地磁脉动信号的双谱分析

地磁脉动信号的双谱分析 The Bispectral Analysis in Geomagnetic Micro Pulsation Signal 张浩 ZHANG Hao 1 first-author 赵正予 ZHAO Zheng yu 1 谢树果 XIE Shu guo 1 倪彬彬 NI Bing bing 1 武汉大学电子信息学院,湖北,武汉,430072 武汉大学电子信息学院,湖北,武汉,430072 School of Electronics Information,Wuhan University School of Electronics Information,Wuhan University 根据地磁脉动信号在更多情况下表现为非高斯的随机过程 ,提出采用高阶统计量方法对地磁脉动信号进行分析处理 ,导出基于三阶累积量的双谱间接估计 ,并由此重构得到原随机信号的功率谱和其信号本身 .结合实例说明了 ,双谱分析方法与传统的功率谱分析方法相比较 ,具有不可比拟的优越性 . Based on the fact that the geomagnetic micro pulsation signal behave as a non Gaussian random process in most cases, a signal processing method using higher order statistics is proposed to analyze the geomagnetic micro pulsation signal. Deriving the bispectrum estimated via indirect method, then reconstructing the power spectrum and the signal itself based on it. Results by using an example show that comparing with the other traditional analytical ways, the bispectral analysis method is superior. 高阶统计量 双谱估计 地磁脉动 重构 higher order statistics bispectral estimate geomagnetic pulsation reconstruct P318;TN911 国家自然科学基金资助项目 （ 4 990 40 10 ） 2001-03-01 2021-04-01 3