Power allocation scheme for DMT-based modems employing...

Details Power allocation scheme for DMT-based modems employing... Power allocation scheme for DMT-based modems employing...

2007-06-28

2010-02-09

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Transceivers

Modems

Reexamination Certificate

active

07660347

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: 6275522 (2001-08-01), Johnson et al.

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