文献类型：会议论文

英文题名：An Active Set Approximation Method for the Design of Broadband Beamformer

作者：Tan, Xiaofen[1]; Xiao, Mei[1]; Feng, Zhiguo[2]

机构：[1] Chongqing Normal University, School of Mathematical Sciences, Chongqing, China; [2] Guangdong Ocean University, Faculty of Mathematics and Computer Science, Zhanjiang, Guangdong, China

会议论文集：Proceedings of 2018 IEEE 3rd International Conference on Cloud Computing and Internet of Things, CCIOT 2018

会议日期：October 20, 2018 - October 21, 2018

会议地点：Dalian, China

语种：英文

外文关键词：Mathematical programming - Beamforming - FIR filters - Approximation theory - Microphone array

外文摘要：The microphone array beamformer design problem in far-field environment is to design the coefficients of FIR filters such that the maximum error between the actual response and the desired response in a specified domain is minimized. The specified domain is always very large and this problem is a large scale optimization problem. In general the complexity of the optimal method for solving this problem is very expensive. This paper applies an active set approximation method to solve this problem. First, this paper transforms this problem into a semi-infinite programming problem. Next, this paper finds an approximate active set such that the scale of the problem can be mostly reduced. Then, this problem can be solved efficiently and the approximate solution is very close to the optimal solution. Numerical experiments are illustrated to show the efficiency of the proposed method. ? 2018 IEEE.