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本文提出一种基于球谐域最小方差无失真响应(MVDR)波束形成技术的三维空间远场多声源定位算法,该算法将波束形成技术推广到球谐域中,得到球谐域波束形成器的一般表达式,进而利用球谐域MVDR波束形成技术实现三维空间多声源的定位。将波束形成技术推广到球谐域中可有效地减少运算量。利用98元三线交点球麦克风阵列进行声源定位对比实验,结果表明:基于球谐域MVDR波束形成技术的声源定位算法比基于球谐域常规波束形成技术的声源定位算法具有更高的定位精度。
In this paper, we propose a three-dimensional far-field multi-source localization algorithm based on spherical-region minimum variance distortionless response (MVDR) beamforming. This algorithm extends the beamforming technique into the spherical-ball domain and obtains the spherical harmonic beamformer The general expression of MVDR beamforming technology is used to realize the multi-source localization in 3D space. Popularizing the beamforming technology into the spherical harmonic field can effectively reduce the computational complexity. The experimental results show that the sound source localization algorithm based on the spherical harmonic MVDR beamforming technology has a higher localization than the sound source localization algorithm based on the spherical beam conventional beamforming technology Accuracy.