Wideband Irregular Subarrayed Array Structure Optimization Based on Adaptive Differential Search for Improved Interference Suppression

Array structure design significantly impacts signal processing performance in phased radar systems. This paper proposes a module partition method to enhance interference suppression in wideband irregular subarrayed arrays. To reduce system complexity and costs, we first introduce a wideband adaptive beamforming architecture that combines module-level time delay and stretch processing for hierarchical subarray structure. Based on this architecture, we establish an optimization model for array module partitioning that maximizes interference suppression capabilities. We propose an adaptive differential search algorithm to efficiently solve this optimization problem and obtain module partition schemes with better performance. Extensive numerical experiments and comparisons with existing methods demonstrate the effectiveness of our proposed approach.