem are not adjusted when corruption by impulse noise in the received signal is detected.
1 . A method, comprising:
determining a quality measure of a received signal on a communication channel; and
preventing an adjustment of the quality measure upon detecting corruption by impulse noise in the received signal.
2 . The method of claim 1 , further comprising:
preventing a measurement of the received signal from being used in adjusting the quality measure.
3 . The method of claim 1 , wherein the quality measure includes one or more of a noise power measurement, a timing synchronization measurement and an equalizer accuracy measurement.
4 . The method of claim 1 , further comprising:
preventing an adjustment of communication parameters upon detecting corruption by impulse noise in the received signal.
5 . The method of claim 1 , further comprising:
adjusting the quality measure upon a lack of detecting corruption by impulse noise in the received signal.
6 . The method of claim 1 , further comprising:
determining a signal-to-noise ratio based at least detecting corruption by impulse noise in the received signal; and
performing bit-loading based on the signal-to-noise ratio.
7 . An article of manufacture, comprising:
a machine-accessible medium storing instructions that, when executed by a machine, cause the machine to perform operations comprising:
determining a quality measure of a received signal on a communication channel; and
preventing adjustment of the quality measure upon detecting corruption by impulse noise in the received signal.
8 . The article of manufacture of claim 7 , wherein the data, when accessed by the machine, cause the machine to perform operations further comprising:
preventing a measurement of the received signal from being used in adjusting the quality measure.
9 . The article of manufacture of claim 7 , wherein the quality measure includes one or more of a noise power measurement, a timing synchronization measurement, and equalizer accuracy measurement.
10 . The article of manufacture of claim 7 , wherein the data, when accessed by the machine, cause the machine to perform operations further comprising:
preventing adjustment of communication parameters upon detecting corruption by impulse noise in the received signal.
11 . The article of manufacture of claim 7 , wherein the data, when accessed by the machine, cause the machine to perform operations further comprising:
adjusting the quality measure upon a lack of detecting corruption by impulse noise in the received signal.
12 . The article of manufacture of claim 7 , wherein the data, when accessed by the machine, cause the machine to perform operations further comprising:
determining a signal-to-noise ratio based at least detecting corruption by impulse noise in the received signal; and
performing bit-loading based on the signal-to-noise ratio.
13 . An apparatus, comprising:
a multi-carrier transceiver to detect data in a multi-carrier signal, the transceiver comprising:
a detector module to detect impulse noise in a tone of the multi-carrier signal, and
a measurement and adaptation module coupled to the detector module to determine a quality measure of the multi-carrier signal, wherein the detector module prevents an adjustment of the quality measure by the measurement and adaptation module upon detecting corruption by impulse noise.
14 . The apparatus of claim 13 , wherein the measurement and adaptation module adjusts parameters of the transceiver, and wherein the detector module is further configured to prevent an adjustment of parameters of the transceiver upon detecting corruption by impulse noise.
15 . The apparatus of claim 13 , wherein the measurement and adaptation module provides adaptation and monitoring signals to the transceiver.
16 . The apparatus of claim 13 , wherein the quality measure includes one or more of a noise power measurement, a timing synchronization measurement, and an equalizer accuracy measurement.
17 . The apparatus of claim 13 , wherein the measurement and adaptation module collects information regarding the impulse noise.
18 . The apparatus of claim 13 , further comprising:
a signal to noise ratio module coupled to the detector to determine a signal-to-noise ratio based at least detecting corruption by impulse noise in the received signal; and
a bit-loading module coupled to the signal to noise ratio module to determine a bit rate based on the signal-to-noise ratio.
19 . A set top box employing a digital subscriber line modem comprising the apparatus of claim 7.