基于空域信息的稳健的宽带波束形成算法

Robust Broadband Beamforming with Spatial-Only Information

研究宽带信号优化问题,空域信息的宽带波束形成技术与传统的时域方法相比,结构物理实现简单。在实际系统中,广泛存在着阵元幅相差,造成基于空域信息的宽带波束形成性能的下降,甚至恶化,针对上述问题,提出了一种采用空域信息的稳健的宽带波束形成算法,可用信号的恒模特性,通过对波束形成器的输出做非线性变换,得到参考信号,然后求取合适的初始权值并通过迭代收敛至期望的权值。仿真结果验证了算法提高了宽带性能的有效性。

Broadband beamforming with spatial - only information is a novel broadband beamforming structure, and its realization is simple compared with the traditional broadband beamforming. In the practical systems, the broadband beamformer with spatial - only information suffers performance degradation because of the array amplitude and phase errors. A robust broadband beamforming with spatial - only information was proposed, which obtained the reference signal by nonlinear transformation, utilized the constant modulus property of the received signal, and itera- ted until the weight converged at the optimal solution after evaluate the appropriate initial weights. The computer sim- ulation results demonstrate its validity and superiority .