Direction-of-arrival estimation for extensible acoustic vector sensor array  

作　　者：ZHANG Jun CHEN Zhifei CHANG Jihong XU Xiangyuan YANG Jianhua BAO Ming 

机构地区：[1]Northwestern Polytechnical University, Xi'an 710129 [2]Institute of Acoustics Chinese Academy of Sciences Beijing, 100190 [3]66242 troops of the Chinese People's Liberation Army Xilingol, 011216

出　　处：《Chinese Journal of Acoustics》2020年第2期207-228,共22页声学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11125420,11174312)。

摘　　要：Aiming at high-resolution estimation of the direction-of-arrival of closely-spaced sources at low signal-to-noise ratio regions, this paper proposes a DOA estimation algorithm that is suitable for an extensible acoustic vector sensor array. Taking the 3D array composed of the minimum number(four) of acoustic vector sensors as the acquisition module, a virtual array having the same structure as the original array structure is extended in the three-dimensional space based on the aperture expansion characteristic of higher-order cumulants. The virtual array and the real array can construct a matrix with rotational invariance, which contains the angular information for estimating DOA. The Cramer-Rao bound of the algorithm are derived. We analyze the influence of SNR, the number of snapshots and the elevation angle on the performance of the algorithm. Simulation results show that the proposed algorithm has better noise suppression ability and higher resolution in DOA estimation than the conventional ESPRIT algorithm using the acoustic vector array. Experiments are conducted to validate the proposed algorithm.

关 键 词：ESTIMATION ALGORITHM noise 

分 类 号：TN911.7[电子电信—通信与信息系统] TP212[电子电信—信息与通信工程]