Patent ID: 9020017
Filing Date: 2015-04-28
Classification: H04B,H04M

Abstract:
1. A signal processing method, comprising: sending, by a digital subscriber line access multiplexer DSLAM, through a first user port, a crosstalk detection signal in a connected line, and receiving, by the DSLAM, through a second user port, an error sample of an actual downlink signal fed back by a terminal side in another connected line connected to the second user port, wherein the actual downlink signal comprises far-end crosstalk imposed by the crosstalk detection signal to the line connected to the second user port; and estimating, by the DSLAM, according to the error sample of the actual downlink signal and the crosstalk detection signal, a coefficient of a pre-coder of the DSLAM to obtain an estimated coefficient of the pre-coder; sending, by the DSLAM, through the first user port, a single end line test SELT signal, wherein the coefficient of the pre-coder is used to cancel far-end crosstalk on the line connected to the second user port when the first user port sends the SELT signal.