| 李蜀丰,徐永绍,刘秉政,李鹏威,李宜鑫,尚浩天.基于改进 MUSIC 的声源定位方法[J].电子测量与仪器学报,2021,35(8):212-219 |
| 基于改进 MUSIC 的声源定位方法 |
| Sound source localization method based on improved MUSIC |
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| DOI： |
| 中文关键词: 声源定位 MUSIC 算法 广义互相关算法 均匀圆阵 |
| 英文关键词:sound source localization MUSIC algorithm generalized cross-correlation algorithm uniform circular array |
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| 中文摘要: |
| 为设计更有效的声源定位方法,深入研究了传统 MUSIC 算法,并针对其分辨率低且在麦克风数目较少时波达方向
(direction of arrival,DOA)估计精度较差等问题,对传统 MUSIC 算法进行了优化,利用广义互相关算法估计出声源信号到达各
麦克风之间的时间差,并据此构建出对应的矢量信号,最后通过计算谱函数确定 DOA 估计值。 仿真和实验结果表明,优化后的
MUSIC 算法可以得到更加尖锐的指向性波束,更低的旁瓣,并且能使方位角的定位精度达到±4°,俯仰角的定位精度达到±5°。 |
| 英文摘要: |
| In order to solve the problem of low resolution and poor estimation accuracy of direction of arrival (DOA) when the number of
microphones is small, so that designing an effective sound source localization system, this paper deeply studies and optimizes the MUSIC
algorithm. The generalized cross-correlation is used to estimate the time difference between the sound source signals reaching each
microphone, and building the corresponding vector signal. Finally, the DOA estimation value is determined by calculating the spectral
function. The simulation and experimental results show that the optimized MUSIC algorithm can get sharper directional beam, lower
sidelobe, and the positioning accuracy of azimuth angle can reach ±4° and elevation angle can reach ±5° respectively. |
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