A penalized inequality-constrained minimum variance beamformer with applications in hearing AIDS

Wenqiang Pu, Jinjun Xiao, Tao Zhang, Zhi Quan Luo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

A well known challenge in linearly-constrained beamforming is how to suppress multiple interferences when the degrees of freedom (DoF) provided by the array are fewer than the number of sources in the environment. In this paper, we propose a beamformer design to address this challenge. Specifically, we propose a min-max beam-former design that penalizes the spatial responses on all interferences' directions. The new design can efficiently mitigate the total interference power regardless of whether the number of interfering sources is less than the array DoF or not. We formulate this min-max beamformer design as a convex second-order cone programming (SOCP) and proposed a low complexity iterative algorithm based on alternating direction method of multipliers (ADMM) method to solve it. In the simulation, we compare the proposed beamfomer with the linearly constrained minimum variance (LCMV) beamformer and a recently proposed inequality-constrained minimum variance (ICMV) beamformer [1]. The ability of the proposed beamformer to handle more interferences is demonstrated.

Original languageEnglish (US)
Title of host publication2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages175-179
Number of pages5
ISBN (Electronic)9781538616321
DOIs
StatePublished - Dec 7 2017
Event2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017 - New Paltz, United States
Duration: Oct 15 2017Oct 18 2017

Publication series

NameIEEE Workshop on Applications of Signal Processing to Audio and Acoustics
Volume2017-October

Other

Other2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
CountryUnited States
CityNew Paltz
Period10/15/1710/18/17

Keywords

  • Microphone array signal processing
  • acoustic beamforming
  • binaural hearing AIDS
  • degrees of freedom

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