Application of Software Defined Radio in 500MHz NMR Spectrometers

摘要：

Digital signal processing is one of the most important techniques in 500MHz NMR spectrometers. Free Induction Decay (FID) signal should be quadrature-demodulated from 20MHz intermediate frequency (IF) signal,decimated to a user-defined sample rate and spectrum width. In the design of digital processor of NMR spectrometer console,the techniques of Software Defined Radio (SDR) are applied to achieve digital quadrature demodulation,digital filtering and data decimation. The CIC filter,half-band filter and linear phase FIR filter are designed to process the cascaded filtering and decimation of the demodulated signals. This following simulation shows that this method will achieve a satisfying processing and filtering effect.

关键词： SDR NMR spectrometer CIC filter digital quadrature demodulation data decimation.

作者: Minghua Tian Hongfei Liu Zhong Chen

作者单位: Department of Physics,University of Xiamen,Xiamen,361005,China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 800-804

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）