Transmit spectrum for a digital subscriber line signal

Details Transmit spectrum for a digital subscriber line signal Transmit spectrum for a digital subscriber line signal

2007-04-18

2010-11-16

Corrielus, Jean B (Department: 2611)

Pulse or digital communications

Transceivers

Modems

C375S225000, C370S201000

Reexamination Certificate

active

07835429

ABSTRACT:
A technique to shape the transmit spectrum for a digital subscriber line modem includes utilizing information indicative of crosstalk into the line of another modem. The transmit spectrum is divided by an adjustable transition frequency into a lower frequency region and a mask region. Crosstalk information about the line of the other modem is obtained and the transition frequency and the low frequency region power spectral density are adjusted to account for the data rates of both modems.

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