Fundamental Study on Array Signal Processing Using Cristal-shaped Sensor Array

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The goal of this study is to develop a novel array signal processing framework exploiting the geometrically-symmetric sensor arrangements. The achievements are summarized as follows.1) Almost all possible sensor geometries have been obtained.2) The multiple source localization algorithm robust to diffuse noise : Crystal-MUSIC has been formulated.3) The diffuse noise suppression algorithm under reverberant environment using multi-channel filter has been developed.4) The blind estimation method of impulse response under noisy environment has been developed and its fundamental effectiveness has been confirmed.5) Generalizing the concept of symmetry, the diffuse noise suppression algorithm has been expanded to be applicable for any arbitrary sensor geometry.