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Journal of Signal Processing Systems

, Volume 63, Issue 3, pp 265–275 | Cite as

DOA Estimation for Multiple Sparse Sources with Arbitrarily Arranged Multiple Sensors

  • Shoko ArakiEmail author
  • Hiroshi Sawada
  • Ryo Mukai
  • Shoji Makino
Article

Abstract

This paper proposes a method for estimating the direction of arrival (DOA) of multiple source signals for an underdetermined situation, where the number of sources N exceeds the number of sensors M (M < N). Some DOA estimation methods have already been proposed for underdetermined cases. However, since most of them restrict their microphone array arrangements, their DOA estimation ability is limited to a 2-dimensional plane. To deal with an underdetermined case where sources are distributed arbitrarily, we propose a method that can employ a 2- or 3-dimensional sensor array. Our new method employs the source sparseness assumption to handle an underdetermined case. Our formulation with the sensor coordinate vectors allows us to employ arbitrarily arranged sensors easily. We obtained promising experimental results for 2-dimensionally distributed sensors and sources 3×4, 3×5 (#sensors × #speech sources), and for 3-dimensional case with 4×5 in a room (reverberation time (RT) of 120 ms). We also investigate the DOA estimation performance under several reverberant conditions.

Keywords

Direction of arrival (DOA) Sparseness Clustering Microphone array Anechoic model 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Shoko Araki
    • 1
    Email author
  • Hiroshi Sawada
    • 1
  • Ryo Mukai
    • 1
  • Shoji Makino
    • 2
  1. 1.NTT Communication Science LaboratoriesNTT CorporationKyotoJapan
  2. 2.University of TsukubaTsukubaJapan

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