Two dimensional angle estimation using separate nested acoustic vector sensor array
Jianfeng Li, Feng Wang, Xiaofei Zhang · 2017
In this paper, two dimensional angle estimation using a new array structure named separate nested acoustic vector sensor (AVS) array is studied. Unlike traditional AVS array, where the pressure sensor and velocity sensors are collocated in space, the separate nested AVS array has two separate and nested subarrays including the pressure sensor array and the velocity vector sensor array. With the extended vectorization of the cross covariance matrix between the two arrays, 2M2-1 degrees of freedom (DOF) can be achieved with only M physical acoustic vector sensors. After analyzing the fitting error, only one dimensional sparse representation is required to estimate the two dimensional angle with automatically pairing. Compared to conventional AVS array based methods, the proposed scheme can achieve better angle estimation performance and handle more sources. Simulation results verify the effectiveness of the proposed method.