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IPIX radar echo data time-frequency analysis method and system

A radar echo and time-frequency analysis technology, applied in the research field of radar target recognition, can solve the problems such as IPIX radar that no one has proposed, and achieve good results

Active Publication Date: 2020-05-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0003] In my country, no one has proposed to use a high-concentration time-frequency analysis algorithm to study IPIX radar echo data under the background of sea clutter, and no one has proposed to use SET-STFrFT to study IPIX radar echo data.

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  • IPIX radar echo data time-frequency analysis method and system
  • IPIX radar echo data time-frequency analysis method and system
  • IPIX radar echo data time-frequency analysis method and system

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Embodiment Construction

[0069] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0070] Embodiments of the present invention provide a time-frequency analysis method and system for IPIX radar echo data.

[0071] Please refer to figure 1 , figure 1 It is a flow chart of a method for time-frequency analysis of IPIX radar echo data in an embodiment of the present invention, specifically comprising the steps of:

[0072] S101: Obtain the IPIX radar echo signal x(t), and calculate the optimal rotation order of the signal x(t);

[0073] S102: Process the signal x(t) by the STFrFT method, calculate the short-time fractional Fourier transform of the signal x(t) under the optimal rotation order, and obtain the short-time fractional Fourier transform of the signal x(t) time-frequency distribution;

[0074...

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Abstract

The invention provides an IPIX radar echo data time-frequency analysis method and system. The method comprises the following steps of: firstly, calculating an optimal rotation order of a signal; processing the signal through an STFrFT method, and calculating the short-time fractional Fourier transform of the signal under the optimal rotation order; calculating the instantaneous frequency of the STFrFT time-frequency spectrum; and then constructing a synchronous extraction operator SEO based on the processing result of the STFrFT by using SET technology, and synchronously extracting the STFrFTtime-frequency spectrum to obtain time-frequency distribution with high aggregation degree. The method has the beneficial effects that: the signal instantaneous frequency is estimated more accurately,time-frequency distribution with a high aggregation degree is obtained, a frequency curve generated by target movement is obtained more precisely, and a moving target and sea clutter are differentiated and distinguished; the method is novel in algorithm and good in effect, meets the requirements of scientific analysis and research, and has positive significance for radar target recognition research and non-stationary signal research.

Description

technical field [0001] The invention relates to the research field of radar target recognition and various non-stationary signals, in particular to a method and system for time-frequency analysis of IPIX radar echo data. Background technique [0002] Radar target recognition technology is a complex system engineering integrating target, environment and signal processing technology. It plays a very important role in improving the army's command automation level, offensive and defensive capabilities, homeland air defense and anti-missile capabilities, and strategic early warning capabilities. Radar target recognition technology, as one of the important development directions of modern radar technology, will become an important technical component in future weapon systems. It has broad application prospects and great military application value. Military powers such as the United States and Russia regard it as The focus of developing future intelligent weapon systems and the key...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 锅娟郝国成白雨晓谭淞元
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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