Firstly,the range parameter of scattering centers is obtained by matrix-pencil method,and the type parameter of scattering centers is estimated based on approximation of GTD scattering model,and then the amplitude parameter of scattering centers can be estimated by least-squares method.

Method of scattering center extraction based on GTD model;

In order to demonstrate the effectiveness of GTD model, usually used to model the target scattering behaviors in optical frequency band, for target resonance band, a new method for the GTD model parameters extraction based on matching pursuits is proposed in this paper.

Approximating GTD model by the damped exponentials(DE) model,the Cramér-Rao bounds(CRB) is derived and simplified on type parameter estimates and the requirements for correctly identifying type parameter are obtained.

Novel method for scattering center extraction based on coherent polarization GTD model;

A bistatic scattering model is presented based on perturbation theory and empirical formula in this paper, and the relations between the bistatic scattering strength and the frequency, the wind speed, the sound speed, the angles(the grazing angle, the scattering angle and the bistatic angle) are analyzed by means of computer simulatio.

The model is applied to shallow water with a reverse thermocline and the curves of reverberation loss calculated by the model are compared when applying four different bottom scattering models.

In order to study bistatic ocean reverberation,three bistatic scattering models are developed.

Review the ultrasonic scattering model for inhomogeneous soft tissue;