Adaptive multiple‐input multiple‐output radar beamforming based on direct data domain approach

An adaptive multiple‐input multiple‐output (MIMO) radar beamforming technique based on direct data domain ( D 3 ) approach is presented. The proposed method generally outperforms traditional adaptive beamformers in surprise or rapidly changing interference scenarios due to the use of a D 3 interference cancellation technique, which utilises a single snapshot for adaptive beamforming. The proposed D 3 approach suffers from performance degradation in the presence of uncertainty in the knowledge of target direction. To overcome this problem, a robust D 3 approach using worst‐case performance optimisation is developed to achieve robustness against look direction error.