Observer-based beamforming algorithm for acoustic array signal   processing

doi:10.1121/1.3658448

CORC > 北京大学 > 工学院

	Observer-based beamforming algorithm for acoustic array signal processing
	Bai, Long ; Huang, Xun
刊名	journal of the acoustical society of america
	2011
关键词	NONLINEAR OUTPUT MICROPHONE ARRAY
DOI	10.1121/1.3658448
英文摘要	In the field of noise identification with microphone arrays, conventional delay-and-sum (DAS) beamforming is the most popular signal processing technique. However, acoustic imaging results that are generated by DAS beamforming are easily influenced by background noise, particularly for in situ wind tunnel tests. Even when arithmetic averaging is used to statistically remove the interference from the background noise, the results are far from perfect because the interference from the coherent background noise is still present. In addition, DAS beamforming based on arithmetic averaging fails to deliver real-time computational capability. An observer-based approach is introduced in this paper. This so-called observer-based beamforming method has a recursive form similar to the state observer in classical control theory, thus holds a real-time computational capability. In addition, coherent background noise can be gradually rejected in iterations. Theoretical derivations of the observer-based beamforming algorithm are carefully developed in this paper. Two numerical simulations demonstrate the good coherent background noise rejection and real-time computational capability of the observer-based beamforming, which therefore can be regarded as an attractive algorithm for acoustic array signal processing. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3658448]; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000298569100038&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Acoustics; Audiology & Speech-Language Pathology; SCI(E); EI; PubMed; 6; ARTICLE; 6; 3803-3811; 130
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/153966]
专题	工学院
推荐引用方式 GB/T 7714	Bai, Long,Huang, Xun. Observer-based beamforming algorithm for acoustic array signal processing[J]. journal of the acoustical society of america,2011.
APA	Bai, Long,&Huang, Xun.(2011).Observer-based beamforming algorithm for acoustic array signal processing.journal of the acoustical society of america.
MLA	Bai, Long,et al."Observer-based beamforming algorithm for acoustic array signal processing".journal of the acoustical society of america (2011).