Based on the Basis Expansion Model (BEM),linearized conversion over the time-variant Doppler fading channels was achieved via the time-frequency duality and the circulant matrix diagonalized processing.

Wavelet Package Based Speech Enhancement Algorithm Using Time-Frequency Threshold;

Application of joint time-frequency distribution and its attribution.;

Applying "zoom lens having adjustable focus" of wavelet transform to provide multiple levels time-frequency analysis for load power signal of shearer,analysis results show that th.

Preliminary analysis of time-frequency distribution of transient evoked otoacoustic emission in normal hearing human subjects;

Thus, the standard time-frequency distribution images of all fault conditions including the gap abrasion in-formation of the main bearing can be defined.

Diagnosis method of instantaneous frequency for rotor impact-rub fault of aeroengine;

Ultrasonic signal process method based on instantaneous frequency;

Study of analysis of instantaneous frequency in partial wave method;