Abstract:

The two-dimensional blocking matrix is established according to the two-dimensional array geometry (including the circular array,planar array,the Y matrix,cross array and L array).Blocking matrix is always employed in interference suppression or blocking desired signal in GSC array.Cascaded column of differencing (CCD) method is a simple and effective method with lower computational complexity,which has been widely used in array signal processing.However,the current study focuses mainly on one-dimensional linear array,while two-dimensional (circular array and plane array) and other formation (Y matrix,cross array and L-array) are rarely proposed,nor comprehensive.This paper studies the representative two-dimensional array geometry in detail and presents a simple method for designing a blocking matrix,namely one-column ladder accumulation.Simulation verifies the feasibility of this method.

Key words: cascaded column of differencing (CCD) method;two-dimensional array geometry;interference suppression;blocking matrix