Application Of Improved VMD-Md Algorithm In Radar Chirp Signal

Radar originated in the period of World War I.Its original purpose was to detect metal objects in the air.With the development of the times,scientific advances in various fields such as microelectronics,and the continuous development of radar technology,radar systems have become the center of information control on the battlefield in the future..There are two issues that need to be addressed in radar signal processing: radar interference and radar clutter.The signal processed in this paper is the Chirp signal in the radar jamming signal.In order to achieve the denoising and useful information extraction of pipeline leakage signals,we use the VMD-Md algorithm and CEEMDAN-Md algorithm to process the chirp signal.First,the VMD(variable modal decomposition)/CEEMDAN algorithm is applied to the collected signals to obtain a series of IMFs(components obtained by decomposing the original signal).Next,the extracted IMF is subjected to MD calculation,and the obtained MD value is compared and the appropriate IMF is screened.Finally,all the IMF satisfying the condition are added up and the reconstructed waveform is useful information after denoising the original signal.In this paper,the signal of experimental simulation is first processed,and the useful information in the experimental signal can be accurately extracted and the error energy is small.Then,the chirp signal can be processed and the useful information can be accurately extracted,which proves that this method is feasible.