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论文:2023,Vol:41,Issue(3):574-578 |
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引用本文： |
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张明洋, 查淞元, 刘雨东. 基于特征值聚类的MUSIC算法[J]. 西北工业大学学报 |
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ZHANG Mingyang, ZHA Songyuan, LIU Yudong. MUSIC algorithm based on eigenvalue clustering[J]. Journal of Northwestern Polytechnical University |
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| 基于特征值聚类的MUSIC算法 |
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| 张明洋, 查淞元, 刘雨东 |
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| 上海船舶电子设备研究所, 上海 201108 |
| 摘要: |
| 传统MUSIC算法需要预先知道目标信号源的个数，进一步确定信号子空间和噪声子空间的维数，最后进行谱峰搜索。在实际工程中，无法预知待测目标的个数，针对这一问题，提出了一种基于密度聚类算法的改进型MUSIC算法。该算法将协方差矩阵的特征值进行聚类，通过DBSCAN聚类算法可求出目标信号源的个数，再进一步估计出目标的方位。仿真结果表明：提出的改进算法在信号源个数未知的情况下能够准确估计出信号源的个数和方位，较传统的MUSIC算法有更大实用性。 |
| 关键词:
波达方向估计
DBSCAN算法
MUSIC算法
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| MUSIC algorithm based on eigenvalue clustering |
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| ZHANG Mingyang, ZHA Songyuan, LIU Yudong |
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| Shanghai Marine Electronic Equipment Research Institute, Shanghai 201108, China |
| Abstract: |
| The traditional MUSIC algorithm needs to know the number of target signal sources in advance, and further determine the dimensions of signal subspace and noise subspace, and finally search for spectral peaks. In engineering, it is impossible to predict the number of target signal sources to be measured. To solve the above-mentioned problem, an improved MUSIC algorithm without estimating the number of target signal sources is proposed. In the present algorithm, all eigenvectors of covariance matrix are regarded as noise subspace for spectral estimation, but the existence of signal subspace will make the result unreliable. In order to make the estimation result more accurate, a new weighting method for the spectral estimation results of noise subspace and signal subspace is proposed. The simulation results show that the improved algorithm can accurately estimate the number and direction of signal sources when the number of signal sources is unknown, and has greater practicability than the traditional MUSIC algorithm. In addition, the improved algorithm has better robustness. |
| Key words:
DOA estimation
DBSCAN algorithm
MUSIC algorithm
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| 收稿日期: 2022-07-26
修回日期:
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| DOI: 10.1051/jnwpu/20234130574 |
| 通讯作者: 刘雨东(1972—),上海船舶电子设备研究所研究员,主要从事水声信号处理研究。e-mail:315267594@qq.com
Email：315267594@qq.com |
| 作者简介: 张明洋(1998—),上海船舶电子设备研究所硕士研究生,主要从事水声信号处理研究。
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