基于四阶累积量状态空间模型的间谐波参数估计

Parameter Estimation of Inter-Harmonics Based on Fourth-Order Cumulant State Space Model

推导了间谐波的四阶累积量的对角切片,包含了准确的间谐波频率、幅度及相移信息。在四阶累积量的基础上,提出了一种基于状态空间模型的谐波参数估计方法,该方法实现了间谐波频率、幅度和相位的联合估计。仿真结果表明,所提方法能有效地抑制高斯色噪声,具有优越的参数估计性能。

The diagonal slice of fourth-order harmonics cumulant of inter-harmonics is derived,containing an accurate frequency,amplitude,phase shift and other information.A method of parameter estimation using state space model based on the fourth-order cumulant is proposed.It can achieve inter-harmonics frequency,amplitude and phase of the joint estimation.Simulation results show that the method can effectively restrain Gaussian color noise with superior performance.