Time modulated beamformer for sidelobe blanking

Time-modulation is applied to an array pattern by alternating a beamformer between two sets of beamforming coefficients. These are selected so signals arriving in the sidelobes are BPSK modulated by the beam-switching while signals in the main lobe are not. This technique enables sidelobe blanking using a single beamformer, which is simpler than other approaches.