Title:
SYSTEM, METHOD AND APPARATUS FOR CROSSTALK CANCELLATION
Document Type and Number:
WIPO Patent Application WO2005036761
Kind Code:
A3
Abstract:
The present invention effectively cancels echo, near-end crosstalk and far-end crosstalk. A FEXT canceller is placed at the transmitter rather than at the receiver according to an aspect of the invention. In some embodiment, a FEXT canceller can be placed at the receiver only or the combination of both ends. The FEXT canceller is continuously adapted with information sent back from a remote receiver and with data from a neighbor transmitter that causes the crosstalk at the remote receiver. This allows the FEXT canceller to quickly adapt to a change in crosstalk function or conditions with the surrounding environment, for example, aging, temperature, humidity, physical pressure, etc. In some embodiments, an adaptation control signal is sent back from the receiver to the transmitter by using an overhead bit in the frame format. In some embodiments, part of the FEXT canceller is built-in at the remote receiver.
Inventors:
TAKATORI HIROSHI (US)
DYER KENNETH C (US)
CALLICOTTE MARK (US)
DYER KENNETH C (US)
CALLICOTTE MARK (US)
Application Number:
PCT/US2004/033618
Publication Date:
October 12, 2006
Filing Date:
October 06, 2004
Export Citation:
Assignee:
KEYEYE (US)
International Classes:
H04B1/38; H04B1/58; H04B3/20; H04B3/32
Foreign References:
| US6934387B1 | 2005-08-23 | |||
| US7023908B2 | 2006-04-04 | |||
| US20050099967A1 | 2005-05-12 |
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