阵元失效对克罗内克积波束形成性能的影响  

The impact of invalidated microphones on the performance of Kronecker product-based beamformer

作　　者：戴金洲 沙硕 厉剑 孟维鑫[2,3] 郑成诗 DAI Jinzhou;SHA Shuo;LI Jian;MENGWeixin;ZHENG Chengshi(Beijing Institute of Metrology,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]北京市计量检测科学研究院,北京100029 [2]中国科学院大学,北京100049 [3]中国科学院声学研究所,北京100190

出　　处：《声学技术》2022年第4期586-593,共8页Technical Acoustics

基　　金：国家市场监督管理总局科技计划项目(2020MK002)。

摘　　要：对于一类规则阵型,可以引入克罗内克积提高最小方差无失真响应波束形成器的鲁棒性,同时降低其运算复杂度;然而,对于阵元数较多的规则阵列,阵元失效的可能性大幅增加,当某些阵元失效时,规则阵列不满足克罗内克分解。针对常见阵元失效问题,文章研究了阵元失效的三种情况对最小方差无失真响应波束形成器与克罗内克积自适应波束形成的性能影响。仿真与实验结果证明,信号完全缺失的通道对自适应波束形成器的影响最大,信号重复的通道对自适应波束形成器的影响最小。文章据此提出了一种低复杂度的信号恢复方法,通过使用相邻通道的信号代替信号缺失通道,提升阵元失效情况下的波束形成性能。For some regular microphone arrays,the Kronecker product(KP)decomposition can be used to improve the robustness of the minimum variance distortionless response(MVDR)beamformer,as well as to reduce its computational complexity.When the number of microphones becomes large,the Kronecker product decomposition may lose effectiveness due to increased possibility of microphones damage.In this paper,three different categories of microphone invalidations are studied and their impacts on the performance of the MVDR and the Kronecker product-based adaptive beamformers are analyzed.Simulation and experimental results show that the microphone channels completely missing signals have the greatest impact on beamformers,while the microphone channels with duplicated signals have the least impact.According to these results,a low-complexity signal recovery method is proposed,which uses the signal of adjacent channel to replace the signal missing channels to improve beamforming performance in the case of microphones invalidation.

关 键 词：鸣笛信号增强 波束形成 克罗内克积 阵元受损 

分 类 号：TN911.7[电子电信—通信与信息系统]