全息穿透雷达非平整表面杂波抑制算法研究

doi:10.12305/j.issn.1001-506X.2022.09.10

Abstract

Abstract:

For the problem of uneven surface clutter when using holographic subsurface radar for non-destructive detection, a double-frequency cancellation based method is proposed to mitigate the uneven surface clutter. This method first obtains the low-frequency and high-frequency radar signals under setting conditions. Then, the corresponding signal model is constructed. By analysing the characteristics of target signals and non-flat surface signals in radar echoes of different frequencies, the parameters in the model are estimated by combining the theoretical derivation and fitting an approximation of the surface echoes. Finally, the estimated surface echo is cancelled with the original low-frequency echo to mitigate the uneven surface clutter. The effectiveness of the proposed method is verified by simulation and real experiments.

Key words: holographic subsurface radar, clutter mitigation, uneven surface, double-frequency cancellation, non-destructive detection

CLC Number:

TN958

Cheng CHEN, Tao LIU, Laibao CAO, Zhihua HE, Chunlin HUANG, Yi SU. Uneven surface clutter mitigation for holographic subsurface radar[J]. Systems Engineering and Electronics, 2022, 44(9): 2776-2782.

Figures/Tables 7

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References 31

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处理方法	仿真实验	实测实验
处理前	-3.28	3.87
DFC	9.03	8.85
对消后增强	19.74	24.68
SDF	-3.49	4.42
SDMC	0.63	7.07

Uneven surface clutter mitigation for holographic subsurface radar

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