DMT system with variable subchannel spacing in TCM ISDN noise

Details DMT system with variable subchannel spacing in TCM ISDN noise DMT system with variable subchannel spacing in TCM ISDN noise

2008-04-01

2008-04-01

Ahn, Sam K. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

11078777

ABSTRACT:
A device comprises a first component operable to produce a plurality of discrete multitone symbols based in part on a subchannel spacing and a cyclic extension length and a second component operable to determine the subchannel spacing and the cyclic extension length, the cyclic extension length selected based on the subchannel spacing to increase the number of discrete multitone symbols transmitted during a low noise interval of a cyclostationary noise environment.

REFERENCES:
patent: 6266347 (2001-07-01), Amrany et al.
patent: 6487252 (2002-11-01), Kleider et al.
patent: 6510184 (2003-01-01), Okamura
patent: 7113549 (2006-09-01), Isaksson et al.
patent: 2003/0123383 (2003-07-01), Korobkov et al.
patent: 2003/0128835 (2003-07-01), Lee
Evans, Brian L., Introduction to ADSL Modems, Embedded Signal Processing Laboratory, The University of Texas at Austin, website.

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