说明：  欠定盲源分离是典型的信号处理问题，最早起源于鸡尾酒问题，目前作为一类具有挑战性数学问题，本文给出了混合矩阵的一种估计方法的matlab
(Underdetermined blind source separation is a typical signal processing problem, which originated from cocktail problem. At present, as a kind of challenging mathematical problem, this paper presents a matlab estimation method of mixed matrix)