Multiple passive intermodulation generation points positioning method based on matrix pencil method

A technology of passive intermodulation and positioning method, which is applied in transmission monitoring, electrical components, transmission systems, etc., and can solve problems such as passive intermodulation effects that cannot be ignored and system collapse.

Inactive Publication Date: 2016-09-21
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In the case of low power, the passive intermodulation effect can be ignored, but in the case of high power, the passive intermodulation effect cannot be ignored, and it may cause the entire system to collapse in severe cases

Method used

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  • Multiple passive intermodulation generation points positioning method based on matrix pencil method
  • Multiple passive intermodulation generation points positioning method based on matrix pencil method
  • Multiple passive intermodulation generation points positioning method based on matrix pencil method

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0047] Such as figure 1 Shown, embodiment of the present invention is as follows:

[0048] 1) Under the same reference signal source, inject two coherent signal sources into the device under test that generates passive intermodulation, multiple passive intermodulation signals generate a composite signal at the port, and measure the amplitude of the signal through a circuit or instrument A and phase recorded as

[0049] 2) Sweep the frequency of one of the coherent signal sources at equal intervals, and the total number of sweep points is m. For the i-th sweep, a series of amplitude A(i) and phase Recorded as:

[0050]

[0051] Among them, k is the wave vector corresponding to the lowest frequency, and Δk is the wave vector corresponding to the sweep interval bandwidth.

[0052] After sweeping at equal intervals, the obtained series of single-frequency complex signals are written in the following form:

[0053]

[0054] Among them, y(i), y(k+iΔk) is the noise-add...

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Abstract

The invention discloses a multiple passive intermodulation generation points positioning method based on a matrix pencil method, two coherent signal sources are put in a to-be-detected device to generate a plurality of passive intermodulation signals which are combined as one composite signal, and the amplitude and the phase of the signal are measured and obtained; the scanning frequency is measured for several times, the amplitude and the phase data of the composite signal are obtained and processed, the matrix pencil method is utilized to obtain the approximate position and the relative amplitude, a passive intermodulation generation threshold value is utilized to acquire the quantity of the generation points and the position information. According to the invention, under the prior condition of no need for having the possible position or quantity of passive intermodulation, the position information and amplitude of the passive intermodulation generation points can be accurately judged, a problem for positioning a plurality of passive intermodulation points can be effectively solved, and the method has robustness for noise.

Description

technical field [0001] The invention relates to a passive intermodulation positioning method, in particular to a positioning method for multiple passive intermodulation occurrence points based on a matrix beam method. Background technique [0002] Passive intermodulation refers to the passive intermodulation phenomenon caused by two or more carrier signals due to the nonlinear factors of passive devices. In the case of low power, the passive intermodulation effect can be ignored, but in the case of high power, the passive intermodulation effect cannot be ignored, and it may cause the entire system to collapse in severe cases. In recent years, with the development of high-power and broadband wireless communication technology, passive intermodulation has become an urgent problem in wireless communication technology. In the actual system, because the factors that produce passive intermodulation effects are very complex, it is very important to locate the position that produces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00
CPCH04B17/00
Inventor 张美郑川陈翔崔万照皇甫江涛冉立新
Owner ZHEJIANG UNIV
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