基于改进MUSIC的声源定位方法  

Sound source localization method based on improved MUSIC

作　　者：李蜀丰 徐永绍 刘秉政 李鹏威 李宜鑫 尚浩天 Li Shufeng;Xu Yongshao;Liu Bingzheng;Li Pengwei;Li Yixin;Shang Haotian(CNNC maintenance Co.,Ltd Shenzhen Branch,Shenzhen 518116,China;Northeast Electric Power University Jilin 132012,China)

机构地区：[1]中核检修有限公司深圳分公司技术部,深圳518116 [2]中核检修有限公司深圳分公司,深圳518116 [3]东北电力大学自动化工程学院,吉林132012

出　　处：《电子测量与仪器学报》2021年第8期212-219,共8页Journal of Electronic Measurement and Instrumentation

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°。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.

关 键 词：声源定位 MUSIC算法 广义互相关算法 均匀圆阵 

分 类 号：TN912.3[电子电信—通信与信息系统]