Method for determining automatically a FEXT/NEXT transfer-function

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United States of America Patent

PATENT NO 8270311
APP PUB NO 20100208785A1
SERIAL NO

12439951

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method of automatically determining a far-end crosstalk (FEXT) and near-end crosstalk (NEXT) transfer function in communication lines such as Digital Subscriber Lines (DSL). In a first phase, an input test signal with a known power density spectrum (PSD) covering a frequency range of interest is transmitted at the near end of line A while a received signal or noise-related quantity or PSD is measured at both the near end and far end of line B. In a second phase, transmission of the test signal is stopped, and a received signal or noise-related quantity or PSD is again measured at both ends of line B. In a third phase, the FEXT/NEXT transfer function is determined based on the measurements of the first and second phases.

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Patent Owner(s)

Patent OwnerAddress
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)STOCKHOLM SWE STOCKHOLM

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dortschy, Boris Hägersten, SE 62 115
Lindqvist, Fredrik Älvsjö, SE 59 1833

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