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1. (WO2010118665) METHOD AND APPARATUS FOR CONFIGURING VIRTUAL NOISE PARAMETERS OF VERY HIGH SPEED DIGITAL SUBSCRIBER LINE

Pub. No.:    WO/2010/118665    International Application No.:    PCT/CN2010/071565
Publication Date: Fri Oct 22 01:59:59 CEST 2010 International Filing Date: Wed Apr 07 01:59:59 CEST 2010
IPC: H04M 11/00
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
WEI, Dong
LIU, Lihe
Inventors: WEI, Dong
LIU, Lihe
Title: METHOD AND APPARATUS FOR CONFIGURING VIRTUAL NOISE PARAMETERS OF VERY HIGH SPEED DIGITAL SUBSCRIBER LINE
Abstract:
An apparatus comprising a transmitter configured to transmit a digital subscriber line (DSL) signal in a line from a plurality of subscriber lines according to a reference virtual noise power spectral density (PSD), wherein the reference virtual noise PSD is based on an upper bound for a worst-case far-end crosstalk (FEXT) PSD in the subscriber lines. Also included is an apparatus comprising at least one processor configured to implement a method comprising obtaining an upper bound for a worst-case FEXT PSD for a plurality of subscriber lines, obtaining a referred virtual noise PSD based on the worst-case FEXT PSD for the lines, and determining a bit-loading for the lines based on the referred virtual noise or a scaled version of the receiver-referred virtual noise.