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Radiation source identification method

An identification method and radiation source technology, which are applied in the field of radiation source identification and can solve the problems of difficult, accurate, stable and reliable identification of radiation sources.

Inactive Publication Date: 2012-05-02
HARBIN ENG UNIV
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Problems solved by technology

General radiation source identification methods are difficult to achieve accurate, stable and reliable radiation source identification in complex electromagnetic environments

Method used

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Embodiment Construction

[0038] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0039] combine Figure 1~2 , the purpose of the present invention is achieved in this way: for the radiation source signal received by the sensor, first use Fourier transform to transform the signal from the time domain to the frequency domain, and normalize the energy of the signal in the frequency domain. Then, the wavelet decomposition algorithm is used to decompose the signal into several frequency scales, extract the exponential entropy feature of the signal at each scale, and construct an exponential entropy feature vector for radiation source identification. Finally, the entropy feature database of radiation sources is integrated, and the final recognition result is obtained by using the gray relational algorithm.

[0040] In the present invention, if the signal is decomposed by L-level wavelets, a total of 2L frequency subspaces can be obtained from low f...

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Abstract

The invention aims to provide a radiation source identification method. The radiation source identification method comprises the following steps of: converting a radiation source signal acquired by a sensor from a time domain to a frequency domain; normalizing the signal energy in the frequency domain; performing an L-layer frequency domain wavelet decomposition on the preprocessed signal to acquire 2L frequency subspaces; calculating etropy index of the signal on different frequency subspaces; constructing the characteristic vector for the radiation source identification; according to the characteristic vector for the radiation source identification and a radiation source characteristic database, acquiring the final identification result by using a gray correlation algorithm. The radiation source identification method is effective, accurate, stable and reliable in a complex electromagnetic environment and under the condition of large dynamic signal to noise ratio change. By the radiation source identification method, the requirement of the radiation source identification can be met in the complex electromagnetic environment and in the large signal to noise ratio dynamic range.

Description

technical field [0001] The invention relates to an identification method in the field of radiation source identification. Background technique [0002] In the civilian field, radiation source identification is one of the key technologies in the fields of cognitive radio, radio positioning, communication equipment fault detection and identification, and plays a very important role. [0003] With the development of science and technology, the electromagnetic signal environment in which the signal is located is becoming more and more complex, the density of radiation sources has doubled, and the electromagnetic signal patterns are complex and changeable, all of which have brought unprecedented challenges to the identification of radiation sources. General radiation source identification methods are difficult to achieve accurate, stable and reliable radiation source identification in complex electromagnetic environments. Therefore, it is urgent to research and develop new radia...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
Inventor 林云李靖超李一兵葛娟康健叶方田雪宜
Owner HARBIN ENG UNIV
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