摘要
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。
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 accurate than the conventional beamforming approach for identification of sound sources.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第9期116-119,共4页
Journal of Vibration and Shock
基金
国家自然科学基金资助(50875010)
关键词
插值矩阵技术
二维空间平滑法
相干声源
interpolated array technique
two-dimensional spatial smoothing
coherent sound source