摘要
本文提出了一种新的欠定盲源分离中源信号个数的估计算法,利用稀疏混合信号的特征,引入拉普拉斯势函数,并采用聚类算法来估计其局部最大值,由此得到源信号的个数估计。所提出的算法具有较好的抗噪声性能,对信号的稀疏度要求低。仿真实验结果说明了该算法的有效性。
In this paper, a new method is proposed to estimate the number of the sources for underdetermined blind sources separation (UBSS). Based on the sparse mixture models, the Lapulacial potential function is introduced, and then the number of sources can be obtained by estimating the local maxim of the potential function. In order to increase the robustness to the noise and the sparsity of the sources, the clustering algorithm is exploited to estimate the local maxim of the potential function instead of directly estimating the local maxim of the potential function. The simulation results show the validity of the algorithm.
出处
《信号处理》
CSCD
北大核心
2009年第11期1719-1725,共7页
Journal of Signal Processing
基金
高等学校博士学科点专项科研基金(20060280003)
国家自然科学基金(60872114)
上海市教委科研创新重点项目(09ZZ89)
上海市重点学科和科委重点实验室项目资助(S30108
08DZ2231100)
关键词
欠定盲分离
源数的估计
稀疏法
势函数
underdetermined blind sources separation
estimation of the number of the sources
sparse component analysis
potential function