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

电子学报 ›› 2013, Vol. 41 ›› Issue (9): 1730-1737.DOI: 10.3969/j.issn.0372-2112.2013.09.010

基于特征向量的多谱线自旋回波串信号参数估计

朱凯然, 何学辉, 靳标, 朱文涛, 苏涛

西安电子科技大学雷达信号处理国防科技重点实验室, 陕西西安 710071

收稿日期:2012-05-29 修回日期:2012-07-30 出版日期:2013-09-25
- 作者简介:
- 朱凯然 男,1982年8月出生于山东省临沂市.博士研究生.主要研究方向为基于核四极矩共振(Nuclear Quadrupole Resonance,NQR)技术的爆炸物探测系统研制,NQR信号处理,微弱信号参数估计与检测,雷达信号处理,阵列信号处理. E-mail:kairanzhu.kevin@gmail.com;何学辉 男,1979年1月生于江西省吉安市.西安电子科技大学副教授,硕士生导师,研究方向为NQR信号处理,信号波形优化设计,阵列信号处理及实时信号处理. E-mail:xhhe@mail.xidian.edu.cn;靳标 男,1986年9月出生于山西省临汾市.博士研究生.主要研究方向为认知雷达目标跟踪检测. E-mail:jinpuresky@163.com;朱文涛 男,1985年10月出生于山东省临沂市.博士研究生.主要研究方向为雷达信号处理. E-mail:zwt-8061414@163.com;苏涛 男,1968年生于陕西省西安市.现为西安电子科技大学教授、博士生导师.主要从事面向雷达、声纳、通信的高速实时信号处理,信号处理快速算法研究,并行处理系统设计,DSP原理与设计,FPGA中的IP设计以及PowerPC应用. E-mail:sutao@xidian.edu.cn
- 基金资助:
- 国家自然科学基金青年科学基金 (No.61001204)

Parameter Estimation of Multi-Spectrum Spin Echo Train Signal Based on Eigenvector

ZHU Kai-ran, HE Xue-hui, JIN Biao, ZHU Wen-tao, SU Tao

National Laboratory of Radar Signal Processing, Xidian University, Xi'an, Shaanxi 710071, China

Received:2012-05-29 Revised:2012-07-30 Online:2013-09-25 Published:2013-09-25
- Supported by:
- Youth Fund of National Natural Science Foundation of China (No.61001204)

摘要/Abstract

摘要： 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(Spin Echo Train,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.

关键词: 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

Abstract: In allusion to multi-parameter estimation of multi-spectrum spin echo train (SET) signal in the presence of additive white Gaussian noise,a two-dimensional (2-D) parameter estimation method based on eigenvector is proposed.Using SET signal to construct a 2-D data matrix,and according to the different manner to form Hankel block matrix pencil,the eigenvector is resolved by utilizing the shift-invariance structure of the signal subspace,and then,the damping factor and frequency are estimated according to the structure rule of the eigenvector.The complex amplitude of SET is then obtained on the basis of standard least squares.The method has the capability of auto association.Under relatively large signal-to-noise ratio (SNR) and available frequency resolution conditions,it can estimate the parameters effectively,and has an attractive computation complexity.Simulation results show the effectiveness of the proposed algorithm.

Key words: nuclear quadrupole resonance (NQR), spin echo train (SET), two-dimensional parameter estimation, eigenvector-based, shift-invariance structure of the signal subspace

中图分类号:

TN911.7

朱凯然, 何学辉, 靳标, 等. 基于特征向量的多谱线自旋回波串信号参数估计[J]. 电子学报, 2013, 41(9): 1730-1737.

ZHU Kai-ran, HE Xue-hui, JIN Biao, et al. Parameter Estimation of Multi-Spectrum Spin Echo Train Signal Based on Eigenvector[J]. Acta Electronica Sinica, 2013, 41(9): 1730-1737.

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基于特征向量的多谱线自旋回波串信号参数估计

Parameter Estimation of Multi-Spectrum Spin Echo Train Signal Based on Eigenvector

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