一种基于三阶累量的空间谱估计的方法

A Method for Estimating Spatial Spectraon the Basis of Thirdorder Cumulant

针对有色高斯噪声背景相干信号源空间谱估计中存在的问题，给出一种基于三阶累量的空间谱估计的方法：首先根据三阶累量对高斯型过程不敏感这一事实，抑制高斯有色噪声，然后利用空间差分平滑方法估计相干源的空间谱，最后给出模拟实验验证该方法的有效性．

The estimation of the spatial spectra of coherent sources in colored Gaussian noises is still an open problem. A method on the basis of thirdorder cumulant is presented: first, the noises are removed according to the fact that thirdorder cumulant is not sensitive to Gaussian processes, then,the spatial differencingsmoothing method is employed to estimate the spatial spectra of coherent sources. The results of the simulations given at the end of the paper prove the effectiveness of this method.