| 各向同性噪声场中单矢量传感器虚源消除MUSIC测向方法 |
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| 引用本文： | 柳艾飞,杨德森,时胜国,朱中锐.各向同性噪声场中单矢量传感器虚源消除MUSIC测向方法[J].声学学报,2019,44(4):698-706. |
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| 作者姓名： | 柳艾飞 杨德森 时胜国 朱中锐 |
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| 作者单位： | 1. 哈尔滨工程大学 水声技术重点实验室 哈尔滨 150001; |
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| 基金项目： | 国家自然科学基金项目(61701133)中央高校基本科研业务费专项资金项目(HEUCFJ180502,HEUCFM180505)水声技术重点实验室稳定支持课题(SSJSWDZC2018003)资助 |
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| 摘 要： | 针对各向同性噪声场中,单矢量水声传感器声压通道和振速通道的噪声功率不一致性造成MUSIC测向方法性能急剧下降的问题,提出了一种增秩MUSIC测向方法和一种幅度加权MUSIC测向方法。增秩MUSIC测向方法通过增加信号子空间维度消除虚源的影响,在单目标情况和低信噪比时可获得高精度方位估计结果,其性能接近克拉美洛界限(CRB),但它不能分辨双目标;幅度加权MUSIC测向方法通过对接收信号幅度加权消除了虚源,并且能分辨双目标。
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| 关 键 词： | 单矢量传感器 角度估计 多重信号分类方法 虚源 |
| 收稿时间： | 2018-05-15 |
MUSIC Direction of arrival estimation method with virtual source elimination for single vector sensor under isotropic ambient noise background |
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| Institution: | 1. Acoustic Science and Technology Laboratory, Harbin Engineering University Harbin 150001;2. Key Laboratory of Marine Information Acquisition and Security, Ministry of Industry andInformation Technology (Harbin Engineering University) Harbin 150001;3. College of Underwater Acoustic Engineering, Harbin Engineering University Harbin 150001 |
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| Abstract: | In the scenario of isotropic ambient noise,the inequality between the noise powers of the pressure and velocity channels of a single vector acoustic sensor dramatically degrades the performance of the MUSIC method.In order to solve this problem,an increased-rank MUSIC method and a weighted-amplitude MUSIC method are presented.The increased-rank MUSIC method augments the dimension of the signal subspace to eliminate the effect of the virtual source.It gains the highest estimation accuracy in the case of one source and a low Signal-to-Noise Ratio(SNR) and its performance approaches to the CRB.However,it fails in the case of two sources.The weighted-amplitude MUSIC method weights the amplitude of the received signal to eliminate the virtual source and it can identify two sources. |
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