A signal processing method, device and system

A signal processing and signal technology, which is applied in the field of data communication and can solve problems such as affecting signal transmission and high crosstalk.

Inactive Publication Date: 2020-03-10
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the industry has also begun to discuss the definition and technology of the next-generation VDSL. The original VDSL2 spectrum with a maximum of 17.664MHz has been extended to more than 30MHz. However, the high frequency spectrum will

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  • A signal processing method, device and system
  • A signal processing method, device and system
  • A signal processing method, device and system

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] In order to eliminate the crosstalk on the VDSL2 line, the network side (CO side) can perform pre-compensation on the transmitted signal according to the crosstalk parameter fed back by the user side (ie, the CPE side). This technology is called vectoring (Vectoring) processing; The device for performing vectoring processing is a Vectoring ...

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Abstract

Provided is a signal processing method, comprising: dividing a frequency band for sending a downlink synchronization symbol into at least two parts of non-overlapping frequency bands, the two parts of frequency bands being a first frequency band and a second frequency band; allocating frequency points on the first frequency band and the second frequency band to a sounding sub-carrier and a markup sub-carrier, so that the sounding sub-carrier and the markup sub-carrier distributed on the second frequency band are respectively symmetric with the sounding sub-carrier and the markup sub-carrier distributed on the first frequency band based on a symmetry point, the symmetry point being the lowest frequency point of the second frequency band, the highest frequency point of the first frequency band or one frequency point between the lowest frequency point of the second frequency band and the highest frequency point of the first frequency band; and modulating a downlink pilot frequency sequence onto the sounding sub-carrier on the first frequency band and the second frequency band and then sending same to an opposite-end device. Also provided are a signal processing apparatus and a network system.

Description

technical field [0001] The present invention relates to the field of data communication, in particular to a signal processing method, device and system. Background technique [0002] Digital Subscriber Line (DSL, Digital Subscriber Line) technology is a high-speed data transmission technology transmitted on a telephone twisted pair, such as an unshielded twisted pair (UTP, Unshielded Twist Pair). DSL technologies include Asymmetrical Digital Subscriber Line (ADSL), Very-high-bit-rate Digital Subscriber Line (VDSL), Very-high-bit-rate Digital Subscriber Line 2 (Very-high-bit- rate Digital Subscriber Line 2, VDSL2) and single-pair High-bit-rate Digital Subscriber Line (Single-pair High-bit-rate Digital Subscriber Line, SHDSL), etc. The device that provides multiple DSL access for Customer Premises Equipment (CPE) is called DSL Access Multiplexer (DSL Access Multiplexer, DSLAM), and its system connection relationship is as follows: figure 1 shown. [0003] At present, the in...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L7/00
CPCH04L5/00H04L7/00
Inventor 孙方林王祥涂建平
Owner HUAWEI TECH CO LTD
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