Signal processing method, device and system

摘要

A signal processing method, device, and system are provided. The method includes: sending, through a first user port, a crosstalk detection signal in a connected line, and receiving, through a second user port, an error sample of an actual downlink signal fed back by a terminal side in a connected line; and estimating, according to the actual downlink signal and the crosstalk detection signal, a coefficient of a pre-coder of a DSLAM to obtain an estimated coefficient of the pre-coder, where 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 an SELT signal.

主权项

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.