High-resolution beamforming technology based on entropy dividing sub-array

The use of sub-array processing method for large arrays can achieve better processing performance at a small cost. This paper proposes a high-resolution beamforming technique based on entropy dividing sub-arrays for uniform linear arrays. By establishing the entropy model, the effects of sub-array division technology and sub-array unit directivity on the output performance of the array are comprehensively considered.The performance of sub-array division technology on interference and clutter suppression is simulated and analyzed, and the mathematical solution method of optimal sub-array division is explored. The method is extended to the design of composite multi-band arrays to optimize the parasitic grating lobes caused by missing cells, providing theoretical support and engineering implementable algorithms for the development of large-scale array radars. Finally, the validity and feasibility of the proposed model are verified by experimental data.