Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8093
Title: The design of multi-dimensional acoustic beamformers via window functions
Authors: Feng, ZG
Yiu, KFC 
Keywords: Fast beamformer design
Multi-dimensional beamformers
Nearfield beamformers
Semi-infinite programming
Window functions
Issue Date: 2014
Publisher: Academic Press Inc Elsevier Science
Source: Digital signal processing : a review journal, 2014, v. 29, no. 1, p. 107-116 How to cite?
Journal: Digital Signal Processing: A Review Journal 
Abstract: The design of broadband beamformers can be formulated as a semi-infinite programming optimization problem, where the coefficients of the filters are determined such that the actual response of the microphone array is near a given desired response. This problem can be solved by existing optimization solvers after the discretization of the infinite constraints. However, this problem will become large-scale and it's expensive to find the optimal solution, as the discretization points grow and the filter length increases. In this paper, we propose a fast method based on the window functions. First, we formulate a simplified optimization problem to find the limit of the cost function values as the filter length is sufficiently long. Hence, the optimal frequency response vector is obtained and the corresponding filter coefficients can be calculated. Second, we apply the window method to truncate the limiting filter to obtain a finite FIR filters. The performance as well as the computational complexity are investigated to demonstrate the effectiveness and efficiency of the proposed method.
URI: http://hdl.handle.net/10397/8093
ISSN: 1051-2004
DOI: 10.1016/j.dsp.2014.02.012
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

4
Last Week
0
Last month
0
Citations as of Aug 14, 2017

WEB OF SCIENCETM
Citations

6
Last Week
0
Last month
0
Citations as of Aug 21, 2017

Page view(s)

40
Last Week
3
Last month
Checked on Aug 20, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.