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。

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

Abstract: 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.

Key words: localization ambiguity, nested uniform linear array, near-field 3D MUSIC algorithm, wideband focusing algorithm, speech source localization

中图分类号: 

• TP301.6