基于傅里叶系数权函数的宽带波束形成算法

Broadband Beamforming Algorithm Based on Fourier Coefficients Weight

提出了一种基于傅里叶级数系数函数权的宽带恒定束宽波束形成方法。该方法首先确定各个子带中心频率处的波束响应图,继而利用傅里叶系数求取公式分别求得各个子带中心频率处对应的权函数。并通过仿真验证了该方法可实现在信号带宽内基阵波束图主瓣宽度保持恒定,与基于Bessel函数的方法相比,具有更高的运算效率。

A novel wideband beam forming with constant beamwidth method based on Fourier series coefficients weight is proposed. The new approach firstly conforms the beamform response at the frequency center of every subband, and then uses the Fourier series equation to achieve the corresponding weight function at the frequency center for each subband. The simu- lation proves that the approach could realize the beamwidth constant in the signal bandwidth, and has higher operation effi- ciency compared with Bessel function method.