Simulation Signal Analysis: FFT Spectrum, Power Spectrum, and EMD De-composition with Hilbert-Huang Transform

This program plots the FFT spectrum and power spectrum of a simulated signal. It utilizes Empirical Mode Decomposition (EMD) to decompose the signal, visualizes the resulting intrinsic mode functions (IMFs), and computes instantaneous envelopes and frequencies. Additionally, it generates the Hilbert-Huang spectrum and Hilbert marginal spectrum for comprehensive time-frequency analysis.