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Analysis of SNR for Acoustic Vector Sensor Linear Array in Volume and Surface-generated Noise Fields 被引量:3
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作者 于盛齐 黄益旺 焦伟奇 《Journal of Marine Science and Application》 2011年第1期98-104,共7页
Acoustic vector sensor consists of pressure and particle velocity sensors,which measure the three-dimensional acoustic particle velocity,as well as the pressure at one location at the same time.By preserving the ampli... Acoustic vector sensor consists of pressure and particle velocity sensors,which measure the three-dimensional acoustic particle velocity,as well as the pressure at one location at the same time.By preserving the amplitude and phase information of the pressure and particle velocity,they possess a number of advantages over traditional scalar sensors.Signal-to-noise ratio (SNR) gain (which is often called array gain) is one of such advantages and is always interested by all of us.But it is not unchangeable if the spatial correlation of the noise field varies.Much more important,it is difficult to be given if the noise becomes complex.In this paper,spatial correlation of the vector field of isotropic volume-noise and surface-generated noise has been introduced briefly.Based on the results,the combined SNR output of a vector linear array is investigated and the maximum gain is given in the specified noise.Computer simulation shows that the output of one array in the same noise is not the same in different gestures.And then we find the best gesture through SNR calculation and obtain the biggest gain,which has important meaning to guide how to deploy an array in practice.We also should use the array with respect to the characteristics of the real ambient noise,especially in anisotropic noise field. 展开更多
关键词 signal-to-noise ratio spatial correlation acoustic vector sensor linear array volume-noise model surface-generated noise model
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Array gain for a conformal acoustic vector sensor array:An experimental study 被引量:2
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作者 汪勇 杨益新 +3 位作者 何正耀 雷波 孙超 马远良 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第12期126-131,共6页
An acoustic vector sensor can measure the components of particle velocity and the acoustic pressure at the same point simultaneously, which provides a larger array gain against the ambient noise and a higher angular r... An acoustic vector sensor can measure the components of particle velocity and the acoustic pressure at the same point simultaneously, which provides a larger array gain against the ambient noise and a higher angular resolution than the omnidirectional pressure sensor. This paper presents an experimental study of array gain for a conformal acoustic vector sensor array in a practical environment. First, the manifold vector is calculated using the real measured data so that the effects of array mismatches can be minimized. Second, an optimal beamformer with a specific spatial response on the basis of the stable directivity of the ambient noise is designed, which can effectively suppress the ambient noise. Experimental results show that this beamformer for the conformal acoustic vector sensor array provides good signal-to- noise ratio enhancement and is more advantageous than the delay-and-sum and minimum variance distortionless response beamformers. 展开更多
关键词 conformal array acoustic vector sensor array gain optimal beamforming
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Direction-of-arrival estimation for a uniform circular acoustic vector-sensor array mounted around a cylindrical baffle 被引量:5
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作者 YANG DeSen ZHU ZhongRui 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第12期2338-2346,共9页
This work investigates the direction-of-arrival(DOA) estimation for a uniform circular acoustic Vector-Sensor Array(UCAVSA) mounted around a cylindrical baffle.The total pressure field and the total particle velocity ... This work investigates the direction-of-arrival(DOA) estimation for a uniform circular acoustic Vector-Sensor Array(UCAVSA) mounted around a cylindrical baffle.The total pressure field and the total particle velocity field near the surface of the cylindrical baffle are analyzed theoretically by applying the method of spatial Fourier transform.Then the so-called modal vector-sensor array signal processing algorithm,which is based on the decomposed wavefield representations,for the UCAVSA mounted around the cylindrical baffle is proposed.Simulation and experimental results show that the UCAVSA mounted around the cylindrical baffle has distinct advantages over the same manifold of traditional uniform circular pressure-sensor array(UCPSA).It is pointed out that the acoustic Vector-Sensor(AVS) could be used under the condition of the cylindrical baffle and that the UCAVSA mounted around the cylindrical baffle could also combine the anti-noise performance of the AVS with spatial resolution performance of array system by means of modal vector-sensor array signal processing algorithms. 展开更多
关键词 acoustic vector sensor cylindrical baffle modal vector-sensor array signal processing algorithm
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A subspace fitting algorithm of acoustic vector sensor array and corresponding matrix pre-filter design 被引量:1
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作者 WANG Yan WU Wenfeng +1 位作者 FAN Zhan LIANG Guolong 《Chinese Journal of Acoustics》 2014年第3期267-278,共12页
In order to ease the pass-band response distortion of the matrix pre-filter,a simple approach for designing matrix spatial filter is proposed,which minimizes the sum of the k maximal distortion norm(k is the number o... In order to ease the pass-band response distortion of the matrix pre-filter,a simple approach for designing matrix spatial filter is proposed,which minimizes the sum of the k maximal distortion norm(k is the number of the constraint points)within the pass-band,while constraining the filter response within the stop-band.Considering the costly amount of calculation of the high-resolution methods,an algorithm with small amount of calculation based on matrix pre-filtering and subspace fitting using acoustic vector array(MF-VSSF)is proposed.Through joint processing of signal subspace of both pressure and particle velocity,the pre-filtering matrix and the signal subspace is decreased to M-dimensional(M is the number of array-element),hence reduces the time-consumption of the matrix pre-filter design and DOA searching.Simulation results show that,the method offers the same performance as MUSIC with pre-filtering,but has much lesser amount of calculation.Moreover,the designed prefilter can efficiently suppress the interference in the stop-band and improve the estimation and resolution performance of successive DOA estimators. 展开更多
关键词 MUSIC A subspace fitting algorithm of acoustic vector sensor array and corresponding matrix pre-filter design
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拖曳线列阵声呐及其左右舷分辨方法概述 被引量:21
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作者 何心怡 张春华 李启虎 《舰船科学技术》 北大核心 2006年第5期9-14,共6页
概述了拖曳线列阵声呐的发展概况,重点总结了国内外拖曳线列阵声呐左右舷分辨方法的发展情况,包括传统单根线列阵左右舷分辨方法、三元水听器组左右舷分辨方法、双线阵左右舷分辨方法和矢量水听器线列阵左右舷分辨方法等。本文对于拖曳... 概述了拖曳线列阵声呐的发展概况,重点总结了国内外拖曳线列阵声呐左右舷分辨方法的发展情况,包括传统单根线列阵左右舷分辨方法、三元水听器组左右舷分辨方法、双线阵左右舷分辨方法和矢量水听器线列阵左右舷分辨方法等。本文对于拖曳线列阵声呐的相关研究具有一定的参考价值。 展开更多
关键词 拖曳线列阵声呐 左右舷分辨 传统单根线列阵 三元水听器组 双线阵 矢量水听器线列阵
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