Detection of LFM signals based on wavelet ridge extracting and Hough transform;

Multi wavelet ridge extraction based on reassigning algorithmand singular value decomposition

In order to solve the effect of the SNR and the problem of parameter estimation,this article is based on the wavelet ridge of asymptotical signal,and the relation between instantaneous frequency and wavelet ridge,the authors make use of this theory to solve the instantaneous frequency measurements of noncooperated signal.

Simulation of PSK Carrier-Frequency Extraction Based on Improved Wavelet-ridge Method;

The in-pulse frequency-coded signal is denoised based on wavelet analysis firstly,and then the wavelet-ridge is used to extract the in-pulse characteristics.

In the progress of automatic identify,the improvement wavelet basis is used to MRA,then feature extraction.