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Radar interference identification and suppression method based on cyclostationarity

A cyclic stability and radar interference technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of complex electromagnetic environment, difficult identification, and poor suppression effect of vehicle-mounted millimeter-wave radar, and achieve poor suppression effect and interference suppression effect. Obvious, the effect of solving the difficulty of interference identification

Active Publication Date: 2020-11-20
北京理工大学重庆创新中心
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Problems solved by technology

[0003] The radar interference identification and suppression method based on cyclostationary provided by the present invention mainly solves the problem of difficult identification and poor suppression effect of the vehicle-mounted millimeter-wave radar due to the complex electromagnetic environment

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  • Radar interference identification and suppression method based on cyclostationarity
  • Radar interference identification and suppression method based on cyclostationarity
  • Radar interference identification and suppression method based on cyclostationarity

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Embodiment 1

[0039] In order to solve the interference problem in the vehicle-mounted millimeter-wave radar, this embodiment proposes a radar interference identification and suppression method based on cyclostationarity.

[0040] See figure 1 , the method mainly includes the following steps:

[0041] S11. Establish an echo signal model.

[0042] In this embodiment, the vehicle-mounted millimeter-wave radar is used as a platform, and a linear frequency modulation continuous wave signal (chirp signal) is used as the radar transmission signal; the target echo signal is calculated; the target echo signal and the transmission signal are mixed in the radio frequency section to obtain the first mixed frequency signal; filtering and amplifying the first mixed frequency signal to obtain an echo signal model.

[0043] S12. Establish an interference signal model.

[0044] The interference type is selected to determine the interference signal; the interference signal is mixed with the transmitted s...

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Abstract

The invention provides a radar interference identification and suppression method based on cyclostationarity. The method comprises the steps of establishing an echo signal model and an interference signal model; based on the echo signal model and the interference signal model, superposing the echo signal model and the interference signal model with a stationary noise signal to obtain a first reference signal, calculating the cycle frequency of the first reference signal, and recording the cycle frequency as a first cycle frequency; based on the echo signal model and the stationary noise signal, calculating to obtain a second cycle frequency; comparing the number of the second cyclic frequencies with the number of the first cyclic frequencies, and identifying whether interference exists ornot according to a comparison result; acquiring an echo signal to be measured; if it is judged that interference exists currently, inputting the echo signal to be detected into a frequency shift filter to achieve interference suppression; obtaining the cyclic frequency on the basis of a cyclic stability theory to realize accurate interference identification, and carrying out interference suppression by using a designed frequency shift filter. The interference suppression effect is obvious, and the problems of difficulty in interference identification and poor suppression effect in a vehicle-mounted millimeter wave radar are solved.

Description

technical field [0001] The invention relates to the technical field of radar anti-jamming, in particular to a method for identifying and suppressing radar jamming based on cyclostationary. Background technique [0002] The research content of this embodiment is the interference problem in the vehicle-mounted millimeter-wave radar. Clutter interference in complex road conditions and workshop interference in dense electromagnetic environments lead to low radar recognition accuracy, which is the main problem faced by vehicle-mounted millimeter-wave radars. The current anti-jamming technology mainly realizes jamming detection or jamming suppression from the aspects of waveform design, phase control radar technology and signal processing technology. The radar anti-jamming technology at the present stage is mainly processed in the time domain, frequency domain, air domain, polarization domain, etc. However, due to the large number and types of interference in the vehicle-mounted ...

Claims

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Application Information

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IPC IPC(8): G01S7/28G01S7/292G01S7/35
CPCG01S7/2813G01S7/292G01S7/354
Inventor 李阳李枫韩雪
Owner 北京理工大学重庆创新中心
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