Crosstalk estimation method, device and system

Abstract

The invention provides a crosstalk estimation method, device and system. In the crosstalk processing method, device, and system provided by the embodiments of the present invention, the transceivers of the lines respectively generate pilots in different spectrum ranges that meet the preset relationship with the pilot training signals of other lines according to the pilot sequences allocated by the vectoring control entity. Frequency training signal, so that the receiver of the line can determine the sample error according to different pilot training signals, so that the vectorization control entity can determine the crosstalk channel coefficient of the in-band spectrum and out-of-band spectrum of other lines to the line, so that by Precoding the data signal to be sent on this line can eliminate the influence of other lines on the crosstalk between the in-band and out-of-band spectrum of the line, and reduce the impact of crosstalk between lines on the line rate in a system where lines with different attributes coexist. Influence, thereby increasing the effect and stability of FTTC speed-up.

Description

Technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular to a method, device and system for estimating crosstalk. Background technique [0002] Digital Subscriber Line (x Digital Subscriber Line, xDSL for short) is a high-speed data transmission technology that is transmitted on a telephone twisted pair (Unshielded Twist Pair, UTP for short). The passband transmission of xDSL uses frequency division multiplexing technology to make xDSL and the traditional telephone service (Plain Old Telephone Service, referred to as POTS) coexist on the same pair of twisted pairs. Among them, xDSL occupies a high frequency band and POTS occupies less than 4 kilohertz (KHz) In the baseband part, at the signal receiving end, a splitter is used to separate the POTS signal and the xDSL signal. The system that provides multiple xDSL access is called DSL Access Multiplexer (DSL Access Multiplexer, DSLAM for short). [0003] Du...

AI Technical Summary

Problems solved by technology

[0007] Embodiments of the present invention provide a crosstalk estimation method, device and system, which are used to solve the problem that FEXT crosstalk between two groups of lines with different attributes affects the effect and stability of FTTC speed-up in the existing Vector system

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