用MUSIC法确定声源频率和方位时误差的校正方法

为确定多个平面波窄带声源的频率和方位本文在阵列信号处理理论的基础上，提出用均匀线阵接收信号数据，并采用多信号分类法（ＭＵＳＩＣ法）对其进行频率，方位参数的分离估计，利用其正交性的谱估计来判断声源的频率和方位，在此基础地实际阵列中存在的阵元位置扰动，通道特性不一致和阵元之间的耦合这三种模型误差，提出了一种基于辅助源的校正方法，并得模型误差不影响声源的频率，只影响声源方位的判断，声学实验证实，通过校正

A Calibration Method of Model Error for Frequencies and Bearings Estimation of Sources with MUSIC

Based on the theory of array signal processing, a separable approach with a method of multiple signal classification (MUSIC) and orthogonality of spectrum is proposed to estimate frequencies and azimuth angles of multiple planar wavefront noise sources with narrow band using a uniform linear array. Based on it, a method of model error calibration by additional source is proposed to reduce the three kinds of model errors in a practice, and model errors have not influence on frequencies but influence on azimuth angles. The theory in the paper is verified by acoustics experiments in anechoic room. Theexperimental results show that the method has high resolution. It shows that the method is effective.