Aiming at the challenge of effective signal loss in traditional methods of separated diffracted and re-flected waves,a method using two-dimensional variational mode decomposition(2D-VMD)to separate diffracted and reflected waves of ground penetrating radar(GPR)data is proposed.After decomposing two-dimensional GPR data using 2D-VMD,intrinsic mode function(IMF)components and the F-K spectrum of each IMF can be ob-tained,which range from low-frequency and low-wave number to high-frequency and high-wave number.By analy-zing the differences between the diffracted wave and the reflected wave in the frequency-wavenumber domain,the IMF components corresponding to diffracted and reflected waves are reconstructed separately,and the separated dif-fracted and reflected wave data are obtained.The processing results of numerical simulation and measured data show that,compared with traditional methods,this method can effectively separate diffracted waves and reflected waves without losing any effective signals.
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