Extraction of jet engine modulation component weakly present in measured signals for enhanced radar target recognition

Abstract

This study presents a method for extracting the jet engine modulation (JEM) component weakly present in the radar received signal. First, the analytic form of the complicated measured signal is decomposed into intrinsic mode functions (IMFs) via complex empirical mode decomposition (CEMD). Then, the extracted IMFs are combined to reconstruct the JEM component based on the signal eccentricity, which serves as assessing the JEM micro-Doppler contribution to the signal. Applying these techniques to the measured raw signals demonstrate that the proposed extraction method significantly improves the clarity of the JEM analysis and is expected to be useful for enhanced radar target recognition.

Keywords:

• complex empirical mode decomposition (CEMD)
• jet engine modulation (JEM)
• micro-Doppler
• radar target recognition
• signal eccentricity

Acknowledgement

This research was supported by the Agency for Defense Development.