零均值独立噪声背景下的二维谐波估计方法  

Two Dimensional Harmonics Estimationg in Zero-Mean Independent Noises

作　　者：刘西成[1] 张政伟[2] 邱红兵[1] 孙晓玲[1] 

机构地区：[1]西南石油大学电子信息工程学院,四川成都610500 [2]中国电子科技集团公司第二十八研究所,江苏南京210007

出　　处：《计算机仿真》2011年第2期154-156,392,共4页Computer Simulation

基　　金：西南石油大学校级科技基金(2007XJZ106)

摘　　要：关于信号频谱特性研究,为了提高有用信号的平稳性和精确的结果,通过定义一种特殊的四阶矩谱,提出了一种新的二维谐波频率估计方法,方法对噪声的分布和颜色无需作任何限制,而且表现出更好的计算有效性。作为一个副产品,还可以直接从频谱中估计出噪声的方差。进行仿真,结果表明能得到平稳和精确的结果,证明方法对零均值独立乘性与加性噪声背景下的二维谐波估计问题是非常有效的。A novel approach of estimating the frequencies of two dimensional harmonics is developed,which relies on fourth-order special cumulant or moment slices.It imposes no constraints on the distribution or the color of noises,and it is shown to have computational advantages over existing method.As a byproduct,the variance of the noises can also be estimated directly from the spectrum.Finally we give as an illustrative example a complete experiment to corroborate the theoretical results.The results of this experiment show preliminarily that the new method is valid and efficient for the problem of harmonics estimation in zero-mean independent multiplicative and additive noises.

关 键 词：谐波估计 乘性与加性噪声 循环统计 特殊四阶矩谱 

分 类 号：TN911.23[电子电信—通信与信息系统]