| 数字正交检测与过采样技术的结合 |
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| 引用本文： | 李鲠颖,蒋瑜,宴小龙.数字正交检测与过采样技术的结合[J].波谱学杂志,2000,17(1):73-78. |
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| 作者姓名： | 李鲠颖 蒋瑜 宴小龙 |
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| 作者单位： | 华东师范大学分析测试中心, 上海 200062 |
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| 基金项目： | 国家自然科学基金!( 1 9775 0 1 5 )，霍英东基金资助项目 |
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| 摘 要： | 详细讨论了数字正交检测与过采样技术的结合问题.结果表明,通过同时改变采样频率和射频激发与参考的频率差,采集到的NMR数据经过一次数字滤波即可完成数字正交检测和过采样的数据处理过程.从而使得总的数据处理过程能够在大多数情况下在等待磁化矢量恢复的时间内完成.
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| 关 键 词： | 数字正交检测 过采样 数据处理 |
| 收稿时间： | 1999-09-13 |
Combination of Digital Quadrature Detection and Over-Sampling Techniques |
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| LI Gengying,JIANG Yu,YAN Xiaolong.Combination of Digital Quadrature Detection and Over-Sampling Techniques[J].Chinese Journal of Magnetic Resonance,2000,17(1):73-78. |
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| Authors: | LI Gengying JIANG Yu YAN Xiaolong |
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| Institution: | Analytical Center, East China Normal University, Shanghai 200062 |
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| Abstract: | Combination of digital quadrature detection and over sampling techniques is discussed in detail. It is demonstrated by theoretical analysis and experimental result that, through simultaneous changes of sampling frequency and the frequency difference between radio frequency irradiation and reference signals, one can complete the NMR data processing procedure with performing digital filtration once. As a result, the whole data processing procedure may, in most cases, be accomplished within the time interval waiting for the recovery of the magnetization. |
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| Keywords: | Digital quadrature detection Over sampling Data processing |
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