Clock Signal Recovery Algorithm for FPGA-based Microcontroller Near-Field EMI Measurement and Processing

Embedded systems exhibit variability in emitted EMI when executing different instructions. To further analyze EMI signals and identify their correlations with the internal behavior of a specific DUT (an FPGA-based microcontroller), an improved algorithm for processing clock signals is proposed to recover distorted clock waveforms. This approach allows for more accurate and stable FPGA-based microcontroller EMI signal segmentation and analysis. This technique can provide technical support for electromagnetic information leakage security analysis in embedded systems.