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A Passive Intermodulation Positioning Method Based on FM Continuous Wave

A frequency-modulated continuous wave and passive intermodulation technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems of complex processing process and large positioning error, and achieve simple calculation, saving design cost, and simplifying the overall design. Effect

Active Publication Date: 2020-12-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the processing process of the existing intermodulation positioning technology is complicated and the positioning error is large, and a passive intermodulation positioning method based on frequency modulation continuous wave is proposed

Method used

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  • A Passive Intermodulation Positioning Method Based on FM Continuous Wave
  • A Passive Intermodulation Positioning Method Based on FM Continuous Wave
  • A Passive Intermodulation Positioning Method Based on FM Continuous Wave

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Embodiment Construction

[0051] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the implementations shown and described in the drawings are only exemplary, intended to explain the principle and spirit of the present invention, rather than limit the scope of the present invention.

[0052] The embodiment of the present invention provides a passive intermodulation positioning method based on FM continuous wave, such as figure 1 and figure 2 Commonly shown, including the following steps A1-A6:

[0053] A1. Generate two linear FM signals S1, S3 and one single frequency signal S2 through DDS (Direct Digital Synthesizer), and perform D / A conversion and power on the three signals S1, S2 and S3 respectively enlarge.

[0054] Among them, the frequency expression of the chirp signal S1 is:

[0055] f S1 =-kt+f 0

[0056] The frequency expression of the single-frequency signal S2 is:

[0057] f S2 = f...

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Abstract

The invention discloses a passive intermodulation positioning method based on frequency modulation continuous wave. The signal source adopts two channels, one up and one down linear frequency sweep source and one channel of fixed frequency signal source, and forms two different transmission links through three channels of signals. Using the difference in the time transmission delay of the two links input by the mixer to obtain an offset signal, the value of the offset signal is linearly related to the time delay of the two links, and then through the propagation characteristics of the electromagnetic wave, and then obtained this Compared with the existing intermodulation positioning technology for the relationship between the offset signal and the intermodulation fault distance, the data processing process of the present invention is simpler and has stronger feasibility.

Description

technical field [0001] The invention belongs to the technical field of passive intermodulation interference testing, and in particular relates to the design of a passive intermodulation positioning method based on frequency modulation continuous waves. Background technique [0002] In communication systems, passive intermodulation (Passive Inter-Modulation, PIM) interference refers to the phenomenon that two or more transmitting carriers pass through passive devices and produce linear combination products that fall into the receiving passband to form interference, especially In the context of the prevalence of high-power multi-channel communication systems today, the PIM interference caused by the nonlinearity of various passive devices in the radio frequency system has an increasingly serious impact on the performance of reception. [0003] Therefore, the research on PIM testing and positioning technology is of great significance. In order to deeply analyze the PIM intermod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/345
Inventor 金海焱文雪平金海陆廖丹张明
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA