| 摘要: |
| 为了提高稀疏阵列的波达方向（Direction of Arrival，DOA）估计性能，提出了一种基于阵列移动的新型稀疏阵列设计方法。通过挖掘阵列移动在DOA估计中的潜在价值，利用阵列移动增加的虚拟阵元可填充原始虚拟阵列部分孔洞的特点对稀疏阵列结构进行优化设计。基于该方法，现有原始阵列可被重新构造形成具有更大阵元间距的新型稀疏阵列。这种新型阵列具有比原始阵列更大的物理孔径和更低的互耦量，同时可产生具有更多连续虚拟阵元的虚拟阵列。理论分析表明，它们具有的连续自由度（Degrees of Freedom，DOF）数目是原始阵列连续自由度数目的3倍。基于这些优良特性，利用所提方法设计的新型阵列具有比原始阵列更优的DOA估计性能。仿真实验结果证实了所提方法的优势和有效性。 |
| 关键词: 稀疏阵列设计 DOA估计 阵列移动 虚拟阵列 |
| DOI：10.20079/j.issn.1001-893x.241008002 |
|
| 基金项目:国防科技173计划技术领域基金项目（2022-JCJQ-ZD-010-20） |
|
| A Novel Sparse Array Design Strategy Based on Array Motion |
| PENG Zhanli,ZENG Fuhong,CHEN Yitao,LI Peixiu,TAO Xiaowei |
| (Nanjing Corad Electronic Equipment Co.，Ltd.，Nanjing 211100，China) |
| Abstract: |
| To enhance the direction of arrival(DOA) estimation performance，a novel sparse array design strategy based on array motion is proposed.By exploiting the potential value of array motion in DOA estimation，the sparse array structure is optimally designed by utilizing the feature that the virtual array elements increased by array motion can fill some of the holes of the original virtual one.Based on this method，the existing original arrays can be reconstructed to form novel sparse ones with larger inter-element spacing.These new arrays have larger physical apertures and lower mutual coupling than the original ones，and can also produce virtual arrays with more consecutive virtual elements.Theoretical analysis shows that they have three times the number of consecutive degrees of freedom(DOF) than that of the original arrays.Based on these good properties，they are able to achieve better DOA estimation performance than the original ones.Simulation results are provided to demonstrate the superiority and effectiveness of the proposed method. |
| Key words: sparse array design DOA estimation array motion virtual array |
《电讯技术》编辑部 