Method, system and device for enhancing stability of frequency spectrum control

Abstract

The embodiment of the invention discloses a method, a system and a device for enhancing the stability of frequency spectrum control. The method comprises the following steps: selecting a subcarrier, and acquiring a sending power spectrum amplitude-frequency curve, wherein the selected subcarrier is not limited by the power spectrum amplitude-frequency curve; and acquiring pilot frequency accordingto the selected subcarrier so as to enhance the stability of the frequency spectrum control. The embodiment of the invention reserves sufficient signal-to-noise ratio for the subcarrier with the pilot frequency by comprehensively considering the power frequency spectrum control and the channel quality of the subcarrier with the pilot frequency so that lines can complete more accurate timing synchronization at a showtime stage so as to ensure the effectiveness and the stability of power frequency spectrum control.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, system and device for improving spectrum control stability. Background technique [0002] xDSL (Digital Subscriber Line, Digital Subscriber Line) is a high-speed data transmission technology transmitted over telephone twisted pair lines. With the increase of the frequency band used by xDSL, the problem of high-frequency crosstalk becomes increasingly prominent. When multiple users in a bundle of cables need to open xDSL services, the rate of some lines will become lower, the performance will become unstable, and even the opening will not be possible due to crosstalk problems, which will eventually lead to DSLAM (Digital Subscriber Line Access Multiplexer, digital subscriber line access multiplexer) has a relatively low outgoing rate. [0003] There are multiple pairs of twisted pairs on the user's cable, and various services may run on each twisted pair....

AI Technical Summary

Problems solved by technology

[0005] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems: the prior art did not take into account the impact of spectrum control on the subcarrier where the pilot is located, and the pilot is closely related to timing synchronization, and then when When the spectrum control is strict, the actual line will continue to display abnormal statistics such as correctable seconds, error seconds, and serious error seconds in the time display stage of the showtime. Phenomenon

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