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Method and device for processing data and a communication system comprising such device

A technology of data, processor unit, applied in the field of communication system

Inactive Publication Date: 2010-10-20
NOKIA NETWORKS OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The problem to be solved is to overcome the deficiencies pointed out before and in particular to provide an effective method to reduce the extraneous noise on the communication channel

Method used

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  • Method and device for processing data and a communication system comprising such device
  • Method and device for processing data and a communication system comprising such device
  • Method and device for processing data and a communication system comprising such device

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Embodiment Construction

[0042] The reciprocity theorem of electromagnetic wave propagation states that the channel between two antennas is equivalent for the pair of receiving and submitting antennas (see [1] for details). This approach may not be suitable for crosstalk situations in DSL loops, since each defined pair contains two antennas impedance-coupled to the termination. Since the termination impedance depends on the link status of the CPE, DSL crosstalk may not be consistent with the proposed reciprocity method.

[0043] However, with respect to the NEXT coupling of loops that are not too short (ie the potential reflection should be less correlated than the NEXT coupling itself), the reciprocity method can advantageously be applied.

[0044] Preferably, unconnected ports (for any reason) can be ignored for MIMO signal processing.

[0045] For FEXT coupling and considerable loop length differences, reciprocity is not an admissible approximation. figure 2 Shown is a central office (CO) connec...

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Abstract

A method and a device are provided for processing data transmitted via a channel, wherein said channel is at least partially represented by a symmetrical transfer matrix, wherein at least one off-diagonal matrix element of the transfer matrix is determined by its symmetric and / or transposed off-diagonal matrix element and its corresponding diagonal matrix elements of the transfer matrix. In addition, a communication system is provided comprising such device.

Description

technical field [0001] The invention relates to a method and a device for processing data and a communication system comprising the device. Background technique [0002] DSL, or xDSL, is a family of technologies that provide digital data transmission over the wires of a local telephone network. [0003] Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that provides faster data transmission over copper telephone lines than traditional voice-band modems. This fast transmission is achieved by utilizing frequencies not normally used for voice telephone calls, in particular, frequencies above the average human hearing. [0004] VDSL (Very High Speed ​​DSL) is an xDSL technology that provides faster data transmission over a single twisted pair. High bit rates are achievable at a range of about 300 meters (1000 feet), which allows symmetric access of 26Mbit / s or asymmetric access of up to 52Mbit / s downstream - 12Mbit / s upstream. [000...

Claims

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Application Information

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IPC IPC(8): H04M3/30
CPCH04M3/34H04M3/18H04M3/2209
Inventor D·格尼格罗斯W·科泽克J·米克
Owner NOKIA NETWORKS OY