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Network device with far-end interference elimination function

A network device, crosstalk elimination technology, applied in transmitter/receiver shaping network, reducing crosstalk, line transmission components, etc., can solve problems such as excessive deviation, unstable filtering noise, etc.

Active Publication Date: 2009-10-28
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since far-end crosstalk cancellers are installed at both the sending end and the receiving end, and the far-end crosstalk cancellers at both ends are used at the same time in the prior art when dealing with far-end crosstalk, the power consumed by the communication system as a whole will become one Potential problems, and the coefficients referenced by the far-end crosstalk canceller at the receiving end will deviate too much during the continuous crosstalk cancellation process, resulting in unstable filtered noise

Method used

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Embodiment Construction

[0025] In order to illustrate the technical characteristics of the present invention to deal with far-end crosstalk, first in figure 1 The far-end crosstalk model of the transmitting end in the network device provided by the present invention is disclosed in . Please refer to figure 1 , the sending end 100 of the network device includes a first channel 104, a first far-end crosstalk coupling 106, a first adder 110, a first THP (Tommlison-Harashima precoding, Tomlison-Harashima Precoding) filter 122, a second channel 114 , the second far-end crosstalk coupling 116 , the second adder 120 , and the second THP filter 132 . Wherein, the first THP filter 122 and the second THP filter 132 are enabled or disabled according to different operation modes of the network device. Please note that because in some situations, the first THP filter 122 and the second THP filter 132 need to be enabled or disabled, both are enabled or disabled by the switch signal sel_THP. In other words, the ...

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Abstract

The invention provides a network device with a far-end interference elimination function. When the network device is in a training mode, the network device provides hard data to a far-end interference eliminator for performing far-end interference elimination; and when the network device is in a data mode, the network device provides soft data to the far-end interference eliminator for performing far-end interference elimination so as to achieve the effect of effectively eliminating far-end interference and reduce the power consumption of the network device.

Description

technical field [0001] The invention discloses a network device, in particular a network device with the function of eliminating far-end crosstalk. Background technique [0002] In a general communication system, a transmitter (Transmitter) and a receiver (Receiver) include at least one channel. Signals between different channels included in the same sending end or the same receiving end will interfere with each other, that is, the first channel on the same sending end or the same receiving end will be interfered by the signal on the second channel and have The phenomenon of noise is called crosstalk (Crosstalk). Crosstalk includes Near end crosstalk (NEXT) and Far end crosstalk (FEXT). Far end crosstalk refers to the crosstalk phenomenon generated between different channels at the sending end, and this The crosstalk phenomenon will further affect the signal quality at the receiving end. [0003] Generally, in the technology of eliminating far-end crosstalk, a precode FEX...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04B3/32H04B3/14
Inventor 施至永黄亮维郭协星
Owner REALTEK SEMICON CORP
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