Knowledge-Aided STAP Using Low Rank and Geometry Properties

Algorithm 1

The proposed KA-STAP algorithm.

Initialization:

, , , .

Select a group of space-time steering vectors

(for side-looking ULA)

 ,

 where  ,

 , and  ,

Compute calibrated space-time steering vectors

 Estimate using the methods in [19],

 where columns of are all equivalent to ,

 ,

  (In RD version, ),

Compute

 ,

 ,

 ,

 .

 (In RD version, instead of ),

For each snapshot  

 ,

Compute

 ,

 ,

 Estimate ,

 ,

  (In RD version, instead of , instead of )

Compute

 Adopt the Lanczos algorithm to to compute ,

  (In RD version, instead of ),

Filter weights computation

 ,

Or:

 .

  (In RD version, instead of )