高级波束成形在旋转声源定位中的应用

Application of advanced beamforming in rotating sound source localization

为了使高级波束成形中的函数波束成形、压缩感知波束成形、正交波束成形在旋转声源定位中获得广泛应用,对3种高级波束成形在旋转声源定位中的应用进行了研究,从声源空间分辨率,动态范围以及声源功率积分上与传统旋转波束成形和DAMAS(deconvolution approach for the mapping of acoustic sources)反卷积作对比。仿真与实验结果表明:3种高级波束成形均可以应用到旋转声源定位中,并且均能显著提升旋转声源空间分辨率和动态范围以及拥有较高的计算效率。函数波束成形在低频段的空间分辨率低于DAMAS并且容易产生较高的声源功率积分误差。压缩感知波束成形整体性能与DAMAS相近,并且在低频段的空间分辨率比DAMAS有优势。正交波束成形在低频段容易产生声源定位位置误差,抗干扰能力较弱,并且声源功率积分整体低于DAMAS。

Functional beamforming, compressive sensing beamforming, and orthogonal beamforming in advanced beamforming have not been widely used in rotating sound source localization. The applications of three above advanced beamforming in rotating sound source localization were studied, and compared with conventional rotating beamforming and deconvolution approach in terms of the spatial resolution, dynamic range and source power integration for the mapping of acoustic sources(DAMAS). The simulation and experiment results showed that the three advanced beamforming can be applied to the rotating sound source localization successfully, and also can significantly improve the spatial resolution and dynamic range of the rotating sound source with higher computation efficiency. The functional beamforming had a lower spatial resolution than DAMAS in the low frequency band and was prone to high source power integration error. The performance of compressive sensing beamforming was closest to DAMAS, and the spatial resolution in the low frequency band was better than DAMAS. Orthogonal beamforming was prone to generate sound source localization position error within the low frequency range, the ability of anti-interference was weak, and source power integration was lower than DAMAS.