一种螺旋双锥体积阵宽带恒定束宽波束形成方法

A broadband constant beamwidth beamforming method of the spiral biconical volume array

本文提出一种螺旋双锥体积阵宽带恒定束宽波束形成方法。在远场条件下,依据信号源和阵元的位置信息,给出了螺旋双锥体积阵接收信号模型,将阵列响应向量表示成以Bessel函数为核函数的形式。确定参考频率,将宽带划分成多个子带,使得子带内各频率分量上的波束图与参考频率上的波束图一致。本文提出的宽带恒定束宽波束形成方法能有效地运用到螺旋双锥体积阵处理宽带信号中。采用螺旋双锥体积阵接收处理宽带信号,解决了垂直线阵、矢量水听器和平面阵的各种局限,更有利于实现宽频带信号处理。

A wideband constant beamwidth beamforming method of spiral biconical volume array is studied in thispaper. Under the condition of far field, the receiver signal model of the spiral biconical volume array is given according to the location information of the signal source and the array element, and the array response vector is expressed as the Bessel function as the kernel function. The reference frequency is determined and the broadband is divided into several subbands, so that the beam pattern of each frequency component in the subband is consistent with that on the reference frequency. The broadband constant beamwidth beamforming method proposed in this paper can be effectively applied to the wideband signal processing with the spiral biconical volume array. Aspiral biconical volume array is used to receive and process broadband signal, which solves the limitation of vertical linear array, vector hydrophone and planar array, and is more conducive to realize of wideband signal processing.