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Methof for simulating return loss of twisted-pairs in designing high-speed data communication system

A return loss, communication system technology, used in transmission systems, wired transmission systems, line transmission components, etc.

Inactive Publication Date: 2003-10-08
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current model can only allow us to evaluate the signal return loss on the twisted pair, which obviously does not meet the requirements.

Method used

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  • Methof for simulating return loss of twisted-pairs in designing high-speed data communication system
  • Methof for simulating return loss of twisted-pairs in designing high-speed data communication system
  • Methof for simulating return loss of twisted-pairs in designing high-speed data communication system

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Embodiment

[0037] For a channel consisting of two connectors and a twisted pair ( Figure 6 shown), wherein the length of the five types of twisted pair is 100 meters, and the high-frequency progressive value of its characteristic impedance is 103 ohms, adopting the model (5) formula that the present invention introduces the structural return loss, and is designed to be corresponding Effective filter, the order of the filter is 8th order. The basic parameters of the five types of twisted-pair cables and connectors are as follows: five types of twisted-pair cables:

[0038] 1 time delay (ns / 100m): τ = cons + 36 / f - - - ( 5 ) In the formula, 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 ...

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Abstract

First, the method builds the new return loss model with the structure loss being added 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 return loss of twisted-pair wires in the design of high-speed data communication systems 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 system. This...

Claims

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Application Information

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IPC IPC(8): H04B3/20H04B3/493
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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