作　　者： ; ;

机构地区： 华中科技大学

出　　处： 《中国机械工程》 2007年第19期2298-2302,共5页

摘　　要： 传统源数估计方法要求传感器数大于或等于源数,而盲信号很难满足这个条件,为此,提出了一种新的源数估计方法。该方法在传感器数与源数关系不明确的情况下,仅根据观测信号的功率谱密度函数的比值即可对源数作出估计。通过理论分析、仿真和实验,证明了该方法的有效性。 The convetional methods for estimating the number of sources require that the number of sensors must be more than or equal to the number of the sources, and this is very difficult to satisfy for ＂blind＂ sources. A new method for estimating the number of sources was presented according to the ratio of power spectral density （PSD） of the observation signals when the relation between the number of sensors and sources was unknown. The effectivity of the proposed method was verified by theoretical analysis, simulation and experimental data.

关 键 词： 盲信号 源数估计 功率谱密度函数 盲源分离

领　　域： [电子电信] [电子电信]