VECTORED DSL CROSSTALK CANCELLATION

摘要

A vector DSL system includes a plurality of modems, which may be multi-port devices. Unprocessed user data is extracted from the modems and passed through a private vectoring data routing apparatus to one or more vectoring modules, such as vectoring cards. Each vectoring module includes one or more vector processors that include processing units configured to process the unprocessed user data on the basis of all modems' data for a given DSL tone grouping. Processing of the unprocessed user data removes the effects of FEXT from upstream and downstream user data and returns the processed user data to the modems using the vectoring data routing apparatus, which can be a specialized data transmission network utilizing one or more vector routers.

主权项

1. A method for removing crosstalk interference in a vectored digital subscriber line (DSL) system, the method comprising:
extracting unprocessed user data from a vectoring group comprising a plurality of DSL ports implemented by one or more upstream-end DSL modems, wherein the unprocessed user data comprises frequency domain data in one or more DSL ports; transmitting the extracted unprocessed user data over a vector data network to a vectoring control entity (VCE), wherein transmitting includes routing the extracted unprocessed user data between a vector router pair in the vector data network, the vector router pair comprising vector routers respectively associated with the vectoring group and the VCE; generating, by the VCE, processed user data by processing the unprocessed user data to perform crosstalk cancellation using far-end crosstalk (FEXT) cancellation data and the unprocessed user data for the vectoring group; and transmitting the processed user data via the vector data network from the VCE to the plurality of DSL ports from which the unprocessed user data was extracted, wherein the steps of extracting and transmitting are performed with new unprocessed user data each discrete multitone (DMT) symbol period of the vectored DSL system.