Real-time formation of optimal power spectral density masks

Details Real-time formation of optimal power spectral density masks Real-time formation of optimal power spectral density masks

2011-07-05

2011-07-05

Lee, John (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

With control signal

C455S522000, C455S423000, C455S067110

Reexamination Certificate

active

07974583

ABSTRACT:
A technique for real-time formation of optimal power spectral density masks is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for real-time formation of optimal power spectral density masks. The method may comprise sensing line conditions in a communication medium, wherein the communication medium is capable of carrying signals in a plurality of tones. The method may also comprise determining, in real-time, one or more power spectral density masks that substantially optimize transmissions of the signals in the plurality of tones. The method may further comprise transmitting the signals in the plurality of tones based on the one or more power spectral masks.

REFERENCES:
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patent: 2002/0044597 (2002-04-01), Shively et al.
Ranjan V. Sonalkar, David Applegate: “Shannon Capacity of Frequency-Overlapped Duplex DSL Channels,”IEEE International Conference on Communications, (ICC), 2002.
Wei Yu, John Cioffi: “On Constant-Power Waterfilling,”IEEE International Conference on Communications, (ICC), 2001.
Annex L in ITU-T Recommendation G.992.3, “Amendment 2 (Amendment to Annex J and Draft new Annexes L and M) to Recommendation G.992.3,” Apr. 2004.

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