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| Application of time-frequency peak filtering with minimum mean cross-entropy in ground penetrating radar signal denoising |
ZHENG Wei1( ), TIAN Ren-Fei1(), GAO Yu-Han1, WU Bin2 |
1. College of Geophysics, Chengdu University of Technology, Chengdu 610059, China
2. Sichuan Geophysical Survey and Research Institute, Chengdu 610072, China |
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Abstract In practical detection operations using ground-penetrating radar (GPR), factors such as environmental noise and instrument errors frequently cause signals to be mixed with substantial noise, seriously reducing signal quality and the reliability of analytical results. To address this issue, this study proposed a time-frequency peak filtering method combined with minimum mean cross-entropy (TFPF-MMCE) for denoising GPR signals. This method combined time-frequency peak filtering with the cross-entropy function, enabling effective noise suppression and precise preservation of valid signals through precise optimization of the time-frequency representation, thereby significantly improving the quality of GPR signals. Numerical simulation and field GPR experiments validated that the TFPF-MMCE method exhibited a high noise removal capability and, thus, can effectively eliminate random noise while significantly improving signal clarity and reliability. Compared to traditional denoising methods, TFPF-MMCE shows significant advantages in denoising effectiveness and noise resistance stability, suggesting promising application potential and practical value in the field of GPR signal processing.
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Received: 18 July 2024
Published: 22 April 2025
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TFPF-MMCE algorithm flow chart
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Ground-penetrating radar geological model and corresponding forward modeling records
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The 46th ground-penetrating radar signal with added noise
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Comparison of denoising results between TFPF-PWV and TFPF-MMEC
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RMSE values and PSNR values under different signal-to-noise ratios
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| 去噪方法 | RMSE/10-4 | PSNR | | TFPF-PWV | 5.37 | 65.38 | | TFPF-MMCE | 3.24 | 69.78 | | 双边滤波 | 3.74 | 68.55 | | FIR滤波 | 7.51 | 62.48 | | 均值滤波 | 3.83 | 68.34 | | 小波变换 | 3.32 | 69.56 |
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Comparison of denoising effects among many methods
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Time-frequency peak filtering effect of ground-penetrating radar
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Time-frequency peak filtering effect after eliminating the direct wave
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