一种优化的宽带聚焦波束形成算法

提出了一种基于最佳聚焦频率的旋转信号子空间法来实现宽带信号波束形成.通过确定最佳聚焦频率,使宽带信号的各个子带通过聚焦矩阵都聚焦在最佳聚焦频率上,然后用常规延迟求和波束形成算法完成恒定束宽波束形成.仿真结果表明,在宽带情况下,阵列输出的主波束宽度,旁瓣级和波束指向均能保持恒定.

Optimizational Algorithm of Broadband Focused Beamforming

A broadband signal beamforming using rotational signal subspace method based on optimal focusing frequency is proposed. This method is by determining the optimal focusing frequency, so that each subband of the broadband signal is focused on the optimal focusing frequency by using the focusing matrix, and then the conventional delay - and - sum beamforming algorithm is employed to complete the constant beamwidth beamforming. The simulation results show that, in the case of broadband, all the width of main beam array output, the sidelobe level and the beam pointing can keep in a constant value.