逆波束形成在圆阵中的应用

Inverse beamfoming applied to circle array

本文讨论将逆波束形成算法应用于圆阵,给出了圆阵FIM(Fourier Intergral Method)积分方程的近似解,并通过滑动平均进一步改善了逆波束形成算法。仿真结果表明:本文所采用的逆波束形成算法旁瓣比常规波束形成算法低4dB,空间方位分辨力提高约1/3．算法的性能通过海试数据处理得到了进一步验证。

The inverse-beamforming method is applied in circle array in this paper, the approximate solutions of the FIM （Fourier Integral Method） integral equation is given and the beamforming algorithm is improved by use of the moving average. From simulation： the side lobe is 4dB lower than that of the conventional beamforming and the space resolution is raised by about 1/3. The performance of algorithm is confirmed through treating the data of a sea experiment.