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