您当前所在位置: 首页 > 学者

鄢社锋

  • 3浏览

  • 0点赞

  • 0收藏

  • 0分享

  • 0下载

  • 0评论

  • 引用

期刊论文

Optimal design of modal beamformers for circular arrays

暂无

The Journal of the Acoustical Society of America,2015,138(4): | 2015年10月15日 | https://doi.org/10.1121/1.4929932

URL:https://asa.scitation.org/doi/abs/10.1121/1.4929932

摘要/描述

An approach to optimal design of circular harmonics based modal beamformers for circular arrays is presented. Theoretical analysis shows the equivalence between the element-space and circular-harmonics-domain beamformers. By deriving the expression for the signal and noise covariance matrices, array manifold, and the array response in terms of the circular-harmonics-domain beamforming weights, the weights design problem is formulated as one of minimum variance distortionless response beamforming in the circular harmonics domain. It is found that the well-known phase-mode beamformer for circular arrays can be viewed as an ideal minimum variance distortionless response beamformer against the planarly isotropic noise in the circular harmonics domain. This interesting result is useful for analyzing and evaluating the performance of the phase-mode circular arrays. In this circular-harmonics-domain beamformer, additional constraints can be imposed to improve its robustness and control the sidelobes, which is important in practical applications. The developed approach can include both the delay-and-sum and phase-mode beamformers as special cases, which leads to very flexible designs. Simulation and experimental results show excellent performance of the proposed beamforming approach.

关键词:

学者未上传该成果的PDF文件,请等待学者更新

我要评论

全部评论 0

本学者其他成果

    同领域成果