基于球谐域MVDR波束形成技术的远场多声源定位

We propose a multiple far-field acoustic sources localization algorithm based on minimum-variance distortionless response (MVDR) beamforming in spherical harmonic domain in this paper. The beamforming technique is extended into spherical harmonic domain to generate a general expression for beamformer, and then multiple acoustic sources can be localized using MVDR beamforming technique in spherical harmonic domain. The computational complexity of the algorithm can be greatly reduced in spherical harmonic domain. Experiments are carried out using 98-element trijunctional spherical microphone array. And the results show that the proposed MVDR beamforming based algorithm has better localization performance than those regular beamforming based ones.