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电子学报  2013 

基于特征向量的多谱线自旋回波串信号参数估计

DOI: 10.3969/j.issn.0372-2112.2013.09.010, PP. 1730-1737

Keywords: 核四极矩共振,自旋回波串,2-D参数估计,特征向量基,子空间转移不变结构

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Abstract:

针对存在加性高斯白噪声多参数变量的多谱线自旋回波串(SpinEchoTrain,SET)信号参数估计问题,提出基于特征向量的2-D参数估计方法.将SET信号构造成2-D数据矩阵,按照不同的方式构造Hankel块矩阵束,利用子空间转移不变结构解得特征向量,依据特征向量的结构规律获得衰减因子和频率,基于最小二乘方法进一步获得信号幅度估计.该方法具有自动配对的能力,在相对高信噪比以及频率可分辨的情况下能够实现参数的有效估计,且计算复杂度较低.仿真数据结果证明了算法的有效性.

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