【摘要】 针对二维三次非线性相位耦合问题,定义了特殊四阶累积量及相应的四阶累积量切片谱,并利用四阶累积量切片谱方法对二维三次非线性相位耦合进行了分析。利用复数信号的四阶累积量有24种定义方式这一特点,分别利用两种特殊的四阶累积量的定义。该方法有效地估计出高斯噪声背景下的参与二维三次非线性相位耦合的谐波频率和耦合产生的谐波频率。从而识别出系统的非线性。仿真实验验证了该算法的有效性。更多还原

【Abstract】 For the problem of two dimensional cubic nonlinear phase coupling estimation, special four order cumulant and corresponding slice spectum of four order cumulant are defined. The slice spectum of four order cumulant approach is proposed for estimating two dimensional cubic nonlinear phase coupling. As the four order cumulant of a complex process has different definitions, two definitions are used to extract the coupled and coupling frequency components in Gaussian noise respectively. Hence the system nonlinearity is detected effectively. Simulation examples are presented to prove the results of this paper.更多还原