对低信噪比非稳定信号的参数估计MESPRIT

波谱学杂志 ›› 1998, Vol. 15 ›› Issue (1): 57-64.

对低信噪比非稳定信号的参数估计MESPRIT

王成发, 黄永仁

华东师范大学分析测试中心, 上海 200062

收稿日期:1997-08-09 出版日期:1998-02-05 发布日期:2018-01-13
作者简介:王成发,男,29岁,博士生,讲师
基金资助:
国家自然科学基金与国家教委博士点基金资助项目

MESPRIT: A NEW ALGORITHM OF ESTIMATING PARAMETERS FOR UNSTABLE SIGNALS WITH LOW SIGNAL-TO-NOISE RATIO

Wang Chengfa, Huang Yongren

Analytical Center NMR Lab, East China Normal University, Shanghai, 200062

Received:1997-08-09 Online:1998-02-05 Published:2018-01-13

摘要/Abstract

摘要： 对振幅衰减和信噪比极低的信号进行参数估计,最常用的傅氏变换以及大多数现代信号参数估计方法(如,最大熵法MEM、线性预测奇异分解法LPSVD等),其结果都不能令人满意.本文针对信号衰减、信噪比极低的特点,改进了基于旋转不变技术的信号参数的估计方法(MESPRIT),并给出几种估计方法的对比仿真结果.

关键词: 衰减信号, 信噪比, 旋转不变技术, 定阶

Abstract: For signals which have the damped amplitude and very low signal-to-noise ratio, the most commonly used methods to estimate parameters are FT, MEM, LPSVD and so on.The results yielded, however, are not satisfactory.Taking the features of the signals into consideration, this paper provides an algorithm modified according to ESPRIT (estimation of signal parameters via rotational invariance techniques)and better results are obtained. A comparison of simulated results with several estimation methods is also given.

Key words: Damped Signals, SNR, Rotational Invariance Techniques, Order Selection

王成发, 黄永仁. 对低信噪比非稳定信号的参数估计MESPRIT[J]. 波谱学杂志, 1998, 15(1): 57-64.

Wang Chengfa, Huang Yongren. MESPRIT: A NEW ALGORITHM OF ESTIMATING PARAMETERS FOR UNSTABLE SIGNALS WITH LOW SIGNAL-TO-NOISE RATIO[J]. Chinese Journal of Magnetic Resonance, 1998, 15(1): 57-64.

[1]	孙宏宇1，汤伟男2，王为民1*. 利用动态接收增益提高磁共振成像信噪比的方法[J]. 波谱学杂志, 2014, 31(4): 515-522.
[2]	张正炎，屈小波，林雁勤*，陈忠. 基于近似l₀范数最小化的NMR波谱稀疏重建算法[J]. 波谱学杂志, 2013, 30(4): 528-540.
[3]	郝凤龙*，徐更光，黄学义. NQR炸药探测系统中射频线圈的设计研究[J]. 波谱学杂志, 2013, 30(4): 552-558.
[4]	乔立华，王文韬，许跃，王为民*. 一种可拆装式的脑外科手术用磁共振成像线圈[J]. 波谱学杂志, 2013, 30(1): 21-28.
[5]	祁峰; 赵峰; 王芳; 康松柏; 梅刚华. 铷原子频标鉴频信号信噪比相关问题分析[J]. 波谱学杂志, 2009, 26(3): 369-374.