Suppressing Grating Lobes in Wideband Subarray Adaptive Beamforming

When beamforming large aperture, subarray partition is a common method to reduce the computational complexity and the requirement of snapshot. However, the increase of the element spacing between subarrays will lead to the grating lobe effect and reduce the performance of beamforming. In this study, the method of adding zero constraints are combined with wideband subarray adaptive beamforming to suppressing the grating lobes and improving the performance of beamforming. The effectiveness of the algorithm is verified by computer simulation.