Deterministic Nulling for Antenna Pattern of Digital Beamforming Radar Systems

Deterministic nulling arises in digital beamforming radar applications where the locations of interferers and clutter regions are either known apriori or can be determined by other means. We address this problem of deterministic nulling by specifying the resulting antenna patterns with multiple nulls that include those extending continuously across intervals of prescribed widths. The solution involves determining the basis vectors for the null spaces of such extended regions, or their composite, via the singular value decomposition of the pertinent portions of the antenna response matrix. An efficient practical implementation of this procedure is then provided.