频域宽带波束形成器设计

Frequency-Domain Broadband Beamformer Design

研究无线网络传感器,采用宽带信号波束技术,为了使宽带信号在整个频段内保持稳健的波束,以及克服快拍数有限对空间谱估计带来的不利影响,采用频域波束形成算法形成宽带波束,利用对角加载技术补偿所估计的空间谱,并通过矩阵求逆定理推导出对角加载值的取值范围。最后的仿真结果表明通过选择合适的对角加载值可以克服快拍数目不足带来的影响,从而实现具有较高阵列增益的稳健宽带波束,有效地完成对信号的空域处理,提高了传输性能。

In order to achieve broadband beamforming here, we use the frequency-domain beamforming algorithm to achieve broadband beamforming. And diagonal loading is adopted to compensate the spatial spectral matrix which is badly affected by the finite numbers of snapshot. Then the range of diagonal loading values is given according to the matrix inversion theorem. Results of computer simulations verify that robust broadband beam with high array gain can be achieved if orooer diagonal loading value and snaoshot numbers are ehoosen.