【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 .更多还原

【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. \;更多还原