瞬时混合盲源分离和最优波束形成的关系研究

摘要

最优波束形成和盲源分离是近几十年迅速发展起来的两种重要阵列信号处理方法,在瞬时混合情况下它们具有相似的信号模型,所以本文研究了二者之间的关系.指出,当不存在噪声时,多数盲源分离算法构造的是最优波束形成:当存在噪声时,可以利用盲源分离算法估计的信号导向向量设计最优波束形成.计算机仿真实验验证了这一结论.%Optimum beamforming and blind source separation as two important methods of array signal processing have been studied for recent several decades.Based on the fact that they have similar arithmetic model in the case of instantaneous mixture of sources, the relationships between them are researched in this paper.It is shown that, when it is absent of noises, most algorithms for blind source separation provide optimum beamforming which can be achieved in the case of noisy mixtures by means of signal steering vector estimated by those algorithms.Finally, simulation results demonstrate these conclusions.