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所属单位：电子信息工程学院
发表刊物：APPLIED ACOUSTICS
关键字：Spherical modal beamforming Microphone array Broadband beamforming Beam steering Time-domain structure
摘要：It is noted that the existing time-domain implementation structure for steerable spherical modal beam formers is only applicable to the specific beamformers with rotationally symmetric beampatterns about the look direction, which may limit its applications. To overcome the restriction, this paper presents an alternative time-domain implementation structure for spherical modal beamformers using the Wigner-D function, which enables three-dimensional beam steering with arbitrary patterns. In particular, a necessary condition for guaranteeing only real-valued operations to make the time-domain implementation viable is derived. Design examples are presented to demonstrate the effectiveness of the presented time-domain modal beamformer structure. (C) 2017 Elsevier Ltd. All rights reserved.
ISSN号：0003-682X
是否译文：否
发表时间：2017-07-01
合写作者：Ren, Weiyi,Gao, Weixia
通讯作者：陈华伟