Alcatel Lucent

Alcatel-lucent USA Inc.

Michael Peeters

Jochen Maes

Mamoun Guenach

Jan Sylvia Verlinden

Adriaan J De Lind Van Wijngaarden

Philip Alfred Whiting

Dirk Vanderhaegen

Hungkei Keith Chow

Gerhard Guenter Theodor Kramer

Miroslav Zivkovic

Geert Bert Ysebaert

Luc Vandendorpe

Jerome Louveaux

Jan Verlinden

Maumoun Guenach

The invention pertains to a method and apparatus for testing a component of a vectoring system, such as a DSLAM performing crosstalk cancellation. The method is based on the insight that line termination equipment, such as a DSLAM, and in particular the crosstalk canceller, can be used to simulate a multiline network. A signal is exchanged between the line termination equipment and attached network termination equipment, passing through the crosstalk canceller which acts as a multiline simulator. Information indicative of an error component in a received version of the signal is used to assess the operation the vectoring system.

Method for testing a component of a vectoring system and line termination equipment configured to carry out said method

In one embodiment, the line termination card includes a data output terminal configured to output a data sequence. The card further includes a vectoring entity configured to parse and encode the data sequence into frequency samples according to a carrier loading parameter, configured to scale the frequency samples into scaled frequency samples according to a carrier scaling parameter, and, configured to process the scaled frequency samples for crosstalk compensation. A controller is configured to adjust the carrier loading parameter and the carrier scaling parameter, and a forwarder is coupled to the data output terminal and to the controller. The forwarder is configured to forward the data sequence, the carrier loading parameter and the carrier scaling parameter towards a further line termination card.

Joint signal processing across a plurality of line termination cards

The present invention relates to a method for configuring communication parameters for communication through a first multi-carrier data communication path (DPx) established over a first subscriber line (Lx), and comprising the steps of: A method according to the invention further comprises the steps of: The present invention also relates to an access node.

Method and apparatus for configuring a multi-carrier data communication path

The present invention relates to a device () comprising an interface to at least one active subscriber line () and an interface to at least one inactive subscriber line (). The device () comprises means for transmitting a first signal on the inactive subscriber line () and means for synchronously measuring crosstalk () induced into the active subscriber line () by transmitting the first signal on the inactive subscriber line ().

Device and associated method for measuring crosstalk

A method involves performing a plurality of acts. The acts include transmitting a first signal stream to a first channel of a multi-channel communications medium while transmitting a second signal stream to a different second channel of the medium. The second signal stream is substantially temporally correlated to the first signal stream. The method includes receiving an SINR measured at a receiver configured to receive signals from the first channel. The SINR is measured while the receiver received the first signal stream. The method includes determining a channel matrix element between the first and second channels or a ratio of said channel matrix element to a diagonal element of the channel matrix. The act of determining is based on the received SINR.

Determining channel matrices by correlated transmissions to different channels

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Lint, Belgium

Michael Peeters