Time-frequency domain interference suppression method and device combined with morphological processing

The time-frequency domain interference suppression method using joint morphological processing effectively addresses the challenges of high computational complexity and signal loss in radar systems by employing short-time Fourier transform and dilation operations to enhance interference suppression and target detection.

CN119126027AActive Publication Date: 2024-12-13XIDIAN UNIV
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Patent Information

Application Number
CN202411189971.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-28
Publication Date
2024-12-13
Estimated Expiration
2044-08-28

AI Technical Summary

Technical Problem

Existing radar interference suppression methods face high computational complexity and struggle to achieve both high interference suppression ratio and low signal loss, especially in complex and changeable jamming environments.

Method used

A time-frequency domain interference suppression method using joint morphological processing, involving short-time Fourier transform, probability density distribution analysis, and mathematical dilation operations to create a target interference mask for effective interference suppression.

Benefits of technology

The method achieves high interference suppression ratio with low signal loss by accurately identifying and suppressing interference edges, improving radar's ability to detect real targets.

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Abstract

The invention relates to a time-frequency domain interference suppression method and device combined with morphological processing, and the method comprises the steps: carrying out the short-time Fourier transform of a received echo signal at a target, and obtaining a time-frequency graph; obtaining an initial interference mask according to the time-frequency diagram; processing the initial interference mask through expansion operation to obtain a target interference mask; and processing the time-frequency diagram through the target interference mask to obtain a time-frequency diagram after interference suppression. According to the invention, short-time Fourier transform is carried out on the echo signal to obtain the time-frequency diagram, and the interference mask is obtained by combining the time-frequency diagram, so that the interference edge lower than the target echo energy in the time-frequency diagram is effectively suppressed, and the high interference suppression ratio is realized, so that the radar can identify and detect a real target, and the target detection efficiency is improved. The suppression capability of the interference edge is improved through expansion operation, the interference suppression capability is improved, and both the high interference suppression ratio and the low signal loss are achieved.
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Citation Information

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