2-D ADBF at Subarray Level with Pattern Control Based on Subspace Projection

ADBF at subarray level has important applications in phased array radar systems. We present the signal model of 2-D ADBF at subarray level, suitable for any plane phased array. We give 2-D ADBF at subarray level which can be generalized by ADBF at element level, but its limitation is that adaptive processing makes the sidelobe level of patterns increase remarkably. Therefore, we introduce 2-D ADBF at subarray level based on subspace projection. This method can obtain adaptive pattern the same as quiescent pattern in the absence of jammer, while improve sidelobe level of adaptive patterns markedly in presence of jammer. Simulation results indicate the validity of the introduced method