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An "Encoder" Design Method for Eliminating Steady State Crosstalk at the Far End of Transmission Lines

A design method and transmission line technology, which is applied in the field of signal denoising, can solve problems such as complex methods, and achieve the effects of simplifying methods, eliminating design, and eliminating far-end crosstalk

Inactive Publication Date: 2019-05-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The existing method of eliminating crosstalk through coding is to set encoders and decoders at the near-end and far-end ports of the transmission line, which is relatively complicated.

Method used

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  • An "Encoder" Design Method for Eliminating Steady State Crosstalk at the Far End of Transmission Lines
  • An "Encoder" Design Method for Eliminating Steady State Crosstalk at the Far End of Transmission Lines
  • An "Encoder" Design Method for Eliminating Steady State Crosstalk at the Far End of Transmission Lines

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Embodiment Construction

[0042] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] Such as figure 1 shown, where U S is the supply voltage, R S and R L are the source and load resistors, respectively.

[0044] First, the actual structure of the transmission line is modeled and simulated, and the electromagnetic parameters of the transmission line are analyzed using the electromagnetic parameter extraction tool to obtain the transmission line electromagnetic parameter matrix per unit length of the transmission line: the inductance matrix L and the capacitance matrix C. In this way, the transmission line impedance matrix can be expressed as Z=jωL, and the admittance matrix is ​​Y=jωC. Then you can get:

[0045] P -1 YZP=γ 2

[0046] In the above formula, γ 2 is a diagonal matrix whose diagonal elements are the characteristic roots of the matrix YZ, and P is a matrix composed of eigenvectors corresponding to ...

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Abstract

The invention discloses a method of designing an ''encoder'' to eliminate the steady-state crosstalk at the far-end of a transmission line. Firstly, a model of the actual structure of the transmission line is established. The electromagnetic parameter matrix and the chain parameter matrix of the transmission line are extracted to obtain the functional relationship between the voltage and current of the near-end port and those of the far-end port of the transmission line. Secondly, the voltage of the power supply is sampled and converted into the frequency domain. Lastly, according to the functional relationship between the voltage and current of the near-end port and those of the far-end port, the functional relationship between the voltage of the near-end port and the voltage of the power supply and the task of the ''encoder'', the ''encoder'' can be solved and is injected into the near-end port of the transmission line according to the voltage or current injection mode to eliminate the steady-state crosstalk at the far-end of the transmission line. This invention only sets the ''encoder'' at the near-end port of the transmission line and does not require setting of the ''decoder'' at the far-end port of the transmission line, thus the design method is simplified.

Description

technical field [0001] The invention belongs to the technical field of signal denoising, and in particular relates to an "encoder" design method for eliminating the steady-state crosstalk at the far end of a transmission line. Background technique [0002] Data transfer rates and clock speeds are steadily increasing as electrical and electronic equipment continues to be miniaturized. However, the close distance and high frequency bring unfavorable near-field interference to the transmission lines—crosstalk, which refers to unintentional electromagnetic coupling between transmission lines that are close to each other. In a limited space, electromagnetic energy in a large number of transmission lines flows into each other in the form of noise, causing mutual interference within the system, which will seriously affect the electromagnetic compatibility of electrical equipment. [0003] At present, there are many methods of crosstalk suppression. Some suppression methods are bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F30/30
Inventor 王世山张昭娄千层高欣欣
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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