Transmission power spectrum density shaping method of digital customer vine transciever

A digital subscriber line and power spectral density technology, which is applied in multi-frequency code systems and other directions, can solve the problems of performance impact, digital subscriber line rate drop, low power spectrum utilization, etc., to improve performance and speed, simplify workload, easy-to-achieve effects

Inactive Publication Date: 2007-10-03
HUAWEI TECH CO LTD
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] This method is simpler than the first prior art in Fig. 1, but it cannot make full use of the allowable power spectrum density limit, and the power spectrum utilization rate is low. There is still a large difference between the obtained PSD value and the actual obtained PSD value, which affects the performance, so the rate of the digital subscriber line may be greatly reduced

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transmission power spectrum density shaping method of digital customer vine transciever
  • Transmission power spectrum density shaping method of digital customer vine transciever
  • Transmission power spectrum density shaping method of digital customer vine transciever

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0054] In ADSL2, the rated PSD value and reference PSD value are defined for each annex (Annex). If there is no special requirement, the rated PSD value is used before channel discovery (Channel Discovery) and channel discovery, and the reference PSD value is used after channel discovery. PSD value. Both the rated PSD value and the reference PSD value are used to limit the transmit power spectral density of the digital subscriber line transceiver, which is recorded as a limit (limited) PSD value.

[0055] The basic principle of the digital subscriber line transceiver transmission power spectral density shaping method of the present invention is: in the entire specified power spectrum frequency band, for the frequency band part that needs to be specially set for the user's attention, the PSD value set by the user is used, and the user does not n...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

This invention discloses a method for shaping spectral density of transmitting power of a digital user line transceiver including: applying an interpolating method to calculate power spectral density based on a standard stipulation to the frequency bands without power spectral density in the transmitted band sphere of a transceiver, in which, users applying the shaping method can set power spectral density at the bands without power spectral density.

Description

technical field [0001] The invention relates to a method for shaping the transmission power spectrum density, in particular to a method for shaping the transmission power spectrum density of a digital subscriber line transceiver. Background technique [0002] After years of development, asymmetrical digital subscriber line (ADSL) technology has developed from the first generation of ADSL to the current second generation of asymmetrical digital subscriber line (Second Generation ADSL, ADSL2), downlink bandwidth expansion The second-generation asymmetric digital subscriber line (Extend Down Stream Band with ADSL2, ADSL2+) and the updated second-generation very high-speed digital subscriber line (Very-high-bit-rate DSL 2, VDSL2), various types of DSL The technology is collectively referred to as xDSL. The frequency band used by xDSL is gradually increasing, and the corresponding bandwidth is also gradually increasing. ADSL and ADSL2 downlink use spectrum below 1.1MHz to provi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 方李明梁勇未海洪
Owner HUAWEI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap