Pulse or digital communications – Transceivers – Modems
Reexamination Certificate
2007-08-07
2007-08-07
Kumar, Pankaj (Department: 2611)
Pulse or digital communications
Transceivers
Modems
Reexamination Certificate
active
11235729
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.
REFERENCES:
patent: 5852633 (1998-12-01), Levin et al.
patent: 6134274 (2000-10-01), Sankaranarayanan et al.
patent: 6275522 (2001-08-01), Johnson et al.
patent: 6456657 (2002-09-01), Yeap et al.
Miller II Robert Raymond
Sonalkar Ranjan V.
AT&T Corp.
Kumar Pankaj
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