Every modules used in the simulation system are described, the multipath parameter estimation algorithms and techniques based on array signal processing are studied in detail as well.

Based on the Doppler Distributed Clutter(DDC) model,this paper studies the distribution of eigenvalues of the clutter covariance matrix and proposes a robust algorithm of Doppler parameters estimation for airborne radar.

Differing from the traditional estimation method,a method for Doppler parameters estimation based on fractional Fourier transform is presented in this paper.

Doppler parameters estimation is the critical technique in SAR imaging processing.

According to the model, a new method of Doppler parameter estimation for SAR was proposed.

Based on the relationship between the Fractional Fourier Transform and the time frequency distribution,using the property that the echo of a moving target is a chirp signal naturally, SAR moving target detection and Doppler parameter estimation have been done in the fractional Fourier domain.

The Doppler parameter estimation methods based on multi-look processing are studied and it is verified that the methods can satisfy the characteristic and applied demand of the SAS motion compensation.