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

这项研究的目标是利用几何对称的传感器排列来开发一种新型的阵列信号处理框架。1)获得了几乎所有可能的传感器几何形状。2)提出了对扩散噪声具有鲁棒性的多源定位算法：Crystal-MUSIC算法。3)提出了混响环境下基于多通道滤波的扩散噪声抑制算法。4)提出了噪声环境下冲激响应的盲估计算法，并验证了其基本有效性。5)推广了对称性的概念，将扩散噪声抑制算法扩展到适用于任意传感器几何形状。

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.