Design of robust differential microphone arrays with orthogonal polynomials.
Design of robust differential microphone arrays with orthogonal polynomials.
复制标题
DOI：
10.1121/1.4927690
复制
发表时间：
2015-08
期刊：
影响因子：
--
通讯作者：
Chao Pan;J. Benesty;Jingdong Chen
中科院分区：
文献类型：
--
作者：
Chao Pan;J. Benesty;Jingdong Chen
Differential microphone arrays have the potential to be widely deployed in hands-free communication systems thanks to their frequency-invariant beampatterns, high directivity factors, and small apertures. Traditionally, they are designed and implemented in a multistage way with uniform linear geometries. This paper presents an approach to the design of differential microphone arrays with orthogonal polynomials, more specifically with Jacobi polynomials. It first shows how to express the beampatterns as a function of orthogonal polynomials. Then several differential beamformers are derived and their performance depends on the parameters of the Jacobi polynomials. Simulations show the great flexibility of the proposed method in terms of designing any order differential microphone arrays with different beampatterns and controlling white noise gain.
