改进型圆面阵的快速波束形成算法设计

为降低基于圆面阵的三维成像声纳波束形成算法的运算量，提出改进圆面阵布阵阵型设计及优化波束方位的方法。改进型圆面阵由多条通过圆心的线阵组成，其波束形成等效于所有线阵波束形成结果的叠加；通过对波束方位进行优化，使得每一条线阵的波束形成过程等效为等长度的一维快速傅里叶变换运算。仿真结果表明，改进型圆面阵的波束形成运算量较直接计算显著降低。运用改进型圆面阵可显著降低三维成像声纳信号处理系统的复杂度,提高了声纳的综合性能。

Design of Fast Beam Forming of Improved Circular Planar Array

In order to reduce the computational complexity of beam forming of 3D imaging sonar based on circular planar array,a method of improving the array design and optimizing the beam azimuth is proposed.The improved circular array consists of a plurality of linear arrays passing through the center,and the beam forming is equivalent to the superposition of the beam forming of all the linear arrays.By optimizing the beam azimuth,the beam forming process of each linear array is equivalent to a one-dimensional fast Fourier transform operation of equal length.The simulated results show that the beam forming computation of the improved circular array is significantly lower than that of the direct calculation.The use of improved circular array can significantly reduce the complexity of the signal processing system and improve the comprehensive performance of 3D imaging sonar.