基于插值矩阵技术与二维空间平滑法的近场相干声源识别研究

在研究插值矩阵技术与二维空间平滑法两种方法的基础上,将两者进行结合,提出了一种对近场相干声源进行识别的方法。首先通过插值矩阵技术把实际阵列接收到的近场信号转换为形式上的远场信号,然后通过二维空间平滑法求出阵列的平滑协方差矩阵,再由平滑协方差矩阵得到给定方向向量对应的信号功率,实现二维相干声源的识别。算例表明,该方法比传统的波束形成能更准确地定位出声源的位置。

Study on near-field coherent sound source identification based on interpolated array technique and two-dimensional spatial smoothing

A method for near-field coherent sound source identification was proposed by combining interpolated array technique with two-dimensional spatial smoothing.Actually received signals were converted to far-field signals by interpolated array technique,and spatially smoothed covariance matrix was calculated through two-dimensional spatial smoothing.Then,the signal power in the vector of given direction can be obtained to identify the location of sound sources.Simulation results show that the method is much more...