一种基于矢量水听器阵的归一化加权Capon波束形成方法

A norm-weighted capon beamforming method based on acoustic-vector sensor array

矢量水听器同时拾取声场的标量信息声压和矢量信息振速。本文在分析了各向同性噪声场下矢量水听器阵Capon波束形成方位谱的基础上,提出了一种归一化加权Capon波束形成的改进算法,并给出了方位谱的表达式。本方法不需要特征分解,并且得到的是通常意义上的功率谱(可用于估计信号的能量)。仿真计算表明,此方法的性能优于Capon法,可大大提高方位估计的精度。

An acoustic vector sensor can measure pressure (scalar information) and particle velocity (vector information) at a single point in the sound field. Based on analyzing Capon direction estimation method for acoustic vector sensor arrays, a norm-weighted Capon method for direction estimation is proposed in this paper, and the direction spectrum is given. In this method, eigen-decomposition does not have to be used, and the direction spectrum is the power spectrum in common sense (It can be used to estimate signal power). The computer simulation results indicate that the performance of the algorithm proposed in this paper is better than that of the Capon direction estimation method, in which the direction estimation accuracy is obviously improved.