摘要
针对超宽带通信信号,提出了一种新的二阶段欠定盲源分离方法:阶梯图-最小角度法。在第一阶段即混叠矩阵估计阶段,提出用阶梯图对均匀抽样的数据点进行聚类计算,建立了一种估计混合矩阵的工程化模型,它可以直接估计出源信号个数,并且得到精度较高的混合矩阵估计值;在第二阶段借助最小角度分离准则估计出源信号,从而获得较好的分离性能。
A novel two-stage method of underdetermined blind source separation named ladder diagram-minimum angle is proposed for the ultra-wideband communications signals.In the first stage,where the mixing matrix is estimated,cluster calculation is performed on the uniform sampling of data points by using ladder diagram,thus a engineering model for estimating the mixing matrix has been established,which is used to directly estimate the number of source signals and get high precision estimates of the mixing matrix.In the second stage,the source signal is estimated by using the minimum angle separation criterion and the better separation performance is thereby obtained.
出处
《南京邮电大学学报(自然科学版)》
2011年第1期23-28,共6页
Journal of Nanjing University of Posts and Telecommunications:Natural Science Edition
关键词
超宽带通信信号
欠定盲源分离
稀疏分量分析
阶梯图
最小角度
ultra-wideband communication signals
underdetermined blind source separation
sparse component analysis
ladder diagram
minimum angle