矢量圆阵测向方法

Direction-of-arrival estimation for a circular vector-sensor array

为了实现矢量传感器在圆阵阵型条件下的应用,研究了均匀矢量圆阵的测向方法.利用声场分解理论将接收声场分解为一系列相互正交的相位模态,给出了声压、径向振速和切向振速的预处理矩阵的生成方法,利用预处理矩阵将矢量圆阵阵元域信号变换到相位模态域,在相位模态域提出了一种矢量圆阵测向方法,实现了声压振速的相干信号处理.仿真和试验结果表明,本方法可以将矢量传感器的抗噪能力与阵列系统的分辨能力有机结合起来,获得比相同阵型的声压阵更好的检测和估计性能.

An exploration in the study of direction-of-arrival （DOA） and an estimation of a uniform circular acoustic vector-sensor array （UCAVSA） were reviewed for continued studies on the acoustic vector-sensor （AVS） in the manifold of uniform circular array. The sound field of receiver has been decomposed into an orthogonal set of phase modals based on the implementation sound pressure, radial and tangential from the method of sound field decomposition. Construct a pretreatment matrix of vibration speeds and particle velocity field, and use it to transform the signal from circular vector-sensor array dement domain to phase modal domain. In phase modal domain a DOA estimation method for a Circular Vector-Sensor Array is proposed. Simulation and experimental results indicate the UCAVSA can combine the anti-noise performance of the vector-sensor with spatial resolution performance of array system through the modal vector-sensor army signal processing algorithms. The results also indicate the UCAVSA has distinct advantages over the same manifold of traditional uniform circular pressure-sensor array （UCPSA） in modal space.