互高阶累积量对离散系统辨识的应用原理

采用互高阶累积量（互四阶累积量）的一维对角切片为统计量，证明了互高阶累积量可以有效地抑制非相关噪声和高斯噪声，并在建立互高阶累积量的Ｙｕｌｅ－Ｗａｌｋｅｒ方程的基础上，对离散系统（ＡＲ过程）的结构进行了分析。结果表明，该方法具有良好的谱估计的分辨率和谱估计的稳定性。与其它方法比较，该方法抗干扰性更强，其信噪比工作辩 限更低，有很好的应用前景。

A approaches based on cross-high-order spectrum to identify the digital system

The modern cross high order cumulant(CHOC),such as the cross fourth order cumulant(OFOC),is used to identify the digital system and prove that the CHOC(CFOC)can control the relevant noises and gaussian noises,and based on the cross high order spectral(CHOS)Yule Walker equations,this method can efficiently distinguish the signal buried in the colored noises and have excellent robustness compare with others so that these methods are very suitable to be applied in project.