波谱学杂志 ›› 1999, Vol. 16 ›› Issue (2): 118-122.

• 研究论文 • 上一篇    下一篇

数字正交检波中的数据处理方法

谢海滨, 李鲠颖   

  1. 华东师范大学分析测试中心, 上海 200062
  • 收稿日期:1998-11-20 修回日期:1998-12-28 出版日期:1999-04-05 发布日期:2018-01-11
  • 作者简介:谢海滨,男,1967年出生,博士生
  • 基金资助:
    国家自然科学基金和"霍英东基金"资助项目

DATA PROCESSING IN DIGITAL QUADRATURE DETECTION

Xie Haibin, Li Gengy ing   

  1. Analytical Center, East China Normal University, Shanghai 200062
  • Received:1998-11-20 Revised:1998-12-28 Online:1999-04-05 Published:2018-01-11

摘要: 详细讨论了数字正交检测中的数字处理方法,通过时域插值和选择适当的数字滤波器,可以降低对A DC采样速率的要求.最后给出NMR实验结果.

关键词: 核磁共振, 数字正交检波, 数字信号处理

Abstract: Digital quadrature detection (DQD) of nuclear magnetic resonance signal employs only one channel of analog-to-digit conversion. Therefore, nophase cycling for radio frequency pulses, indispensable for canceling error or unbalance in the conventional two channel quadrature detection technique, is needed. In the present article, Detailed discussion about data processing in the DQD is shown. The requirement for ADC's sampling rate can be reduced by using interpolation in the time domain and choosing a proper digital filter. Finally, NMR experimental results are demonstrated.

Key words: NMR, Digital quadrature detection, Digital signal processing