基于Farrow结构的宽带同时多波束形成方法

提出基于Farrow结构的宽带同时多波束算法。在不更新固定加权端权值的情况下,仅在波束指向控制端进行多组加权,便在通带内实现了同时多波束。所提算法在满足恒定束宽的同时,降低了波束旁瓣。考虑到Farrow阵列结构存在抽头数过多、实现难度大的问题,引入了抽头稀疏优化设计思想,经过稀疏优化之后,Farrow结构的有效阶数减小,降低了工程实现的复杂度。仿真结果验证了所提方法的有效性。

Wideband muti beamforming method based on the Farrow structure

A wideband multi beamforming method based on the Farrow structure is proposed. The multi beamforming is realized via multiple sets of weight in the beam steering module, with no need of redesign of the wideband beamformers. The proposed method improves the beamwidth invariance and reduces the sidelobe of the multi beam. To solve the problem of great implementation of complexity, the sparse design concept is introduced. The taps sparse design decreases the effective order of the Farrow structure and reduces the compexity of realization. Simulation results demonstrate the effectiveness of the proposed method.