信息工程大学学报2025，Vol.26Issue(1)：8-13,112,7.DOI:10.3969/j.issn.1671-0673.2025.01.002
基于虚拟多通道的时间调制超表面DOA估计方案
Virtual Multi-channel Direction of Arrival Estimation for Time-varying Metasurfaces
摘要
Abstract
To address the problems of high complexity and low accuracy associated with existing time-domain direction of arrival(DOA)estimation schemes,a novel approach based on virtual multi-chan-nel in time-varying metasurface(TVM)is proposed.The harmonic properties of TVM are exploited in this method,with the incident signal being modulated by a periodic modulation function.This modula-tion maps the single-channel received signal to multiple harmonics,effectively equivalent to multi-channel reception by distributing the single-channel signal across multiple harmonic orders.Subse-quently,an orthogonal pattern is designed to receive the signal,resulting in the acquisition of mutually independent virtual multi-channel signals.The autocorrelation matrix is then estimated using the Fou-rier coefficient matrix related to the modulation function,and the multi-signal classification(MUSIC)algorithm is employed for DOA estimation.Numeric simulations have demonstrated the validity of the virtual multi-channel scheme.The performance of this approach closely approximates that of DOA esti-mation based on multi-channel arrays.关键词
DOA估计/时间调制超表面/多信号分类算法Key words
DOA estimation/time-varying metasurface/multiple signal classification分类
信息技术与安全科学引用本文复制引用
陈明,金梁,许晓明,孙小丽..基于虚拟多通道的时间调制超表面DOA估计方案[J].信息工程大学学报,2025,26(1):8-13,112,7.基金项目
国家自然科学基金(U22A2001) （U22A2001）
嵩山实验室资助项目(221100211300-0X) （221100211300-0X）
