New method for estimating 2-D DOA in the coherent source environment based on data matrix reconstruction |
| |
Authors: | WANG Ling LI Guolin LIU Jianqiang MAO Weiping |
| |
Affiliation: | (1. No. 7 Dept., Naval Aeronautics and Astronautics Univ., Yantai 264001, China;2. Institute of Specification and Standard, Navy Academy of Armament, Shanghai 200235, China) |
| |
Abstract: | The performance of classical two dimensional (2-D) Direction-Of-Arrival (DOA) estimation algorithms degrade substantially in the presence of coherent environment. A new DOA matrix method——DOA matrix method based on data matrix reconstruction (DMR-DOAM) is proposed for 2-D DOA estimation in the coherent source environment. The proposed algorithm reconstructs two Toeplitz equivalent covariance matrices by using cross-correlation information among receiving data from arrays. Decorrelation and 2-D DOA estimation can be realized via the eigen-decomposition of the new DOA matrix. The algorithm can retain the advantages of the traditional DOA matrix method, such as automatical parameter alignment and no need of 2-D search spectrum peak. The equivalent covariance matrices only use the middle column of classical covariance matrices, so the calculation amount is reduced, and the algorithm can be realized easily. Furthermore, the paper analyzes the estimation performance and influencing factors of the proposed algorithm. Theoretical analyses and simulation results both show that the proposed algorithm is effective. |
| |
Keywords: | array signal processing direction of arrival 2-D DOA estimation coherent signals Toeplitz matrix decorrelation parameter estimation |
|
| 点击此处可从《西安电子科技大学学报(自然科学版)》浏览原始摘要信息 |
|
点击此处可从《西安电子科技大学学报(自然科学版)》下载全文 |