Application of HTT to Intra-pulse Characteristics Analysis for Radar Signals

Hilbert-Huang Transform(HHT) is a new non-stationary signal processing technology.This method contains two parts:empirical mode decomposition(EMD) and the Hilbert spectral analysis.The essence of the method is to carry out stationary process to the non-stationary signal,and decompose the different scale undulation or trend in signals,ultimately the instantaneous frequency and energy represent the frequency components of the original signal.This paper analyzes the actual radar intra-pulse signals by HHT time-frequency analysis method,the result shows that the HHT method is a time-frequency analysis method with great efficiency,it can describe and extract the time-frequency characteristics of the signal.