Method for simulating cross talk loss at far and near ends of twisted-pairs in designing high-speed data communications system

A communication system and high-speed data technology, applied in the field of communication, can solve problems such as non-compliance

Inactive Publication Date: 2003-10-08
FUDAN UNIV
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But as a model for high-frequency syste

Method used

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  • Method for simulating cross talk loss at far and near ends of twisted-pairs in designing high-speed data communications system
  • Method for simulating cross talk loss at far and near ends of twisted-pairs in designing high-speed data communications system
  • Method for simulating cross talk loss at far and near ends of twisted-pairs in designing high-speed data communications system

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Embodiment

[0046] The length of two pairs of Category 5 twisted-pair cables is 100 meters, and their other basic parameters are as follows:

[0047] 1. Time delay (ns / 100m): τ = cons + 36 / f Among them, cons is a time delay constant, and for the five types of twisted pair, its maximum value is: cons=534ns. 2. Phase constant (rad / m): β = 2 πf × τ / 10 5

[0048] 3. Attenuation constant (Nep / m): α = ( 1.967 f + 0.023 f + 0.005 / f ) × 0.01 / 8.686

[0049] 4. Propagation constant (rad / m):

[0050] γ=α+jβ

[0051] 5. Charact...

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Abstract

First, the method builds the model of the new cross talk loss at far and near ends of twisted-pairs so as to obtain the amplitude information and the phase information of the return loss so that the result with more truthfulness is gotten. Then, the design of equivalent electric circuit elements is carried out for the said information in order to embed the designed elements into entire design system to execute the system simulation. The invention shortens system design cycle greatly and raises accuracy of designs.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for simulating the far-near end crosstalk loss of a twisted pair in the design of a high-speed data communication system. Background technique [0002] With the continuous development of computer network technology and network equipment, the problem of physical channels between network equipment is becoming more and more important. At present, physical channels mainly include twisted pair wires, optical fibers, and coaxial cables. Among them, the cheap and good-quality twisted pair is an excellent choice for setting up a LAN with a range of 100 meters. Therefore, 100BASET and 1000BASET use five or more twisted pairs as the physical transmission medium. [0003] However, with the increase of the transmission distance, various interferences on the signals on the five types of twisted pair lines also increase, thus affecting the performance of the entire...

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Application Information

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IPC IPC(8): H04B3/30H04B3/40H04B3/487
Inventor 陈宰曼来金梅叶凡任俊彦沈泊郑增钰陆正毅王煜
Owner FUDAN UNIV
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