【摘要】 矢量水听器可同时拾取声压和振速信息,成阵后水听器间的相移信息量增大。基于矢量水听器阵的波束形成性能明显由于同条件下的声压水听器阵,但其空间分辨力依然受阵列物理空间的限制。已经有人研究了矢量水听器阵的高分辨谱估计方法(MUSIC算法),但属于对阵元域信号进行的直接处理,运算量较大。提出一种基于矢量水听器阵的波束域MUSIC算法(BMUSIC)。该算法首先将矢量水听器阵元的空间数据转换到波束空间,然后对转换后的数据再运用MUSIC算法。不但实现了降维处理,减小了运算量,而且可进一步抑制扫描扇面外的噪声。对BMUSIC算法进行了仿真并与常规MUSIC算法进行了比较。结果表明,该方法可得到与阵元域MUSIC算法相当的方位分辨力。更多还原

【Abstract】 Since the vector sensor can simultaneouly pick up the sound pressure and vibration velocity,the informaation of phase shift among the sensors increases after being formed the array.The conventional beamforrning performance based on vector sensor array is obviously better than the presure sensor array,but its resolution is limited.The Multiple Signal Classification algorithm (MUSIC) has been studied,but it is based on processing the signals from the elements of the array,and hence the computational cost is large.A Beam Domain MUSIC algorithm(BMUSIC) based on the vector sensor array is used.In this algorithm,the spatial data from the elements of the vector sensors array are transfomed to that in the beam space at first,then MUSIC algorithm is used for the transformed data.As a result,the dimension reduced processing is realized and the computational cost is decreased,in addition,the noise outside the scanning sector can be reduced further.The computer simulation has been done for BMUSIC compared with the conventional MUSIC.The results indicate that by using the algorithm proposed in this paper,the obtained resolution is simular to that of coventional MUSIC method.更多还原