嵌套均匀线阵的近场声源三维定位算法  

Near Field Speech Source 3D Localization Algorithm of Nested Uniform Linear Array

作　　者：曾宪燎 李炜[1] 

机构地区：[1]电子科技大学电子科学技术研究院,成都611731

出　　处：《计算机工程》2016年第2期307-311,共5页Computer Engineering

基　　金：国家自然科学基金资助项目(61403065);中央高校基本科研业务费专项基金资助项目(ZYGX2011J130);教育部博士点基金资助项目(20120185120034);四川省基础科研计划基金资助项目(2015JY0084)

摘　　要：以提高定位精度、消除定位模糊为出发点,提出基于两次定位的嵌套均匀线阵结构。第一次粗定位采用的阵元间距不大于语音信号最小半波长,在此基础上,第二次采用阵元间距较大的阵列对相同的声源进行细定位。在使用近场声源高分辨率的三维MUSIC算法时,会带来较高的计算复杂度,采用宽带聚焦算法使其时延得到较大幅度的降低。仿真结果表明,该算法的定位效果优于非嵌套定位算法。The twice position nested uniform linear array configuration is proposed to eliminate the localization ambiguity and improve the localization accuracy. In the first localization,array elements spacing is not greater than the minimum half wavelength of speech signals. The second localization is depend on the previous results,using the array elements spacing larger than previous for precise localization. Moreover,as the utilization of near-field acoustic source 3D MUSIC algorithm with high resolution results in high computing complexity,wideband focusing algorithm is adopted to make the delay time being reduced greatly. Simulation results show that this scheme has better localization effect than that of non-nested localization algorithm.

关 键 词：定位模糊 嵌套均匀线阵 近场三维MUSIC算法 宽带聚焦算法 声源定位 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]