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DOA Estimation for Multiple Sparse Sources with Arbitrarily Arranged Multiple Sensors

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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.

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Authors and Affiliations

  1. NTT Communication Science Laboratories, NTT Corporation, 2-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto, 619-0237, Japan

    Shoko Araki, Hiroshi Sawada & Ryo Mukai

  2. University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan

    Shoji Makino

Authors
  1. Shoko Araki
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  2. Hiroshi Sawada
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  3. Ryo Mukai
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  4. Shoji Makino
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Correspondence to Shoko Araki.

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Araki, S., Sawada, H., Mukai, R. et al. DOA Estimation for Multiple Sparse Sources with Arbitrarily Arranged Multiple Sensors. J Sign Process Syst 63, 265–275 (2011). https://doi.org/10.1007/s11265-009-0413-9

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  • DOI: https://doi.org/10.1007/s11265-009-0413-9

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