| 基于变换域的IMS信号处理方法及其改进 |
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| 引用本文： | 吴俊杰,郑小保,徐威,龙伟.基于变换域的IMS信号处理方法及其改进[J].电波科学学报,2009,24(4). |
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| 作者姓名： | 吴俊杰 郑小保 徐威 龙伟 |
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| 作者单位： | 中国电波传播研究所,山东,青岛,266107 |
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| 摘 要： | 讨论了一种基于变换域的离子迁移谱(IMS)信号处理方法-傅立叶变换离子迁移谱(FT-IMS)技术,通过离子门开关频率的改变实现信号的调制,得到频域的IMS信号.该技术使离子利用率由百分之一提高到了百分之二十五,信噪比(SNR)提高了14 dB以上;通过增加离子门开关频率的范围可以进一步提高分辨率,解决了IMS技术中SNR和分辨率相矛盾的问题.在此基础上,改进了FT-IMS算法,减弱了FT-IMS技术中镜像脉冲的干扰.经对FT-IMS算法和改进算法的数值仿真验证,证明了其有效性.
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| 关 键 词： | 离子迁移谱 傅立叶变换 分辨率 信噪比 |
Fourier transform ion mobility spectrometry and its improvement |
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| WU Jun-jie,ZHENG Xiao-bao,XU Wei,LONG Wei.Fourier transform ion mobility spectrometry and its improvement[J].Chinese Journal of Radio Science,2009,24(4). |
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| Authors: | WU Jun-jie ZHENG Xiao-bao XU Wei LONG Wei |
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| Affiliation: | WU Jun-jie ZHENG Xiao-bao XU Wei LONG Wei (China Research Institute of Radiowave Propagation,Qingdao Sh,ong 266107,China) |
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| Abstract: | Fourier transform ion mobility spectrometry(FT-IMS) is discussed in this paper.The potential of this method,in which 25% of the available ions contribute to the measured signal,is evaluated with respect to sensitivity and resolution.Based on the study and discussion on the FT-IMS technology,an improved algorithm is presented,which has ruduced interference due to minor contributions.Finally,the validities of the method and its improvement are demonstrated from numerical simulation. |
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| Keywords: | ion mobility spectrometry(IMS) Fourier transform resolution signal to noise ratio(SNR) |
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