Pulse or digital communications – Transceivers – Modems
Reexamination Certificate
2005-12-06
2005-12-06
Ghayour, Mohammed (Department: 2631)
Pulse or digital communications
Transceivers
Modems
Reexamination Certificate
active
06973122
ABSTRACT:
The present invention provides a method, apparatus and computer readable medium for allocation of an available power to Discrete Multi-Tone (DMT) frequency tones in a DMT-based Digital Subscriber Line (DSL) modem. In one embodiment, the method includes the steps of: initializing the DMT-based DSL modem by calculating aggregate values of channel attenuation, noise power, and power mask; pre-filtering to flag noisy bins that are unable to support a minimum number of bits with the maximum power available for transmission in a bin; and using a repeated-bisection splitting scheme to allocate the available power substantially optimally among a plurality of bands for DMT frequency tones.
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Miller II Robert Raymond
Sonalkar Ranjan V.
AT&T Corp.
Ghayour Mohammed
Kumar Pankaj
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