[1]刘家祥.复正弦波模型在声源方向和功率谱检测中的应用[J].深圳大学学报理工版,1997,14(4):7-13.
 Liu Jiaxiang.An Application of Composite Complex Sinusoidal Modeling to the Estimation of Directions and Power Spectra of Incident Plane Waves[J].Journal of Shenzhen University Science and Engineering,1997,14(4):7-13.
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复正弦波模型在声源方向和功率谱检测中的应用()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第14卷
期数:
1997年4期
页码:
7-13
栏目:
电子与信息科学
出版日期:
1997-12-30

文章信息/Info

Title:
An Application of Composite Complex Sinusoidal Modeling to the Estimation of Directions and Power Spectra of Incident Plane Waves
作者:
刘家祥
深圳大学电子工程系,深圳 518060
Author(s):
Liu Jiaxiang
Dept. of Electronic Engineering Shenzhen University, Shenzhen 518060, P. R. China
分类号:
TN 911.72
摘要:
提出应用复合复数正弦波模型(CCSM)法检测入射声波的方向和功率谱。线阵排列传感器的输出信号经离散傅里叶变换分离成各不相同的的频率成分,由它们可构成空间序列。如果仅存在一i平面波时,序列构成一i空间复数正弦波,当有多个平面波存在时,序列为由这些平面波形成的空间复数正弦波之和。从相应正弦波求得的振幅和相位变化率可以检测平面波的入射方向和功率德当线阵的长度接近于入射波波长时,CCSM法所得到的指向性图没有旁瓣,能很方便地检测出声源的存在及其方向。CCSM法的有效性由计算机模拟得到证实
Abstract:
The Composite Complex Sinusoidal Modeling (CCSM) for the estimation of direction and power spectrum of an incident sound using a linear array of sensors is proposed. Output signals from the sensors in the array are stored in a computer and separated with Discrete Fourier Transform (DFT) into different frequency components, for all of which spatial sequences are generated. If only one plane wave is present, a spatial complex sinusoidal wave is formed by the sequence. Whereas in the case of a plural number of plane waves, the sequence is provided by the sum of the same number of spatial complex sinusoidal waves as the number of the plane waves. Derection and power spectrum of an incident plane wave are estimated by evaluating amplitude and rate of phase change of the corresponding sinusoidal wave. The directivity pattern obtained with CCSM has no side lobe and gives only a single line which indicates the direction and power of the incident plane wave even if the length of the array is the same order as the wave length of the incident plane wave. The effectivness of CCSM is confimed by compute rsimulation.
更新日期/Last Update: 2016-03-15