西安电子科技大学学报（自然科学版）2024，Vol.51Issue(4)：67-77,11.DOI:10.19665/j.issn1001-2400.20240307
一种提升均匀自由度的稀疏阵列设计
Sparse array design for improving uniform degrees of freedom
摘要
Abstract
An improved sparse array design is proposed to address the limitations of the underdetermined direction of arrival estimation performance caused by holes and low uniform degrees of freedom in the difference co-array of the coprime array with compressed inter-element spacing.First,by analyzing the influence of the array structure on the redundancy and hole position of the difference co-array,it is concluded that adjusting the subarray position of the coprime array with compressed inter-element spacing can effectively reduce the redundancy of the difference co-array,increase the consecutive lags,and improve the uniform degree of freedom.Second,the physical array element positions are adjusted and the closed-form expression for designing sparse array physical array element positions is provided.Then,based on the array element positions,the closed-form expressions for the proposed sparse array degrees of freedom,uniform degrees of freedom,and the difference co-array hole positions are derived.Theoretical analysis shows that,compared to the coprime array with compressed inter-element spacing and the improved sparse array,the proposed array possesses higher degrees of freedom and uniform degrees of freedom with the same number of elements.Finally,simulation experiments on the direction of arrival estimation are conducted in various scenarios using the multiple signal classification algorithm based on spatial smoothing.The results show that the proposed sparse array has a better direction of arrival estimation performance under various experimental conditions,thus verifying the effectiveness of the design.关键词
互质阵列/均匀自由度/波达方向/多重信号分类Key words
coprime array/uniform degrees of freedom/direction of arrival/multiple signal classification分类
信息技术与安全科学引用本文复制引用
戚连刚,张义权,国强,王亚妮,KALIUZHNYI Mykola..一种提升均匀自由度的稀疏阵列设计[J].西安电子科技大学学报（自然科学版）,2024,51(4):67-77,11.基金项目
国家自然科学基金(62071140,62101155) （62071140,62101155）
国家重点研发计划(2018YFE0206500) （2018YFE0206500）
