Method for crosstalk suppression in logout of subscriber in digital subscriber line system

The invention discloses a method for crosstalk suppression in the logout of a subscriber in a digital subscriber line system. The automatic updating of a crosstalk filtering matrix after the logout of the subscriber is realized by fully utilizing conventional channels and the information of a crosstalk filter which is the crosstalk filtering matrix before the logout of the subscriber, and crosstalk interference in a transmitted signal transmitted by the subscriber in a transmission process is suppressed by utilizing the updated crosstalk filtering matrix, thereby completely suppressing the crosstalk interference under a new interference environment after the logout of the subscriber and further improving the transmission performance of the channels. Moreover, by the method provided by the invention, the repeated use of a conventional zero-forcing algorithm for suppressing the crosstalk interference under the new interference environment after the logout of the subscriber is avoided, so computational complexit