Research on acoustic vector sensor array MUSIC algorithm based on pretreatment of information in the field of array unit

To improve the resolution of azimuth angle estimation using an Acoustic Vector Sensor Array (AVSA), a MUSIC algorithm based on AVSA is carried out. The performance of traditional MUSIC algorithm is improved in resolution of DOA, gain of AVSA, and ability of distinguishing multiple targets through pretreatment of pressure and particle velocity in array unit field. Analysis in theory and computer simulations show that the algorithm proposed is more effective in resolution of multiple targets, ability to suppress interference and accuracy in the case of low signal to noise ratio (SNR) than the traditional algorithm in isotropic noise field. The method has broader and more flexible applications compared with the early ones.