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1. (WO2018041833) METHOD AND APPARATUS FOR TRANSMITTING DATA OVER METALLIC WIRE PAIRS

Pub. No.:    WO/2018/041833    International Application No.:    PCT/EP2017/071667
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Wed Aug 30 01:59:59 CEST 2017
IPC: H04B 3/32
H04B 7/02
Applicants: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
Inventors: AL RAWI, Anas
BOTHAM, Christopher
Title: METHOD AND APPARATUS FOR TRANSMITTING DATA OVER METALLIC WIRE PAIRS
Abstract:
A method of transmitting, using a discrete multi-tone technique, data between a first (16) and a second (26) transceiver over a plurality of metallic pairs (31, 32), connected between the first and second transceivers, providing a plurality of transmission channels, the method comprising: receiving at the first transceiver a data stream d1 for transmission to the second receiver; generating from the data stream a main transmission signal for transmission over one of the transmission channels operating as a main transmission channel, generating from the data stream an auxiliary transmission signal for transmission over another one of the transmission channels operating as an auxiliary transmission channel, receiving at the second transceiver from the main transmission channel a main received signal and receiving at the second transceiver from the auxiliary transmission channel an auxiliary received signal; and processing the received main and auxiliary signals in order to recover the data stream received at the first transceiver; wherein the auxiliary transmission signal is generated in dependence upon a measurement of the cross-talk coupling from the point of transmission from the first transceiver onto the auxiliary transmission channel to the point of reception at the second transceiver from the main transmission channel and wherein the processing of the received main and auxiliary signals is done in dependence upon measurements of the cross-talk coupling from the point of transmission from the first transceiver onto the main transmission channel to the point of reception at the first transceiver from the auxiliary transmission channel and/or vice versa, and of the cross-talk coupling from the point of transmission from the second transceiver onto the main transmission channel to the point of reception at the second transceiver from the auxiliary transmission channel.