东南大学学报（英文版）2016，Vol.32Issue(2)：135-140,6.DOI:10.3969/j.issn.1003-7985.2016.02.001
一种基于频域的欠定瞬时混合2步盲分离法
A two-stage frequency-domain blind source separation method for underdetermined instantaneous mixtures
摘要
Abstract
In order to decrease the probability of missing some data points or noises being added in the inverse truncated mixing matrix ( ITMM ) algorithm, a two-stage frequency-domain method is proposed for blind source separation of underdetermined instantaneous mixtures. The separation process is decomposed into two steps of ITMM and matrix completion in the view that there are many soft-sparse ( not very sparse) sources. First, the mixing matrix is estimated and the sources are recovered by the traditional ITMM algorithm in the frequency domain. Then, in order to retrieve the missing data and remove noises, the matrix completion technique is applied to each preliminary estimated source by the traditional ITMM algorithm in the frequency domain. Simulations show that, compared with the traditional ITMM algorithms, the proposed two-stage algorithm has better separation performances. In addition, the time consumption problem is considered. The proposed algorithm outperforms the traditional ITMM algorithm at a cost of no more than one-fourth extra time consumption.关键词
截断混合矩阵求逆/欠定盲源分离/频域/矩阵填充Key words
inverse truncated mixing matrix/under-determined blind source separation ( UBSS )/frequency domain/matrix completion分类
信息技术与安全科学引用本文复制引用
彭天亮,陈阳..一种基于频域的欠定瞬时混合2步盲分离法[J].东南大学学报（英文版）,2016,32(2):135-140,6.基金项目
The National Natural Science Foundation of China ( No.60872074) （ No.60872074）
