FIELD: radio engineering, communication.
SUBSTANCE: crosstalk training system comprises a first transceiver at a central office (CO) connected to a second transceiver (204) at customer premise equipment (CPE) via a digital subscriber line (DSL), a crosstalk precoder (208) connected to the first transceiver at the CO, and a vectoring control entity (VCE) (209) connected to the second transceiver (204) via a feedback channel and to the crosstalk precoder (208), wherein the second transceiver (204) comprises a noise monitor (205) configured to detect non-crosstalk noise in a downstream signal from the CO to the CPE, the VCE (209) is configured to receive a predefined feedback signal from the second transceiver (204) which indicates whether non-crosstalk noise is detected in the downstream signal, and wherein the VCE (209) restricts the crosstalk precoder (208) from updating a precoding coefficient which corresponds to an error feedback signal which indicates detection of non-crosstalk noise.
EFFECT: reduced crosstalk in a DSL.
15 cl, 5 dwg
