METHOD OF CROSS-BARRIER PRELIMINARY CODER TRAINING ERROR ERROR IN CHANNELS WITH PULSE NOISE

摘要

1. A crosstalk training system comprising a first transceiver at a CO central station connected to a second transceiver (204) on equipment in a CPE user area via a DSL digital subscriber line; a preliminary crosstalk encoder (208) connected to the first CO transceiver; and a vectorization control object VCE (209) connected to a transceiver via a feedback channel and to a crosstalk precoder (208), the second transceiver (204) comprising a noise recorder (205) configured to detect noise not related to crosstalk in the downstream signal from CO to CPE, while the first transceiver is configured to receive, instead of the measured error value, a predetermined special feedback signal from the second transceiver (204), which indicates flushes of whether noise is detected that is not associated with the crosstalk in the downstream signale.2. The crosstalk training system according to claim 1, wherein the downlink signal contains a discrete multi-tone modulation symbol DMT that contains a plurality of tones, wherein the error feedback signal contains a plurality of error vectors that correspond to tones, and each of the error vectors contains a valid a component that contains the number of bits, and an imaginary component that contains the number of bits. 3. The crosstalk training system according to claim 2, wherein the bits in the real component and the imaginary component of the error vector are set to a special predetermined value when in a tone that corresponds to