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ＡＤＣ 采样速率的要求．最后给出ＮＭＲ 实验结果．
Digital quadrature detection (DQD) of nuclear magnetic resonance signal employs only one channel of analog-to-digit conversion. Therefore, no phase 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. \;
出处
《波谱学杂志》
CAS
CSCD
北大核心
1999年第2期119-124,共6页
Chinese Journal of Magnetic Resonance
基金
国家自然科学基金
"霍英东基金"资助项目
关键词
核磁共振
数字正交检波
数字信号处理
NMR, Digital quadrature detection, Digital signal processing
