【作者】 韩晶；

【导师】 王鹏；

【作者基本信息】 中北大学 ， 数学， 2017， 硕士

【摘要】 基于矢量阵列的信号处理原理是将不同的矢量传感器分别放置在水下不同的位置,组成传感器阵列,然后通过这些阵列接收并处理声源发出的信号,提取信号的相关信息及特征,同时抑制相应的噪声及干扰,该方法已被广泛应用于海洋探索及研究领域。本文基于矢量水听器阵列,研究了信号的处理技术及定位方法,主要内容如下:(1)依据声压与粒子速度之间的旋转关系,即声矢量阵的自身特性,本文提出了一种改进的ESPRIT算法,该算法适用于任意形状的阵列。为了验证上述提出的ESPRIT算法新形式的可行性,分别采用5元声矢量均匀线阵(Uniform Linear Array,ULA)和圆阵(Uniform Circle Array,UCA)做实验,并用两个独立信号分别从和方向入射到阵列,实验数据表明UCA的估计性能要优于ULA,在较低信噪比、较小快拍数下能获得更高的成功概率和更小的均方根误差(RMSE)。(2)基于二元矢量阵列的定位原理,分别介绍了球面交汇定位算法和双曲面交汇的定位方法,利用传感器阵列,检测声源目标发出的声音信号,然后计算各传感器所接收信号的时延差,从而获得目标的距离值。实验数据及结果表明,球面交汇定位方法受时间测量误差及时延误差的影响相对较小,在实际应用中更理想一些。更多还原

【Abstract】 The principle of signal processing based on vector array is to place the different vector sensors in different positions underwater to form the sensor array,and then receive and process the signal from the sound source through these arrays,extract the relevant information and characteristics of the signal,and suppress the corresponding noise and interference,the method has been widely used in marine exploration and research areas.Based on the vector hydrophone array,this paper studies the signal processing technology and positioning method,The main contents are as follows:(1)According to the rotation relationship between sound pressure and particle velocity,that is,the self-characteristic of acoustic vector array,this paper presents an improved ESPRIT algorithm formulation,which is suitable for any shape array.In order to verify the feasibility of the proposed new form of ESPRIT algorithm,we use the Uniform Linear Array(ULA)and the circular array(Uniform Circle Array,UCA)to do experiment with two independent signals,respectively with030 and080 direction of the array,the experimental data show that the UCA ’s estimated performance is better than ULA,in the lower signal to noise ratio,the smaller number of fast beat can get a higher probability of success and smaller RMSE.(2)Based on the principle of binary vector array,the localization method of spherical intersection and the intersection of hyperbolic intersection are introduced.The sensor array is used to detect the sound signal from the target of the sound source,and then the delay difference of the signal received by each sensor is calculated.Get the distance value of the target.Experimental data and results show that the method of spherical intersection is less affected by time measurement error and delay error,which is more ideal in practical application.更多还原