Design of broadband beamformers with low complexity

Feng, Zhiguo and Yiu, Cedric Ka Fai and Teo, Kok Lay and Nordholm, Sven. 2012. Design of broadband beamformers with low complexity. EURASIP Journal on Advances in Signal Processing. 2012:62.

Source Title

EURASIP Journal on Advances in Signal Processing

DOI

10.1186/1687-6180-2012-62

ISSN

1687-6180

Remarks

This article is published under the Open Access publishing model and distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/2.0/ Please refer to the licence to obtain terms for any further reuse or distribution of this work.

URI

http://hdl.handle.net/20.500.11937/33863

Collection

Curtin Research Publications

Abstract

In this article, we consider the design of broadband beamformers with low complexity. In fact, the design problem is multi-objective in nature, trading off between speech distortion and noise suppression. Finding a balance between these two objectives is important in order to achieve a desired sound quality. These measures are introduced as the objectives here. The design can then be obtained via a bi-objective integer programming problem, where the coefficients of the filters are expressed as sums of signed powers-of-two terms. We study two different integer spaces and penalty functions for solving the problem. Then, an algorithm based on a discrete filled function is developed for finding the optimal design. In order to illustrate the effectiveness of the algorithm, real data is used and two broadband beamformers are demonstrated.