A new reduced-rank STAP method based on cross spectral defined by range cell echo

In the cross spectral method (CSM), the cross spectral is defined by space-time steering vector. One character of the method is that the cross spectral should be calculated and arranged in every angle-Doppler cell, so it has a great burden of calculation. A new reduced-rand (RR) STAP method is developed in this paper, the cross spectral is defined by the echo data of a range cell, instead of the steering vector. In the new method the cross spectral is calculated and arranged only one time for each range cell, so it greatly decreases the burden of calculation. It is proved in theory that the new method has a good clutter suppression performance as well. The result of simulation shows the good efficiency of the method.