High-Precision Time Delay Estimation Based on Closed-Form Offset Compensation  

作　　者：Yingying Li Hang Jiang Lianjie Yu Jianfeng Li 

机构地区：[1]The Key Laboratory of Dynamic Cognitive Systemof Electromagnetic Spectrum Space,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,211106,China [2]State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan University,Haikou,570100,China

出　　处：《Computer Modeling in Engineering & Sciences》2023年第3期2123-2136,共14页工程与科学中的计算机建模（英文）

基　　金：supported in part by National Key R&D Program of China under Grants 2020YFB1807602 and 2020YFB1807600;National Science Foundation of China(61971217,61971218,61631020,61601167);the Fund of Sonar Technology Key Laboratory(Range estimation and location technology of passive target viamultiple array combination),Jiangsu Planned Projects for Postdoctoral Research Funds(2020Z013);China Postdoctoral Science Foundation(2020M681585).

摘　　要：To improve the estimation accuracy,a novel time delay estimation(TDE)method based on the closed-form offset compensation is proposed.Firstly,we use the generalized cross-correlation with phase transform(GCC-PHAT)method to obtain the initial TDE.Secondly,a signal model using normalized cross spectrum is established,and the noise subspace is extracted by eigenvalue decomposition(EVD)of covariance matrix.Using the orthogonal relation between the steering vector and the noise subspace,the first-order Taylor expansion is carried out on the steering vector reconstructed by the initial TDE.Finally,the offsets are compensated via simple least squares(LS).Compared to other state-of-the-art methods,the proposed method significantly reduces the computational complexity and achieves better estimation performance.Experiments on both simulation and real-world data verify the efficiency of the proposed approach.

关 键 词：Time delay estimation(TDE) time difference of arrival(TDOA) taylor expansion SUPER-RESOLUTION 

分 类 号：O17[理学—数学]