Universal electromagnetic signal automatic searching method

An automatic search and electromagnetic signal technology, applied in electrical components, transmission monitoring, transmission systems, etc.

Active Publication Date: 2012-11-14
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings, the present invention provides a general automatic search method for electromagnetic signals, which can automatically complete the efficient search and interception of el

Method used

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  • Universal electromagnetic signal automatic searching method
  • Universal electromagnetic signal automatic searching method

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Embodiment Construction

[0022] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0023] A1. Frequency domain scanning and threshold detection: Use FFT fast stepping method to obtain the power spectrum information of the specified frequency band, and then use the threshold detection technology to extract the signal exceeding the threshold from the power spectrum information, and for the signal higher than the threshold, according to the setting The bandwidth parameters of the signals to be searched are filtered, and finally a list of signals to be searched is formed;

[0024] Such as figure 2 As shown, this step includes the following processing steps:

[0025] A101. According to the set search frequency band, use the FFT st...

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Abstract

The invention relates to a universal electromagnetic signal automatic searching method. The method mainly comprises the following steps of: (1) performing frequency-domain scanning and threshold value detection to form a list of signals to be searched; (2) performing frequency-domain feature extraction on the signals in the list of the signals to be searched, and matching the extracted frequency-domain features with the set frequency-domain features of the signals to be searched; (3) identifying modulation parameters of the signals of which the frequency-domain features are matched with the set frequency-domain features of the signals to be searched, and matching the modulation parameters with the set modulation parameters of the signals to be searched; and (4) performing demodulation processing and time-domain feature parameter extraction on the signals of which the modulation parameters are matched with the set modulation parameters of the signals to be searched, and then matching the time-domain features with the set time-domain features of the signals to be searched; and if the similarity is greater than a set similarity coefficient, then determining that the current processed signal is a target signal to be searched. According to the method provided by the invention, electromagnetic signals with certain specific features can be searched automatically without human intervention; the intercept probability of the signals can be improved remarkably; and the work efficiency of detection personnel can be improved greatly.

Description

technical field [0001] The invention relates to the fields of frequency spectrum monitoring, signal reconnaissance, and electromagnetic information safety detection, and more specifically relates to an automatic search method for electromagnetic signals. Background technique [0002] In the fields of spectrum monitoring, signal reconnaissance, electromagnetic information security detection, etc., it is often necessary to find electromagnetic signals with certain characteristics in complex electromagnetic environments, such as illegal satellite broadcasting and television signals, reactionary radio signals, wireless eavesdropping and stealing signals, and information equipment Electromagnetic leakage signal, etc. However, in the actual process of spectrum monitoring or signal reconnaissance, thousands of electromagnetic signals are usually received at the same time. Searching for electromagnetic signals with certain specific characteristics among so many signals is very impor...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B17/382
Inventor 向长波许建华
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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