Modified joint domain localized reduced-rank STAP

Among Reduced-Rank STAP methods, Joint Domain Localized(JDL) method is a relatively effective beam-Doppler domain method. However, there are two restricts placed on this method which circumscribe its performance. One is that the transformation is equivalent to the 2-D DFT, the other is that the target steeling vector must be one column of the transformation. This paper point out that those two restricts are not necessarily optimal cases, and present a modified JDL method via changing the relative locations of each angles and Dopplers in the transformation matrix. Simulation results demonstrate that those new structures are more data efficient as well as more computationally efficient, with only 4 channels can achieve similar performance as 9 channels in original JDL method. Moreover, it is more tolerant to the non-ideal real environment.