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

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (9) : 116-119.

论文

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

单颖春; 刘耀光; 刘献栋; 何田

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

Shan Ying-chun; Liu Yao-guang; Liu Xian-dong; He Tian

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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。

Abstract

A method for near-field coherent sound source identification is proposed by combining interpolated array technique with two-dimensional spatial smoothing. First, actual received signals are converted to far-field signals by interpolated array technique. Second, spatially smoothed covariance matrix is calculated through two-dimensional spatial smoothing. Then, the signal power in a giver vector can be obtained, and the location of sound sources can be obtained. Simulation results have show that this method is much more accurate than conventional beamforming on identification of sound source.

Key words

interpolated array technique / two-dimensional spatial smoothing / coherent sound source

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单颖春;刘耀光;刘献栋;何田. 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[J]. 振动与冲击, 2011, 30(9): 116-119

Shan Ying-chun;Liu Yao-guang; Liu Xian-dong; He Tian. Study of near-field coherent sound source identification based on interpolated array technique and two-dimensional spatial smoothing[J]. Journal of Vibration and Shock, 2011, 30(9): 116-119