Ad Hoc Microphone Array Beamforming Using the Primal-Dual Method of Multipliers

Conference paper (2016)

Authors

V.M. Tavakoli Aalborg University
J Jensen Aalborg University
R. Heusdens Signal Processing Systems - EEMCS , Aalborg University
Jacob Benesty University of Quebec
M.G. Christensen Aalborg University
Research Group
Signal Processing Systems (EEMCS) (TU Delft)
Distributed beamforming Speech enhancement Primal-dual method of multipliers Ad hoc microphone array
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Published Date

01-12-2016

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Signal Processing Systems

Abstract

In the recent years, there have been an increasing amount of researches aiming at optimal beamforming with ad hoc microphone arrays, mostly fusion-center-based schemes. However, huge computational complexities and communication overheads impede many of these algorithms from being useful in practice. In this paper, we propose a low-footprint optimization approach to reduce the convergence time and overheads for the distributed beamforming problem. We transcribe the pseudo-coherence-based beamforming which is insightful for taking into account the nature of speech. We formulate the distributed minimum variance distortionless response beamformer using the primal-dual method of multipliers. Our experiments confirm the fast convergence using the proposed distributed algorithm. It is also shown how a hard limit on the number of iterations affects the performance of the array in noise and interference suppression.