阮怀林,
吴晨曦,
钟华,
吴世龙
国防科技大学电子对抗学院 合肥 230037
基金项目:国家自然科学基金(61171170)，安徽省自然科学基金(1908085QF280)
详细信息
作者简介:孙兵：男，1991年生，博士生，研究方向为空间信息处理、雷达及雷达对抗理论与技术
阮怀林：男，1964年生，教授，博士生导师，研究方向为空间信息处理、雷达及雷达对抗理论与技术、压缩感知理论
吴晨曦：男，1988年生，博士，讲师，研究方向为阵列信号处理、稀疏重构技术
钟华：男，1991年生，博士生，研究方向为空间信息处理、定位理论与技术
吴世龙：男，1978年生，副教授，主要研究方向为空间信息处理、定位理论与技术
通讯作者:孙兵 sunbing137210@126.com
中图分类号:TN911.23计量
文章访问数:302
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被引次数:0
出版历程
收稿日期:2021-01-08
修回日期:2021-03-30
网络出版日期:2021-04-02
刊出日期:2021-12-21
Underdetermined Direction of Arrival Estimation for Coprime Array in the Presence of Nonuniform Noise
Bing SUN,,Huailin RUAN,
Chenxi WU,
Hua ZHONG,
Shilong WU
College of Electronic Engineering, National University of Defense Technology, Hefei 230037, China
Funds:The National Natural Science Foundation of China (61171170), The Anhui Province Natural Science Foundation (1908085QF280)
摘要
摘要:针对基于互质阵列的欠定DOA估计方法在非均匀噪声条件下性能下降的问题，该文提出一种基于协方差矩阵重构和矩阵填充的鲁棒DOA估计方法。首先，将接收数据协方差矩阵分解，得到包含非均匀噪声项的对角阵；然后，选取对角线元素中的最小值，替换其余对角线元素，进而得到重构后的数据协方差矩阵；最后，对重构后的协方差矩阵进行扩展和矩阵填充，结合子空间方法进行DOA估计。理论分析和仿真结果表明，相对于现有方法，该文方法有效地抑制了非均匀噪声的影响，有更好的DOA估计性能。
关键词:波达方向估计/
互质阵列/
非均匀噪声
Abstract:The underdetermined Direction Of Arrival (DOA) estimation method based on the coprime array will degrade in the presence of nonuniform noise. To address this problem, a robust DOA estimation method based on covariance matrix reconstruction and matrix completion is proposed in this paper. Firstly, the covariance matrix of the received data is decomposed to obtain a diagonal matrix containing non-uniform noise terms. Then, the minimum value of the diagonal matrix elements is selected to replace the remaining diagonal matrix elements to obtain the reconstructed data covariance matrix. Finally, based on the matrix completion theory, the reconstructed covariance matrix is extended and filled, and the subspace method is used for DOA estimation. Theoretical analysis and simulation results show that, compared with the existing methods, the proposed method suppresses effectively the influence of nonuniform noise and has better DOA estimation performance.
Key words:Direction Of Arrival (DOA)/
Coprime array/
Nonuniform noise
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